The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4849 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4849-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Andrej Shadura     October 22, 2026                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : expat     Version        : 2.5.0-1+deb12u5     CVE ID         : CVE-2025-59375 CVE-2026-56132 CVE-2026-77214 CVE-2026-102633

    Multiple vulnerabilities have been found in expat.

    CVE-2025-59375

        The patchset previously uploaded in DLA-4807-1 did not fully address         the issue since a major part of it was conditionally included only         when XML_GE was enabled.  This upload enables that define.

    CVE-2026-56132

        A heap-based buffer overflow in doProlog in xmlparse.c caused by         scaffold backing array reallocation which was mishandled when there         was data-structure sharing across parsers.

    CVE-2026-77214

        A heap buffer over-read vulnerability in XML_ParseBuffer allowed         recovering heap pointers, libc function pointers, and code pointers         sufficient to defeat ASLR and build further exploitation primitives.

    CVE-2026-102633

        An integer overflow vulnerability in expat_realloc() function on         32-bit platforms when computing allocation sizes was found in the         code fixing CVE-2025-59375

    For Debian 12 bookworm, these problems have been fixed in version     2.5.0-1+deb12u5.

    We recommend that you upgrade your expat packages.

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

    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 these issues but has instead relied only on the application's self-reported version number.

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Debian dla-4849 : expat - security update

high Nessus Plugin ID 370475

Version 1.3