A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug events. This could lead to limited information disclosure or denial of service.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3812-1 advisory.

    - CVE-2026-13595: heap use-after-free read in `libblkid` nested partition probing (bsc#1269583).
    - CVE-2026-27456: TOCTOU race condition in the mount program when setting up loop devices (bsc#1261606).
    - Several security issues in releases prior to v2.42.2 and v2.41.5 (bsc#1268886).

Tenable has extracted the preceding description block directly from the SUSE 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 remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3813-1 advisory.

    - CVE-2026-13595: heap use-after-free read in `libblkid` nested partition probing (bsc#1269583).
    - CVE-2026-27456: TOCTOU race condition in the mount program when setting up loop devices (bsc#1261606).
    - Several security issues in releases prior to v2.42.2 and v2.41.5 (bsc#1268886).

Tenable has extracted the preceding description block directly from the SUSE 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 remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3684-1 advisory.

    - CVE-2026-13595: heap use-after-free read in `libblkid` nested partition probing (bsc#1269583).
    - CVE-2026-27456: TOCTOU race condition in the mount program when setting up loop devices (bsc#1261606).
    - Several security issues in releases prior to v2.42.2 and v2.41.5 (bsc#1268886).

Tenable has extracted the preceding description block directly from the SUSE 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 remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3685-1 advisory.

    - CVE-2026-13595: heap use-after-free read in `libblkid` nested partition probing (bsc#1269583).
    - CVE-2026-27456: TOCTOU race condition in the mount program when setting up loop devices (bsc#1261606).
    - Several security issues in releases prior to v2.42.2 and v2.41.5 (bsc#1268886).

Tenable has extracted the preceding description block directly from the SUSE 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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099510 advisory.

    A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix,     Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a     dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this     pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block     device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without     user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug     events. This could lead to limited information disclosure or denial of service.

Tenable has extracted the preceding description block directly from the Unity Linux 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 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6442 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6442-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     August 14, 2026                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : util-linux     CVE ID         : CVE-2026-13595 CVE-2026-27456 CVE-2026-53612 CVE-2026-53613                      CVE-2026-53614     Debian Bug     : 1140194 1140195 1140196

    Several vulnerabilities were discovered in util-linux which could result     in privilege escalation.

    For the stable distribution (trixie), these problems have been fixed in     version 2.41.5-0+deb13u1.

    We recommend that you upgrade your util-linux packages.

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

    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 flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix,     Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a     dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this     pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block     device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without     user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug     events. This could lead to limited information disclosure or denial of service. (CVE-2026-13595)

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

ID	Name	Product	Family	Type	Severity
341656	SUSE SLES15: libblkid-devel / libblkid-devel-static / libblkid1 / etc (SUSE-SU-2026:3812-1)	Nessus	SuSE Local Security Checks	Local	medium
341649	SUSE SLES15: libblkid-devel / libblkid-devel-static / libblkid1 / etc (SUSE-SU-2026:3813-1)	Nessus	SuSE Local Security Checks	Local	medium
339736	SUSE SLED15: libblkid-devel / libblkid-devel-static / libblkid1 / etc (SUSE-SU-2026:3684-1)	Nessus	SuSE Local Security Checks	Local	medium
339726	SUSE SLES15: libblkid-devel / libblkid-devel-static / libblkid1 / etc (SUSE-SU-2026:3685-1)	Nessus	SuSE Local Security Checks	Local	medium
336299	Unity Linux 20.1070e Security Update: util-linux (UTSA-2026-099510)	Nessus	Unity Linux Local Security Checks	Local	medium
335429	Debian dsa-6442 : bsdextrautils - security update	Nessus	Debian Local Security Checks	Local	medium
323761	Linux Distros Unpatched Vulnerability : CVE-2026-13595	Nessus	Misc.	Local	medium

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CVE-2026-13595

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