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Full vulnerability report · 2026
CVE-2026-33416High confidence

LIBPNG has use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE`

pnggroup · libpng

Official source article: GitHub GHSA-M4PC-P4Q3-4C7J ↗. Check the applicable product and release in the original source.

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 1 Apr 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • EPSS is 1.05% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs pnggroup libpng 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: Within 3 daysRemediation target: Within 90 days

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.

Distribution package intelligence

Release-specific package status

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

8 package states
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
Alpine v3.23v3.23 · mainlibpngVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.6.56-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainlibpngVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.6.56-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainlibpngVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.6.56-r0Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourcelibpng1.6Vendor fix publishedDebian records a fixed source-package version for this release.1.6.48-1+deb13u4Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcelibpng1.6Vendor fix publishedDebian records a fixed source-package version for this release.1.6.39-2+deb12u4Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcelibpng1.6Vendor fix publishedDebian records a fixed source-package version for this release.1.6.56-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcelibpng1.6Vendor fix publishedDebian records a fixed source-package version for this release.1.6.56-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelibpng1.6Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1.6.43-5ubuntu0.6Canonical Ubuntu Security ↗Source updated 5 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-2026-33416 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitylibpng: libpng: Arbitrary code execution due to use-after-free vulnerability
19 known affected

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

  • java-1.8.0-openjdk-portable.src as a component of Red Hat build of OpenJDK 1.8
  • java-17-openjdk.src as a component of Red Hat build of OpenJDK 1.8
  • java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 1.8
  • java-21-openjdk.src as a component of Red Hat build of OpenJDK 1.8
  • java-17-openjdk-portable.src as a component of Red Hat build of OpenJDK 17
  • java-17-openjdk.src as a component of Red Hat build of OpenJDK 17
  • java-21-openjdk-portable.src as a component of Red Hat build of OpenJDK 21
  • java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 21
  • java-21-openjdk.src as a component of Red Hat build of OpenJDK 21
  • java-25-openjdk-portable.src as a component of Red Hat build of OpenJDK 25
  • libpng as a component of Red Hat Enterprise Linux 6
  • libpng-devel as a component of Red Hat Enterprise Linux 6
Summary
A flaw was found in libpng, a library used for processing PNG (Portable Network Graphics) image files. This vulnerability arises from improper memory management where a heap-allocated buffer is aliased between internal data structures. When specific functions are called, a freed memory region can still be referenced, leading to a use-after-free condition. An attacker could potentially exploit this to achieve arbitrary code execution or cause a denial of service.
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-2026-16258

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

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE` each alias a heap-allocated buffer between `png_struct` and `png_info`, sharing a single allocation across two structs with independent lifetimes. The `trans_alpha` aliasing has been present since at least libpng 1.0, and the `palette` aliasing since at least 1.2.1. Both affect all prior release lines `png_set_tRNS` sets `png_ptr->trans_alpha = info_ptr->trans_alpha` (256-byte buffer) and `png_set_PLTE` sets `info_ptr->palette = png_ptr->palette` (768-byte buffer). In both cases, calling `png_free_data` (with `PNG_FREE_TRNS` or `PNG_FREE_PLTE`) frees the buffer through `info_ptr` while the corresponding `png_ptr` pointer remains dangling. Subsequent row-transform functions dereference and, in some code paths, write to the freed memory. A second call to `png_set_tRNS` or `png_set_PLTE` has the same effect, because both functions call `png_free_data` internally before reallocating the `info_ptr` buffer. Version 1.6.56 fixes the issue.

What

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE` each alias a heap-allocated buffer between `png_struct` and `png_info`, sharing a single allocation across two structs with independent lifetimes. The `trans_alpha` aliasing has been present since at least libpng 1.0, and the `palette` aliasing since at least 1.2.1. Both affect all prior release lines `png_set_tRNS` sets `png_ptr->trans_alpha = info_ptr->trans_alpha` (256-byte buffer) and `png_set_PLTE` sets `info_ptr->palette = png_ptr->palette` (768-byte buffer). In both cases, calling `png_free_data` (with `PNG_FREE_TRNS` or `PNG_FREE_PLTE`) frees the buffer through `info_ptr` while the corresponding `png_ptr` pointer remains dangling. Subsequent row-transform functions dereference and, in some code paths, write to the freed memory. A second call to `png_set_tRNS` or `png_set_PLTE` has the same effect, because both functions call `png_free_data` internally before reallocating the `info_ptr` buffer. Version 1.6.56 fixes the issue.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE` each alias a heap-allocated buffer between `png_struct` and `png_info`, sharing a single allocation across two structs with independent lifetimes. The `trans_alpha` aliasing has been present since at least libpng 1.0, and the `palette` aliasing since at least 1.2.1. Both affect all prior release lines `png_set_tRNS` sets `png_ptr->trans_alpha = info_ptr->trans_alpha` (256-byte buffer) and `png_set_PLTE` sets `info_ptr->palette = png_ptr->palette` (768-byte buffer). In both cases, calling `png_free_data` (with `PNG_FREE_TRNS` or `PNG_FREE_PLTE`) frees the buffer through `info_ptr` while the corresponding `png_ptr` pointer remains dangling. Subsequent row-transform functions dereference and, in some code paths, write to the freed memory. A second call to `png_set_tRNS` or `png_set_PLTE` has the same effect, because both functions call `png_free_data` internally before reallocating the `info_ptr` buffer. Version 1.6.56 fixes the issue.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. 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
a network path → Use After Free → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-416Public exploit reference
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-3043IBM QRadar SIEM: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen und um beliebigen Programmcode auszuführen.

Official advisory ↗
BSI · German · WID-SEC-2026-2919IBM App Connect Enterprise: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM App Connect Enterprise ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
BSI · German · WID-SEC-2026-0870libpng: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in libpng ausnutzen, um beliebigen Programmcode auszuführen oder einen Denial of Service zu verursachen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260401Security Bulletin 01 Apr 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 01 Apr 2026, published on 1 April 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1206Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2026-27205 Référence CVE CVE-2026-27903 https://www.cve.org/CVERecord?id=CVE-2026-27903 Référence CVE CVE-2026-27904 https://www.cve.org/CVERecord?id=CVE-2026-27904 Référence CVE CVE-2026-2950 https://www.cve.org/CVERecord?id=CVE-2026-2950 Référence CVE CVE-2026-30922 https://www.cve.org/CVERecord?id=CVE-2026-30922 Référence CVE CVE-2026-31958 https://www.cve.org/CVERecord?id=CVE-2026-31958 Référence CVE CVE-2026-33230 https://www.cve.org/CVERecord?id=CVE-2026-33230 Référence CVE CVE-2026-33231 https://www.cve.org/CVERecord?id=CVE-2026-33231 Référence CVE CVE-2026-33236 https://www.cve.org/CVERecord?id=CVE-2026-33236 Référence CVE CVE-2026-33416 https://www.cve.org/CVERecord?id=CVE-2026-33416 Référence CVE CVE-2026-34073 https://www.cve.org/CVERecord?id=CVE-2026-34073 Référence CVE CVE-2026-34197 https://www.cve.org/CVERecord?id=CVE-2026-34197 Référence CVE CVE-2026-34268 https://www.cve.org/CVERecord?id=CVE-2026-34268 Référence CVE CVE-2026-34282 https://www.cve.org/CVERecord?id=CVE-2026-34282 Référence CVE CVE-2026-34477 https://www.cve.org/CVERecord?id=CVE-2026-34477 Référence CVE CVE-2026-34478 https://www.cve.org/CVERecord?id=CVE-2026-34478 Référence CVE CVE-2026-34479 https://www.cve.org/CVERecord?id=CVE-2026-34479 Référence CVE CVE-2026-34480 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1094Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2026-31488 Référence CVE CVE-2026-31692 https://www.cve.org/CVERecord?id=CVE-2026-31692 Référence CVE CVE-2026-31802 https://www.cve.org/CVERecord?id=CVE-2026-31802 Référence CVE CVE-2026-32286 https://www.cve.org/CVERecord?id=CVE-2026-32286 Référence CVE CVE-2026-3304 https://www.cve.org/CVERecord?id=CVE-2026-3304 Référence CVE CVE-2026-33227 https://www.cve.org/CVERecord?id=CVE-2026-33227 Référence CVE CVE-2026-33230 https://www.cve.org/CVERecord?id=CVE-2026-33230 Référence CVE CVE-2026-33231 https://www.cve.org/CVERecord?id=CVE-2026-33231 Référence CVE CVE-2026-33236 https://www.cve.org/CVERecord?id=CVE-2026-33236 Référence CVE CVE-2026-33416 https://www.cve.org/CVERecord?id=CVE-2026-33416 Référence CVE CVE-2026-33558 https://www.cve.org/CVERecord?id=CVE-2026-33558 Référence CVE CVE-2026-33671 https://www.cve.org/CVERecord?id=CVE-2026-33671 Référence CVE CVE-2026-33672 https://www.cve.org/CVERecord?id=CVE-2026-33672 Référence CVE CVE-2026-33750 https://www.cve.org/CVERecord?id=CVE-2026-33750 Référence CVE CVE-2026-33845 https://www.cve.org/CVERecord?id=CVE-2026-33845 Référence CVE CVE-2026-33846 https://www.cve.org/CVERecord?id=CVE-2026-33846 Référence CVE CVE-2026-34043 https://www.cve.org/CVERecord?id=CVE-2026-34043 Référence CVE CVE-2026-34197 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0381Multiples vulnérabilités dans les produits Microsoft

De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-009946PNG Development Groupのlibpngにおける解放済みメモリの使用に関する脆弱性

LIBPNGは、PNG（Portable Network Graphics）ラスター画像ファイルを読み込み、作成し、操作するアプリケーションで使用されるリファレンスライブラリです。バージョン1.2.1から1.6.55において、`png_set_tRNS`と`png_set_PLTE`はそれぞれ、`png_struct`と`png_info`間のヒープに割り当てられたバッファをエイリアスしており、独立したライフタイムを持つ2つの構造体で単一の割り当てを共有しています。`trans_alpha`のエイリアスは少なくともlibpng 1.0から存在しており、`palette`のエイリアスは少なくとも1.2.1から存在しています。これらはすべての以前のリリースラインに影響を及ぼします。`png_set_tRNS`は`png_ptr-trans_alpha = info_ptr-trans_alpha`（256バイトのバッファ）を設定し、`png_set_PLTE`は`info_ptr-palette = png_ptr-palette`（768バイトのバッファ）を設定します。両方の場合において、`png_free_data`（`PNG_FREE_TRNS`または`PNG_FREE_PLTE`で）を呼び出すと、そのバッファが`info_ptr`を通じて解放される一方で、対応する`png_ptr`のポインタはダングリング状態のまま残ります。その後の行変換関数は解放されたメモリを参照し、いくつかのコードパスでは書き込みも行います。`png_set_tRNS`または`png_set_PLTE`の2回目の呼び出しは同様の影響を及ぼします。なぜなら、両関数は内部で`png_free_data`を呼び出してから`info_ptr`のバッファを再割り当てするためです。バージョン1.6.56でこの問題は修正されました。

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.
Patch available
Affected
Fixed
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 26 Mar 2026 · Last source change 1 Apr 2026, 03:55 UTC · CWE-416 · Use After Free

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-2026-16258
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
    java-1.8.0-openjdk-portable.src as a component of Red Hat build of OpenJDK 1.8; java-17-openjdk.src as a component of Red Hat build of OpenJDK 1.8; java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 1.8; java-21-openjdk.src as a component of Red Hat build of OpenJDK 1.8; java-17-openjdk-portable.src as a component of Red Hat build of OpenJDK 17; java-17-openjdk.src as a component of Red Hat build of OpenJDK 17; java-21-openjdk-portable.src as a component of Red Hat build of OpenJDK 21; java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 21; java-21-openjdk.src as a component of Red Hat build of OpenJDK 21; java-25-openjdk-portable.src as a component of Red Hat build of OpenJDK 25; libpng as a component of Red Hat Enterprise Linux 6; libpng-devel as a component of Red Hat Enterprise Linux 6; libpng-static as a component of Red Hat Enterprise Linux 6; libpng.src as a component of Red Hat Enterprise Linux 6; mingw-libpng.src as a component of Red Hat Enterprise Linux 8; mingw32-libpng as a component of Red Hat Enterprise Linux 8; mingw32-libpng-static as a component of Red Hat Enterprise Linux 8; mingw64-libpng as a component of Red Hat Enterprise Linux 8; mingw64-libpng-static as a component of Red Hat Enterprise Linux 8 · Fixed: firefox-0:140.9.1-2.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); and 4132 more
    After
    java-1.8.0-openjdk-portable.src as a component of Red Hat build of OpenJDK 1.8; java-17-openjdk.src as a component of Red Hat build of OpenJDK 1.8; java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 1.8; java-21-openjdk.src as a component of Red Hat build of OpenJDK 1.8; java-17-openjdk-portable.src as a component of Red Hat build of OpenJDK 17; java-17-openjdk.src as a component of Red Hat build of OpenJDK 17; java-21-openjdk-portable.src as a component of Red Hat build of OpenJDK 21; java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 21; java-21-openjdk.src as a component of Red Hat build of OpenJDK 21; java-25-openjdk-portable.src as a component of Red Hat build of OpenJDK 25; libpng as a component of Red Hat Enterprise Linux 6; libpng-devel as a component of Red Hat Enterprise Linux 6; libpng-static as a component of Red Hat Enterprise Linux 6; libpng.src as a component of Red Hat Enterprise Linux 6; mingw-libpng.src as a component of Red Hat Enterprise Linux 8; mingw32-libpng as a component of Red Hat Enterprise Linux 8; mingw32-libpng-static as a component of Red Hat Enterprise Linux 8; mingw64-libpng as a component of Red Hat Enterprise Linux 8; mingw64-libpng-static as a component of Red Hat Enterprise Linux 8 · Fixed: firefox-0:140.9.1-2.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); and 4133 more
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    >= 1.2.1, < 1.6.56 · 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
    >= 1.2.1, < 1.6.56 · 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 ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    java-1.8.0-openjdk-portable.src as a component of Red Hat build of OpenJDK 1.8; java-17-openjdk.src as a component of Red Hat build of OpenJDK 1.8; java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 1.8; java-21-openjdk.src as a component of Red Hat build of OpenJDK 1.8; java-17-openjdk.src as a component of Red Hat build of OpenJDK 11 ELS; java-17-openjdk-portable.src as a component of Red Hat build of OpenJDK 17; java-17-openjdk.src as a component of Red Hat build of OpenJDK 17; java-21-openjdk-portable.src as a component of Red Hat build of OpenJDK 21; java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 21; java-21-openjdk.src as a component of Red Hat build of OpenJDK 21; java-25-openjdk-portable.src as a component of Red Hat build of OpenJDK 25; libpng as a component of Red Hat Enterprise Linux 6; libpng-devel as a component of Red Hat Enterprise Linux 6; libpng-static as a component of Red Hat Enterprise Linux 6; libpng.src as a component of Red Hat Enterprise Linux 6; mingw-libpng.src as a component of Red Hat Enterprise Linux 8; mingw32-libpng as a component of Red Hat Enterprise Linux 8; mingw32-libpng-static as a component of Red Hat Enterprise Linux 8; mingw64-libpng as a component of Red Hat Enterprise Linux 8; mingw64-libpng-static as a component of Red Hat Enterprise Linux 8 · Fixed: firefox-0:140.9.1-2.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); and 4133 more
    After
    java-1.8.0-openjdk-portable.src as a component of Red Hat build of OpenJDK 1.8; java-17-openjdk.src as a component of Red Hat build of OpenJDK 1.8; java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 1.8; java-21-openjdk.src as a component of Red Hat build of OpenJDK 1.8; java-17-openjdk-portable.src as a component of Red Hat build of OpenJDK 17; java-17-openjdk.src as a component of Red Hat build of OpenJDK 17; java-21-openjdk-portable.src as a component of Red Hat build of OpenJDK 21; java-21-openjdk-vanilla.src as a component of Red Hat build of OpenJDK 21; java-21-openjdk.src as a component of Red Hat build of OpenJDK 21; java-25-openjdk-portable.src as a component of Red Hat build of OpenJDK 25; libpng as a component of Red Hat Enterprise Linux 6; libpng-devel as a component of Red Hat Enterprise Linux 6; libpng-static as a component of Red Hat Enterprise Linux 6; libpng.src as a component of Red Hat Enterprise Linux 6; mingw-libpng.src as a component of Red Hat Enterprise Linux 8; mingw32-libpng as a component of Red Hat Enterprise Linux 8; mingw32-libpng-static as a component of Red Hat Enterprise Linux 8; mingw64-libpng as a component of Red Hat Enterprise Linux 8; mingw64-libpng-static as a component of Red Hat Enterprise Linux 8 · Fixed: firefox-0:140.9.1-2.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-0:140.9.1-2.el7_9.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); firefox-debuginfo-0:140.9.1-2.el7_9.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.src as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-debuginfo-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.i686 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.ppc64le as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.s390 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.s390x as a component of Red Hat Enterprise Linux Server (v. 7 ELS); libpng-devel-2:1.5.13-8.el7_9.3.x86_64 as a component of Red Hat Enterprise Linux Server (v. 7 ELS); and 4132 more
    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
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-16258↗Red Hat Product Security security advisory↗CVE authority or vendor reference · GitHub GHSA-M4PC-P4Q3-4C7J↗Patch or update reference↗Patch or update reference↗Patch or update reference↗Public exploit 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-2026-33416 · cve.blacktree.nl