In filterMask of SkEmbossMaskFilter.cpp, there is a possible out of bounds write due to an integer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.

The version of webkitgtk4 installed on the remote host is prior to 2.54.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3987 advisory.

    In filterMask of SkEmbossMaskFilter.cpp, there is a possible out of bounds write due to an integer     overflow. This could lead to remote code execution with no additional execution privileges needed. User     interaction is not needed for exploitation. (CVE-2024-43091)

    In initializeSwizzler of SkBmpStandardCodec.cpp, there is a possible out of bounds write due to a heap     buffer overflow. This could lead to remote escalation of privilege with no additional execution privileges     needed. User interaction is not needed for exploitation. (CVE-2025-26416)

    Out-of-bounds write vulnerability in the skia module.Impact: Successful exploitation of this vulnerability     may affect service confidentiality. (CVE-2025-54627)

    A Content Security Policy bypass was addressed with improved enforcement in AudioWorklet contexts. This     issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5.
    Processing maliciously crafted web content may bypass Content Security Policy. (CVE-2026-43670)

    A permissions issue was addressed by removing the vulnerable code. This issue is fixed in Safari 27, iOS     27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted     web content may disclose sensitive user information. (CVE-2026-64753)

    The issue was addressed with improved checks. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS     18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Visiting a maliciously crafted website may leak     sensitive data. (CVE-2026-64778)

    The issue was addressed with improved input validation. This issue is fixed in Safari 26.6.1, iOS 18.7.10     and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web     content may lead to an unexpected Safari crash. (CVE-2026-64781)

    A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari     26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing     maliciously crafted web content may lead to an unexpected Safari crash. (CVE-2026-64782)

    This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS     18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27. Processing     maliciously crafted web content may lead to an unexpected Safari crash. (CVE-2026-65332)

    This issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS     26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web content may lead to an     unexpected Safari crash. (CVE-2026-65351)

    A logic issue was addressed with improved state management. This issue is fixed in Safari 27, iOS 27 and     iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web     content may lead to an unexpected process termination. (CVE-2026-84635)

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

Note that Nessus has not tested for these issues 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:

  - In filterMask of SkEmbossMaskFilter.cpp, there is a possible out of bounds write due to an integer
    overflow. This could lead to remote code execution with no additional execution privileges needed. User
    interaction is not needed for exploitation. (CVE-2024-43091)

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6534 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6534-1                   security@debian.org     https://www.debian.org/security/                           Alberto Garcia     October 01, 2026                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : webkit2gtk     CVE ID         : CVE-2024-1283 CVE-2024-7966 CVE-2024-8193 CVE-2024-8198                      CVE-2024-8636 CVE-2024-9123 CVE-2024-43091 CVE-2024-43097                      CVE-2024-43767 CVE-2024-43768 CVE-2025-0436 CVE-2025-0444                      CVE-2025-8901 CVE-2025-9478 CVE-2025-10502 CVE-2025-26416                      CVE-2025-32318 CVE-2025-48622 CVE-2025-54627 CVE-2026-0908                      CVE-2026-3536 CVE-2026-3538 CVE-2026-3909 CVE-2026-3931                      CVE-2026-4448 CVE-2026-4460 CVE-2026-4464 CVE-2026-5283                      CVE-2026-5870 CVE-2026-6296 CVE-2026-6298 CVE-2026-6364                      CVE-2026-7353 CVE-2026-7354 CVE-2026-7359 CVE-2026-7900                      CVE-2026-7920 CVE-2026-7923 CVE-2026-7942 CVE-2026-7943                      CVE-2026-7949 CVE-2026-8579 CVE-2026-9877 CVE-2026-9878                      CVE-2026-9879 CVE-2026-9882 CVE-2026-9893 CVE-2026-9899                      CVE-2026-9900 CVE-2026-9901 CVE-2026-9904 CVE-2026-9908                      CVE-2026-9909 CVE-2026-9910 CVE-2026-9911 CVE-2026-9913                      CVE-2026-9914 CVE-2026-9915 CVE-2026-9916 CVE-2026-9923                      CVE-2026-9925 CVE-2026-9926 CVE-2026-9927 CVE-2026-9935                      CVE-2026-9940 CVE-2026-9941 CVE-2026-9942 CVE-2026-9944                      CVE-2026-9946 CVE-2026-9953 CVE-2026-9965 CVE-2026-9969                      CVE-2026-9975 CVE-2026-9981 CVE-2026-9982 CVE-2026-9983                      CVE-2026-9998 CVE-2026-10009 CVE-2026-10011 CVE-2026-10012                      CVE-2026-10018 CVE-2026-10019 CVE-2026-10881 CVE-2026-10883                      CVE-2026-10889 CVE-2026-10907 CVE-2026-10919 CVE-2026-10941                      CVE-2026-10974 CVE-2026-10977 CVE-2026-10979 CVE-2026-10985                      CVE-2026-10993 CVE-2026-10994 CVE-2026-11004 CVE-2026-11024                      CVE-2026-11039 CVE-2026-11040 CVE-2026-11051 CVE-2026-11057                      CVE-2026-11061 CVE-2026-11065 CVE-2026-11066 CVE-2026-11087                      CVE-2026-11088 CVE-2026-11090 CVE-2026-11104 CVE-2026-11109                      CVE-2026-11110 CVE-2026-11111 CVE-2026-11113 CVE-2026-11121                      CVE-2026-11123 CVE-2026-11124 CVE-2026-11137 CVE-2026-11138                      CVE-2026-11159 CVE-2026-11191 CVE-2026-11663 CVE-2026-11675                      CVE-2026-13780 CVE-2026-13781 CVE-2026-13834 CVE-2026-13841                      CVE-2026-13859 CVE-2026-13877 CVE-2026-13883 CVE-2026-13971                      CVE-2026-14044 CVE-2026-14125 CVE-2026-14152 CVE-2026-14382                      CVE-2026-14386 CVE-2026-14387 CVE-2026-14388 CVE-2026-14389                      CVE-2026-14390 CVE-2026-14396 CVE-2026-14398 CVE-2026-14400                      CVE-2026-14410 CVE-2026-14411 CVE-2026-14412 CVE-2026-14413                      CVE-2026-14414 CVE-2026-14418 CVE-2026-14419 CVE-2026-14425                      CVE-2026-14427 CVE-2026-14429 CVE-2026-15109 CVE-2026-15766                      CVE-2026-15774 CVE-2026-16413 CVE-2026-16417 CVE-2026-17653                      CVE-2026-17655 CVE-2026-17667 CVE-2026-17668 CVE-2026-17671                      CVE-2026-17675 CVE-2026-17678 CVE-2026-17682 CVE-2026-17683                      CVE-2026-17687 CVE-2026-17689 CVE-2026-17697 CVE-2026-17702                      CVE-2026-17704 CVE-2026-17714 CVE-2026-17717 CVE-2026-17718                      CVE-2026-17721 CVE-2026-17740 CVE-2026-17745 CVE-2026-17750                      CVE-2026-17757 CVE-2026-17771 CVE-2026-17785 CVE-2026-17801                      CVE-2026-17832 CVE-2026-17847 CVE-2026-17914 CVE-2026-19160                      CVE-2026-19161 CVE-2026-19173 CVE-2026-19176 CVE-2026-43670                      CVE-2026-64715 CVE-2026-64753 CVE-2026-64778 CVE-2026-64779                      CVE-2026-64780 CVE-2026-64781 CVE-2026-64782 CVE-2026-64784                      CVE-2026-65331 CVE-2026-65332 CVE-2026-65333 CVE-2026-65334                      CVE-2026-65336 CVE-2026-65337 CVE-2026-65338 CVE-2026-65340                      CVE-2026-65341 CVE-2026-65351 CVE-2026-76041 CVE-2026-78904                      CVE-2026-78905 CVE-2026-78906 CVE-2026-78914 CVE-2026-78958                      CVE-2026-78965 CVE-2026-79020 CVE-2026-79043 CVE-2026-79112                      CVE-2026-79118 CVE-2026-79120 CVE-2026-79127 CVE-2026-79130                      CVE-2026-79131 CVE-2026-79144 CVE-2026-79147 CVE-2026-79149                      CVE-2026-79188 CVE-2026-79189 CVE-2026-79229 CVE-2026-79269                      CVE-2026-79270 CVE-2026-79275 CVE-2026-84635 CVE-2026-86898

    Several vulnerabilities have been discovered in the WebKitGTK web     engine, that may lead to heap corruption, local privilege escalation,     remote code execution, out-of-bounds memory access, cross-origin data     leak and sandbox escape, among other problems.

    See the WebKitGTK security advisory for details on each vulnerability:
    https://webkitgtk.org/security/WSA-2026-0006.html

    For the stable distribution (trixie), these problems have been fixed in     version 2.54.0-1~deb13u1.

    We recommend that you upgrade your webkit2gtk packages.

    For the detailed security status of webkit2gtk please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/webkit2gtk

    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 these issues 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.

  - In filterMask of SkEmbossMaskFilter.cpp, there is a possible out of bounds write due to an integer     overflow. This could lead to remote code execution with no additional execution privileges needed. User     interaction is not needed for exploitation. (CVE-2024-43091)

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

ID	Name	Product	Family	Type	Severity
371084	SUSE SLED15: WebKitGTK-4.0-lang / WebKitGTK-4.1-lang / WebKitGTK-6.0-lang / etc (SUSE-SU-2026:4858-1)	Nessus	SuSE Local Security Checks	Local	critical
366068	SUSE SLES15: WebKitGTK-4.0-lang / WebKitGTK-4.1-lang / WebKitGTK-6.0-lang / etc (SUSE-SU-2026:4676-1)	Nessus	SuSE Local Security Checks	Local	critical
365286	Amazon Linux 2 : webkitgtk4 (ALAS-2026-3987)	Nessus	Amazon Linux Local Security Checks	Local	critical
472752	Echo: webkit2gtk: security update to 2.54.0-1~deb13u1	Tenable Cloud Security	Echo Local Security Checks	Local	critical
472752	Echo: webkit2gtk: security update to 2.54.0-1~deb13u1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	critical
362455	Debian dsa-6534 : gir1.2-javascriptcoregtk-4.1 - security update	Nessus	Debian Local Security Checks	Local	critical
358438	Linux Distros Unpatched Vulnerability : CVE-2024-43091	Nessus	Misc.	Local	critical

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