Red Hat Enterprise Linux - libpng: libpng: Use-after-free in sequential reader when png_read_end called without reading image rows

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1793972443 advisory.

  - Use-after-free in sequential reader when png_read_end called without reading image rows [fedora-all]     (CVE-2026-46675)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1793972443 advisory.

  - Use-after-free in sequential reader when png_read_end called without reading image rows [fedora-all]     (CVE-2026-46675)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1793890537 advisory.

  - Use-after-free in sequential reader when png_read_end called without reading image rows [fedora-all]     (CVE-2026-46675)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 45 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-0c0574dd9a advisory.

    Update to libpng-1.6.59, fixes CVE-2026-46675.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-2ff2251161 advisory.

    Update to libpng-1.6.59, fixes CVE-2026-46675.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:4796-1 advisory.

    This update for libpng16 fixes the following issue:

    - CVE-2026-46675: Use-after-free of zlib input in `png_read_end` after incomplete zTXt, iTXt or iCCP     decompression       (bsc#1283183).

    Changes for libpng16:

    - version update to 1.6.59:
     * Fixed a regression introduced in version 1.6.47 that caused libpng to reject        hIST chunks in their correct position, after PLTE.
     * Prevented a double free of `png_struct` members after an allocation failure.
     * Applied fixes and updates to the CMake build.
     * Adopted the REUSE Specification for licensing the CI files.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:4801-1 advisory.

    - CVE-2026-46675: Use-after-free of zlib input in `png_read_end` after incomplete zTXt, iTXt or iCCP     decompression       (bsc#1283183).

    Changes for libpng16:

    - version update to 1.6.59 (jsc#PED-16190):
     * Fixed a regression introduced in version 1.6.47 that caused libpng to reject        hIST chunks in their correct position, after PLTE.
     * Prevented a double free of `png_struct` members after an allocation failure.
     * Applied fixes and updates to the CMake build.
     * Adopted the REUSE Specification for licensing the CI files.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8899-1 advisory.

    Ze Sheng discovered that libpng incorrectly handled certain compressed data chunks in PNG files. An     attacker could possibly use this issue to cause a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dla-4824 advisory.

    - -----------------------------------------------------------------------     Debian LTS Advisory DLA-4824-1              debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Utkarsh Gupta     October 06, 2026                            https://wiki.debian.org/LTS
    - -----------------------------------------------------------------------

    Package        : libpng1.6     Version        : 1.6.39-2+deb12u6     CVE ID         : CVE-2026-46675

    A use-after-free was discovered in libpng, a library implementing an     interface for reading and writing PNG (Portable Network Graphics),     which could result in denial of service.

    For Debian 12 bookworm, this problem has been fixed in version     1.6.39-2+deb12u6.

    We recommend that you upgrade your libpng1.6 packages.

    For the detailed security status of libpng1.6 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libpng1.6

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  CVE-2026-46675


The remote Debian 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6537 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6537-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     October 01, 2026                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : libpng1.6     CVE ID         : CVE-2026-46675

    A use-after-free was discovered in libpng, a library implementing an     interface for reading and writing PNG (Portable Network Graphics), which     could result in denial of service.

    For the stable distribution (trixie), this problem has been fixed in     version 1.6.48-1+deb13u6.

    We recommend that you upgrade your libpng1.6 packages.

    For the detailed security status of libpng1.6 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libpng1.6

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of libpng installed on the remote host is prior to 1.6.59. It is, therefore, affected by a vulnerability as referenced in the SSA:2026-273-01 advisory.

    New libpng packages are available for Slackware 15.0 and -current to fix a security issue.

Tenable has extracted the preceding description block directly from the libpng security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Use-after-free in sequential reader when png_read_end called without reading image rows [fedora-all]     (CVE-2026-46675)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
377097	Rocky Linux 9.6 [TuxCare] Security Update: libpng / libpng-devel / libpng-static / libpng-tools (ALMALINUX9.6:CLSA-2026:1793972443)	Nessus	Rocky Linux Local Security Checks	Local	medium
377092	AlmaLinux 9.6 [TuxCare] Security Update: libpng / libpng-devel / libpng-static / libpng-tools (ALMALINUX9.6:CLSA-2026:1793972443)	Nessus	Alma Linux Local Security Checks	Local	medium
376503	AlmaLinux 9.2 [TuxCare] Security Update: libpng / libpng-devel / libpng-static / libpng-tools (ALMALINUX9.2:CLSA-2026:1793890537)	Nessus	Alma Linux Local Security Checks	Local	medium
374683	Fedora 45 : mingw-libpng (2026-0c0574dd9a)	Nessus	Fedora Local Security Checks	Local	medium
371982	Fedora 44 : mingw-libpng (2026-2ff2251161)	Nessus	Fedora Local Security Checks	Local	medium
370392	SUSE SLED15: libpng16-16 / libpng16-16-32bit / libpng16-compat-devel / etc (SUSE-SU-2026:4796-1)	Nessus	SuSE Local Security Checks	Local	medium
370369	SUSE SLES12: libpng16-16 / libpng16-16-32bit / libpng16-compat-devel / etc (SUSE-SU-2026:4801-1)	Nessus	SuSE Local Security Checks	Local	medium
365380	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : libpng vulnerability (USN-8899-1)	Nessus	Ubuntu Local Security Checks	Local	critical
363026	Debian dla-4824 : libpng-dev - security update	Nessus	Debian Local Security Checks	Local	critical
458703	Echo: libpng1.6: security update to 1.6.58-1+e2	Tenable Cloud Security	Echo Local Security Checks	Local	critical
458703	Echo: libpng1.6: security update to 1.6.58-1+e2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	critical
362451	Debian dsa-6537 : libpng-dev - security update	Nessus	Debian Local Security Checks	Local	critical
358435	Slackware Linux 15.0 / current libpng Vulnerability (SSA:2026-273-01)	Nessus	Slackware Local Security Checks	Local	critical
351162	Linux Distros Unpatched Vulnerability : CVE-2026-46675	Nessus	Misc.	Local	critical

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CVE-2026-46675

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