A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.2, Safari 26.2, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, iOS 18.7.2 and iPadOS 18.7.2, visionOS 26.2. Processing maliciously crafted web content may lead to an unexpected process crash.

The remote Debian 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6172 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6172-1                   security@debian.org     https://www.debian.org/security/                           Alberto Garcia     March 21, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : webkit2gtk     CVE ID         : CVE-2025-43214 CVE-2025-43457 CVE-2025-43511 CVE-2026-20608                      CVE-2026-20635 CVE-2026-20636 CVE-2026-20644 CVE-2026-20652                      CVE-2026-20676

    The following vulnerabilities have been discovered in the WebKitGTK     web engine:

    CVE-2025-43214

        shandikri discovered that processing maliciously crafted web         content may lead to an unexpected process crash.

    CVE-2025-43457

         Gary Kwong and Hossein Lotfi discovered that processing          maliciously crafted web content may lead to an unexpected process          crash.

    CVE-2025-43511

        Lee Dong Ha discovered that processing maliciously crafted web         content may lead to an unexpected process crash.

    CVE-2026-20608

        HanQing and Nan Wang discovered that processing maliciously         crafted web content may lead to an unexpected process crash.

    CVE-2026-20635

        EntryHi discovered that processing maliciously crafted web content         may lead to an unexpected process crash.

    CVE-2026-20636

        EntryHi discovered that processing maliciously crafted web content         may lead to an unexpected process crash.

    CVE-2026-20644

        HanQing and Nan Wang discovered that processing maliciously         crafted web content may lead to an unexpected process crash.

    CVE-2026-20652

        Nathaniel Oh discovered that a remote attacker may be able to         cause a denial-of-service.

    CVE-2026-20676

        Tom Van Goethem discovered that a website may be able to track         users through web extensions.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 2.50.6-1~deb12u1.

    For the stable distribution (trixie), these problems have been fixed in     version 2.50.6-1~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.

  - A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 26.2,     Safari 26.2, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, iOS 18.7.2 and iPadOS 18.7.2, visionOS 26.2.
    Processing maliciously crafted web content may lead to an unexpected process crash. (CVE-2025-43511)

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

The version of Apple iOS running on the mobile device is prior to 26.2. It is, therefore, affected by multiple vulnerabilities.

The remote host is running a version of macOS / Mac OS X that is 26.x prior to 26.2. It is, therefore, affected by multiple vulnerabilities:

  - A vulnerability has been identified in the libarchive library. This flaw can be triggered when file     streams are piped into bsdtar, potentially allowing for reading past the end of the file. This out-of-     bounds read can lead to unintended consequences, including unpredictable program behavior, memory     corruption, or a denial-of-service condition. (CVE-2025-5918)

  - libcurl's ASN1 parser code has the `GTime2str()` function, used for parsing an ASN.1 Generalized Time     field. If given an syntactically incorrect field, the parser might end up using -1 for the length of the
    *time fraction*, leading to a `strlen()` getting performed on a pointer to a heap buffer area that is not     (purposely) null terminated. This flaw most likely leads to a crash, but can also lead to heap contents     getting returned to the application when     [CURLINFO_CERTINFO](https://curl.se/libcurl/c/CURLINFO_CERTINFO.html) is used. (CVE-2024-7264)

  - Incorrect security UI in Downloads in Google Chrome prior to 129.0.6668.58 allowed a remote attacker who     convinced a user to engage in specific UI gestures to perform UI spoofing via a crafted HTML page.
    (Chromium security severity: Medium) (CVE-2024-8906)

  - Out of bounds memory access in ANGLE in Google Chrome on Mac prior to 143.0.7499.110 allowed a remote     attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity:
    High) (CVE-2025-14174)

  - The issue was addressed with improved handling of caches. This issue is fixed in macOS Sequoia 15.7.2,     macOS Sonoma 14.8.2. An attacker with physical access may be able to view deleted notes. (CVE-2025-43410)

Note that Nessus has not tested for these issues but has instead relied only on the operating system's self-reported version number.

The version of Apple iOS running on the mobile device is prior to 18.7.2. It is, therefore, affected by multiple vulnerabilities.

ID	Name	Product	Family	Severity
303253	Debian dsa-6172 : gir1.2-javascriptcoregtk-4.0 - security update	Nessus	Debian Local Security Checks	medium
303062	Linux Distros Unpatched Vulnerability : CVE-2025-43511	Nessus	Misc.	medium
278573	Apple iOS < 26.2 Multiple Vulnerabilities (125884)	Nessus	Mobile Devices	high
278572	macOS 26.x < 26.2 Multiple Vulnerabilities (125886)	Nessus	MacOS X Local Security Checks	high
274061	Apple iOS < 18.7.2 Multiple Vulnerabilities (125633)	Nessus	Mobile Devices	high

Detections

Analytics

CVE-2025-43511

medium

Tenable Plugins

medium

medium

high

high

high