libarchive bsdunzip.c list null pointer dereference
n/a · libarchive
4.8MediumCVSS 4.0
Recommended action
Within 7 days
Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
Fix not verified
Distribution package intelligence
Ubuntu vendor package status
Canonical’s release and source-package findings are shown separately from local repository availability.
1 package state
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.
Ubuntu release
Source package
Vendor state
Fixed version
Evidence
Ubuntu 24.04 LTSnoble · standard archive
libarchive
Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.
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-2025-1632 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitylibarchive: null pointer dereference in bsdunzip.c
22 known affected
The vendor explicitly identifies these products as affected by this CVE.
bsdtar as a component of Red Hat Enterprise Linux 10
libarchive as a component of Red Hat Enterprise Linux 10
libarchive-devel as a component of Red Hat Enterprise Linux 10
libarchive.src as a component of Red Hat Enterprise Linux 10
libarchive as a component of Red Hat Enterprise Linux 6
libarchive-devel as a component of Red Hat Enterprise Linux 6
libarchive.src as a component of Red Hat Enterprise Linux 6
bsdcpio as a component of Red Hat Enterprise Linux 7
bsdtar as a component of Red Hat Enterprise Linux 7
libarchive as a component of Red Hat Enterprise Linux 7
libarchive-devel as a component of Red Hat Enterprise Linux 7
libarchive.src as a component of Red Hat Enterprise Linux 7
Summary
A flaw was found in the bsdunzip utility of libarchive. In affected versions, a specially crafted file may trigger a null pointer dereference. This issue can lead to an application crash or other unexpected behavior. This bug does not compromise the integrity or availability of the base system.
Remediation
Fix deferred
Optional official sources
National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.
Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.
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-2025-4364
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 actionWithin 7 days
Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
Fix not verified
01
What, why and how
A vulnerability was found in libarchive up to 3.7.7. It has been classified as problematic. This affects the function list of the file bsdunzip.c. The manipulation leads to null pointer dereference. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
What
A vulnerability was found in libarchive up to 3.7.7. It has been classified as problematic. This affects the function list of the file bsdunzip.c. The manipulation leads to null pointer dereference. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Why
The product dereferences a pointer that it expects to be valid but is NULL.
How
An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
A vulnerability was found in libarchive up to 3.7.7. It has been classified as problematic. This affects the function list of the file bsdunzip.c. The manipulation leads to null pointer dereference. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Why
The product dereferences a pointer that it expects to be valid but is NULL.
How
An attacker operating through local access may attempt exploitation with low privileges. 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.Reference recorded
A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.
Likely attack path
local access → NULL Pointer Dereference → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness ?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
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.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VALowVulnerable-system availability: A successful attack can cause a limited loss.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.
CWE-476Public exploit reference
A
Official authority intelligence
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
ENISA EUVD · EUVD-2025-4364Official EUVD mapping
0 linked advisory records.
Official EUVD recordBSI · German · WID-SEC-W-2025-1850Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff
Ein Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
Official advisoryBSI · German · WID-SEC-W-2025-0432libarchive: Schwachstelle ermöglicht Denial of Service
Ein lokaler Angreifer kann eine Schwachstelle in libarchive ausnutzen, um einen Denial of Service Angriff durchzuführen.
Official advisoryCERT-FR · French · CERTFR-2026-AVI-0266Multiples vulnérabilités dans VMware Tanzu
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 not verified
Affected
bsdtar as a component of Red Hat Enterprise Linux 10; libarchive as a component of Red Hat Enterprise Linux 10; libarchive-devel as a component of Red Hat Enterprise Linux 10; libarchive.src as a component of Red Hat Enterprise Linux 10; libarchive as a component of Red Hat Enterprise Linux 6; libarchive-devel as a component of Red Hat Enterprise Linux 6; libarchive.src as a component of Red Hat Enterprise Linux 6; bsdcpio as a component of Red Hat Enterprise Linux 7; bsdtar as a component of Red Hat Enterprise Linux 7; libarchive as a component of Red Hat Enterprise Linux 7; libarchive-devel as a component of Red Hat Enterprise Linux 7; libarchive.src as a component of Red Hat Enterprise Linux 7; bsdtar as a component of Red Hat Enterprise Linux 8; libarchive as a component of Red Hat Enterprise Linux 8; libarchive-devel as a component of Red Hat Enterprise Linux 8; libarchive.src as a component of Red Hat Enterprise Linux 8; bsdtar as a component of Red Hat Enterprise Linux 9; libarchive as a component of Red Hat Enterprise Linux 9; libarchive-devel as a component of Red Hat Enterprise Linux 9; libarchive.src as a component of Red Hat Enterprise Linux 9; 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
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 24 Feb 2025 · Last source change 24 Feb 2025, 14:25 UTC · CWE-476 · NULL Pointer Dereference
CVE recordCVE.org · 5.1
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-2025-4364
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.
Affected versionsThe structured affected or fixed version information changed.
Before
bsdtar as a component of Red Hat Enterprise Linux 10; libarchive as a component of Red Hat Enterprise Linux 10; libarchive-devel as a component of Red Hat Enterprise Linux 10; libarchive.src as a component of Red Hat Enterprise Linux 10; libarchive as a component of Red Hat Enterprise Linux 6; libarchive-devel as a component of Red Hat Enterprise Linux 6; libarchive.src as a component of Red Hat Enterprise Linux 6; bsdcpio as a component of Red Hat Enterprise Linux 7; bsdtar as a component of Red Hat Enterprise Linux 7; libarchive as a component of Red Hat Enterprise Linux 7; libarchive-devel as a component of Red Hat Enterprise Linux 7; libarchive.src as a component of Red Hat Enterprise Linux 7; bsdtar as a component of Red Hat Enterprise Linux 8; libarchive as a component of Red Hat Enterprise Linux 8; libarchive-devel as a component of Red Hat Enterprise Linux 8; libarchive.src as a component of Red Hat Enterprise Linux 8; bsdtar as a component of Red Hat Enterprise Linux 9; libarchive as a component of Red Hat Enterprise Linux 9; libarchive-devel as a component of Red Hat Enterprise Linux 9; libarchive.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
After
bsdtar as a component of Red Hat Enterprise Linux 10; libarchive as a component of Red Hat Enterprise Linux 10; libarchive-devel as a component of Red Hat Enterprise Linux 10; libarchive.src as a component of Red Hat Enterprise Linux 10; libarchive as a component of Red Hat Enterprise Linux 6; libarchive-devel as a component of Red Hat Enterprise Linux 6; libarchive.src as a component of Red Hat Enterprise Linux 6; bsdcpio as a component of Red Hat Enterprise Linux 7; bsdtar as a component of Red Hat Enterprise Linux 7; libarchive as a component of Red Hat Enterprise Linux 7; libarchive-devel as a component of Red Hat Enterprise Linux 7; libarchive.src as a component of Red Hat Enterprise Linux 7; bsdtar as a component of Red Hat Enterprise Linux 8; libarchive as a component of Red Hat Enterprise Linux 8; libarchive-devel as a component of Red Hat Enterprise Linux 8; libarchive.src as a component of Red Hat Enterprise Linux 8; bsdtar as a component of Red Hat Enterprise Linux 9; libarchive as a component of Red Hat Enterprise Linux 9; libarchive-devel as a component of Red Hat Enterprise Linux 9; libarchive.src as a component of Red Hat Enterprise Linux 9; 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
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.
CVE-2025-1632: libarchive bsdunzip.c list null pointer dereference | BlackTree
