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Full vulnerability report · 2026
CVE-2026-41991High confidence

Predictable Temporary File in GNU gzip

GNU · gzip

2.0LowCVSS 4.0
Recommended action
Patch only the product branches with a verified fix

Low technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityLowOperational priority:Low, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.14% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs GNU gzip and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: No default targetRemediation target: Normal maintenance

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Package result overrides the generic status

BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 1 affected package state shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcegzipVendor fix publishedDebian records a fixed source-package version for this release.1.13-1+deb13u1Debian Security Tracker ↗Source updated 7 Oct 2026
Debian bookwormbookworm · sourcegzipAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 7 Oct 2026
Debian forkyforky · sourcegzipVendor fix publishedDebian records a fixed source-package version for this release.1.14-1Debian Security Tracker ↗Source updated 7 Oct 2026
Debian sidsid · sourcegzipVendor fix publishedDebian records a fixed source-package version for this release.1.14-1Debian Security Tracker ↗Source updated 7 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivegzipVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1.12-1ubuntu3.2Canonical Ubuntu Security ↗Source updated 6 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-41991 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitygzip: gzip: Arbitrary file overwrite via insecure temporary file handling in gzexe utility
6 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • gzip.src as a component of Red Hat Enterprise Linux 6
  • gzip as a component of Red Hat Enterprise Linux 7
  • gzip.src as a component of Red Hat Enterprise Linux 7
  • openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4
  • openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4
  • devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces
Summary
A flaw was found in the `gzexe` utility of GNU `gzip`. When the `mktemp` utility is not available, `gzexe` creates temporary files with predictable names based on the process ID. A local attacker can exploit this by pre-creating a symbolic link to an arbitrary file at the predicted temporary file path. This can lead to a Time-of-Check to Time-of-Use (TOCTOU) condition, allowing the attacker to overwrite arbitrary files on the system.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-40068

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

Low technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks. A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite. This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269

What

GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks. A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite. This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269

Why

Creating and using insecure temporary files can leave application and system data vulnerable to attack.

How

An attacker operating through local access may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks. A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite. This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269

Why

Creating and using insecure temporary files can leave application and system data vulnerable to attack.

How

An attacker operating through local access may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Insecure Temporary File → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Passive interaction required
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-377 ↗

CWE-377: Insecure Temporary File. Creating and using insecure temporary files can leave application and system data vulnerable to attack.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.ATPresentAttack requirements: A particular deployment or execution condition must be present.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIPassiveUser interaction: A user must unknowingly interact with the vulnerable system.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VILowVulnerable-system integrity: A successful attack can cause a limited loss.VANoneVulnerable-system availability: No direct loss is represented by this metric.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedCWE-377
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2026-2126gzip: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen in gzip ausnutzen, um Dateien zu manipulieren und um vertrauliche Informationen offenzulegen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260701Security Bulletin 1 July 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 1 July 2026, published on 1 July 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1249Multiples vulnérabilités dans les produits VMware

d?id=CVE-2026-39832 Référence CVE CVE-2026-39833 https://www.cve.org/CVERecord?id=CVE-2026-39833 Référence CVE CVE-2026-39834 https://www.cve.org/CVERecord?id=CVE-2026-39834 Référence CVE CVE-2026-39835 https://www.cve.org/CVERecord?id=CVE-2026-39835 Référence CVE CVE-2026-39836 https://www.cve.org/CVERecord?id=CVE-2026-39836 Référence CVE CVE-2026-39882 https://www.cve.org/CVERecord?id=CVE-2026-39882 Référence CVE CVE-2026-39883 https://www.cve.org/CVERecord?id=CVE-2026-39883 Référence CVE CVE-2026-41889 https://www.cve.org/CVERecord?id=CVE-2026-41889 Référence CVE CVE-2026-41989 https://www.cve.org/CVERecord?id=CVE-2026-41989 Référence CVE CVE-2026-41991 https://www.cve.org/CVERecord?id=CVE-2026-41991 Référence CVE CVE-2026-41992 https://www.cve.org/CVERecord?id=CVE-2026-41992 Référence CVE CVE-2026-42250 https://www.cve.org/CVERecord?id=CVE-2026-42250 Référence CVE CVE-2026-42499 https://www.cve.org/CVERecord?id=CVE-2026-42499 Référence CVE CVE-2026-42501 https://www.cve.org/CVERecord?id=CVE-2026-42501 Référence CVE CVE-2026-42504 https://www.cve.org/CVERecord?id=CVE-2026-42504 Référence CVE CVE-2026-42505 https://www.cve.org/CVERecord?id=CVE-2026-42505 Référence CVE CVE-2026-42507 https://www.cve.org/CVERecord?id=CVE-2026-42507 Référence CVE CVE-2026-42508 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-021834GNU ProjectのGNU gzipにおける安全でない一時ファイルに関する脆弱性

GNU gzipは、gzexeユーティリティにおいて、安全でない一時ファイルの取り扱いに関連する脆弱性を含んでいます。ユーザーのPATHにmktempユーティリティが存在しない場合、gzexeはプロセスID（PID）のみを基に一時ファイルパスを構築します。この予測可能なファイル名は、排他的アクセスや存在チェックなしに作成されます。ローカルの攻撃者は、被害者が書き込み可能な任意のファイルを指すシンボリックリンクとして予測された一時ファイルパスを事前に作成することが可能です。gzexeが実行されると、シンボリックリンクに従ってターゲットファイルを書き換え、チェック時刻から使用時刻までの（TOCTOU）状態を引き起こし、任意のファイルを上書きできるようにします。この問題はコミット4e6f8b24ab823146ab8776f0b7fe486ab34d4269で修正されました。

Official advisory ↗
CERT Polska · Polish · CVE-2026-41991CERT Polska w social mediach

CERT Polska otrzymał zgłoszenie o podatnościach w oprogramowaniu GNU gzip i koordynował proces ujawniania informacji. Podatność CVE-2026-41991 : GNU gzip niepoprawnie obsługuje pliki tymczasowe w funkcjonalności gzexe . Gdy narzędzie mktemp nie jest dostępne w ścieżce użytkownika (PATH), gzexe korzysta z konstruowania ścieżki pliku tymczasowego opartej jedynie na identyfikatorze procesu (PID). Ta przewidywalna nazwa pliku jest tworzona bez sprawdzania uprawnień do pliku ani czy plik już istnieje. Lokalny atakujący może przewidzieć nazwę i utworzyć link symboliczny wskazujący na dowolny plik zapisywalny przez ofiarę. gzexe po uruchomieniu, śledzi link symboliczny i nadpisuje plik docelowy. Problem ten został naprawiony w commitcie 4e6f8b24ab823146ab8776f0b7fe486ab34d4269. Podatność CVE-2026-41992 : GNU gzip zawiera podatność typu global buffer overflow w procesie dekompresji plików LZH , wynikającą z nieprawidłowego ponownego wykorzystania współdzielonego stanu globalnego pomiędzy różnymi formatami dekompresji w ramach jednego uruchomienia. GNU gzip utrzymuje globalną tablicę, która jest współdzielona między przebiegami dekompresji LZ77 , LZW i LZH , i nie jest ponownie inicjalizowana między plikami przetwarzanymi w tym samym wywołaniu. Przez dekompresję spreparowanego pliku LZW , a następnie spreparowanego pliku LZH w jednym poleceniu gzip -d , atakujący może zatruć współdzielony stan globalny i następnie spowodować odczyt poza zakresem w dekoderze LZH . Problem ten został naprawiony w commitach 63dbf6b3b9e6e781df1a6a64e609b10e23969681 i e7378c2d421be6a286922374425680bbe9ad8b7d.

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 29 Jun 2026 · Last source change 29 Jun 2026, 13:31 UTC · CWE-377 · Insecure Temporary File

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-40068
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    ≤ 1.14 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    ≤ 1.14 · Fixed: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    gzip.src as a component of Red Hat Enterprise Linux 6; gzip as a component of Red Hat Enterprise Linux 7; gzip.src as a component of Red Hat Enterprise Linux 7; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4; devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces · Fixed: gzip-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9); and 14 more
    After
    gzip.src as a component of Red Hat Enterprise Linux 6; gzip as a component of Red Hat Enterprise Linux 7; gzip.src as a component of Red Hat Enterprise Linux 7; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4; devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces · Fixed: gzip-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9); and 19 more
    Red Hat Product Security ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    gzip.src as a component of Red Hat Enterprise Linux 6; gzip as a component of Red Hat Enterprise Linux 7; gzip.src as a component of Red Hat Enterprise Linux 7; gzip as a component of Red Hat Enterprise Linux 8; gzip.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4; devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces · Fixed: gzip-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); registry.redhat.io/discovery/discovery-server-rhel9@sha256:5efae8059c9c15454abac947b8482412686d60aaf5c104557d463e8282e340af_amd64 as a component of Red Hat Discovery 2; registry.redhat.io/discovery/discovery-server-rhel9@sha256:e9592a7aa5db3a61a7248d7b0305f3eb2fae189b1d078e483f1cc439f5b2351d_arm64 as a component of Red Hat Discovery 2; gzip-main@aarch64 as a component of Red Hat Hardened Images; gzip-main@src as a component of Red Hat Hardened Images; and 1 more
    After
    gzip.src as a component of Red Hat Enterprise Linux 6; gzip as a component of Red Hat Enterprise Linux 7; gzip.src as a component of Red Hat Enterprise Linux 7; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4; devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces · Fixed: gzip-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debuginfo-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-debugsource-0:1.9-15.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8); gzip-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9); and 14 more
    Red Hat Product Security ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    gzip.src as a component of Red Hat Enterprise Linux 10; gzip.src as a component of Red Hat Enterprise Linux 6; gzip as a component of Red Hat Enterprise Linux 7; gzip.src as a component of Red Hat Enterprise Linux 7; gzip as a component of Red Hat Enterprise Linux 8; gzip.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4; devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces · Fixed: gzip-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-main@aarch64 as a component of Red Hat Hardened Images; gzip-main@src as a component of Red Hat Hardened Images; gzip-main@x86_64 as a component of Red Hat Hardened Images
    After
    gzip.src as a component of Red Hat Enterprise Linux 6; gzip as a component of Red Hat Enterprise Linux 7; gzip.src as a component of Red Hat Enterprise Linux 7; gzip as a component of Red Hat Enterprise Linux 8; gzip.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4; devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces · Fixed: gzip-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debuginfo-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-debugsource-0:1.13-4.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); gzip-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); registry.redhat.io/discovery/discovery-server-rhel9@sha256:5efae8059c9c15454abac947b8482412686d60aaf5c104557d463e8282e340af_amd64 as a component of Red Hat Discovery 2; registry.redhat.io/discovery/discovery-server-rhel9@sha256:e9592a7aa5db3a61a7248d7b0305f3eb2fae189b1d078e483f1cc439f5b2351d_arm64 as a component of Red Hat Discovery 2; gzip-main@aarch64 as a component of Red Hat Hardened Images; gzip-main@src as a component of Red Hat Hardened Images; and 1 more
    Red Hat Product Security ↗
  5. Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-41991 to remediation: access.redhat.com/CVE-2026-41991.
    Before
    remediation: access.redhat.com/CVE-2026-41991
    After
    remediation: access.redhat.com/CVE-2026-41991
    Red Hat Product Security ↗
  6. Affected versionsThe structured affected or fixed version information changed.
    Before
    gzip.src as a component of Red Hat Enterprise Linux 10; gzip.src as a component of Red Hat Enterprise Linux 6; gzip as a component of Red Hat Enterprise Linux 7; gzip.src as a component of Red Hat Enterprise Linux 7; gzip as a component of Red Hat Enterprise Linux 8; gzip.src as a component of Red Hat Enterprise Linux 8; gzip as a component of Red Hat Enterprise Linux 9; gzip.src as a component of Red Hat Enterprise Linux 9; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4; devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces · Fixed: gzip-main@aarch64 as a component of Red Hat Hardened Images; gzip-main@src as a component of Red Hat Hardened Images; gzip-main@x86_64 as a component of Red Hat Hardened Images
    After
    gzip.src as a component of Red Hat Enterprise Linux 10; gzip.src as a component of Red Hat Enterprise Linux 6; gzip as a component of Red Hat Enterprise Linux 7; gzip.src as a component of Red Hat Enterprise Linux 7; gzip as a component of Red Hat Enterprise Linux 8; gzip.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4; devspaces/code-sshd-rhel9 as a component of Red Hat OpenShift Dev Spaces · Fixed: gzip-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.src as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debuginfo-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-debugsource-0:1.12-2.el9_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9); gzip-main@aarch64 as a component of Red Hat Hardened Images; gzip-main@src as a component of Red Hat Hardened Images; gzip-main@x86_64 as a component of Red Hat Hardened Images
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-40068↗Red Hat Product Security security advisory↗Patch or update reference↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-41991 · cve.blacktree.nl