The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4491 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4491-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Andreas Henriksson     February 23, 2026                             https://wiki.debian.org/LTS
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    Package        : glib2.0     Version        : 2.66.8-1+deb11u8     CVE ID         : CVE-2026-0988 CVE-2026-1484 CVE-2026-1485 CVE-2026-1489     Debian Bug     : 1125752 1126549 1126550 1126551

    Multiple issues were found in GLib, a general-purpose, portable utility     library, that could lead to denial of service, memory corruption or     potentially arbitrary code execution if maliciously crafted data is     processed.

    CVE-2026-0988

        Codean Labs found missing validation of offset and count parameters in the         g_buffered_input_stream_peek() function can lead to an integer overflow         during length calculation. When specially crafted values are provided, this         overflow results in an incorrect size being passed to memcpy(), triggering         a buffer overflow. This can cause application crashes, leading to a Denial         of Service (DoS).

    CVE-2026-1484

        treeplus with additional thanks to Sovereign Tech Resilience program of the         Sovereign Tech Agency found in the GLib Base64 encoding routine when         processing very large input data. Due to incorrect use of integer types         during length calculation, the library may miscalculate buffer boundaries.
        This can cause memory writes outside the allocated buffer. Applications         that process untrusted or extremely large Base64 input using GLib may crash         or behave unpredictably.

    CVE-2026-1485

        treeplus with additonal thanks to Sovereign Tech Resilience program of the         Sovereign Tech Agency found a flaw in Glib's content type parsing logic.
        This buffer underflow vulnerability occurs because the length of a header         line is stored in a signed integer, which can lead to integer wraparound         for very large inputs. This results in pointer underflow and out-of-bounds         memory access. Exploitation requires a local user to install or         process a specially crafted treemagic file, which can lead to local         denial of service or application instability.

    CVE-2026-1489

        treeplus with additional thanks to Sovereign Tech Resilience program of the         Sovereign Tech Agency found a flaw n GLib. An integer overflow         vulnerability in its Unicode case conversion implementation can lead to         memory corruption. By processing specially crafted and extremely large         Unicode strings, an attacker could trigger an undersized memory allocation,         resulting in out-of-bounds writes. This could cause applications utilizing         GLib for string conversion to crash or become unstable.

    For Debian 11 bullseye, these problems have been fixed in version     2.66.8-1+deb11u8.

    We recommend that you upgrade your glib2.0 packages.

    For the detailed security status of glib2.0 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/glib2.0

    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     Attachment:
    signature.asc     Description: PGP signature

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-4491 : libglib2.0-0 - security update

medium Nessus Plugin ID 299773

Version 1.3

Version 1.2

Version 1.1

Version 1.3 Jul 18, 2026, 3:00 PM Plugin metadata (Add IAVM Info) Plugin Feed: 202607181500
Version 1.2 Mar 23, 2026, 11:56 AM CVSS metrics ("CVSSv3 score" set to 5.4) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L") CVSSv3 score source (changed from "CVE-2026-1485" to none) CVSSv3 severity (based on None, severity increased from "Low" to "Medium") Plugin Feed: 202603231156
Version 1.1 Feb 23, 2026, 9:37 PM New Plugin Feed: 202602232137