util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8702-1 advisory.

    It was discovered that libblkid in util-linux had a heap use-after-free vulnerability during nested     partition probing. An attacker who could present a crafted block device image could possibly use this     issue to obtain sensitive information or cause a denial of service. (CVE-2026-13595)

    It was discovered that the mount utility in util-linux had a time-of-check- time-of-use vulnerability when     setting up loop devices. A local attacker could possibly use this issue to obtain unauthorized read access     to root- protected files and block devices. (CVE-2026-27456)

    It was discovered that the login utility in util-linux improperly canonicalized hostnames when invoked     with the -h option. A remote attacker could possibly use this issue to bypass host-based access control     rules. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-3184)

    It was discovered that libmount in util-linux had a time-of-check-time-of- use vulnerability in its     ownership hook. A local attacker could possibly use this issue to gain elevated privileges. This issue     only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-53612)

    It was discovered that libmount in util-linux had a time-of-check-time-of- use vulnerability that allowed     target path redirection during mount operations. A local attacker could possibly use this issue to gain     elevated privileges. (CVE-2026-53613)

    It was discovered that libmount in util-linux improperly handled the LIBMOUNT_FORCE_MOUNT2 environment     variable in the SUID mount utility. A local attacker could possibly use this issue to bypass nosuid and     noexec mount options and gain elevated privileges. This issue only affected Ubuntu 24.04 LTS and Ubuntu     26.04 LTS. (CVE-2026-53614)

    It was discovered that libblkid in util-linux had an integer overflow vulnerability when parsing DOS     partition tables. An attacker who could present a crafted block device image could possibly use this issue     to cause a denial of service. (CVE-2026-53615)

Tenable has extracted the preceding description block directly from the Ubuntu 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:

  - util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in
    `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does
    not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a
    crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to
    sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises
    the integrity of the reported partition metadata; disk modification or availability loss requires a
    separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4. (CVE-2026-53615)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1916 advisory.

    Integer Overflow or Wraparound in libblkid/src/partitions/dos.c (CVE-2026-53615)

Tenable has extracted the preceding description block directly from the tested product 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 version of util-linux installed on the remote host is prior to 2.30.2-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3789 advisory.

    Integer Overflow or Wraparound in libblkid/src/partitions/dos.c (CVE-2026-53615)

Tenable has extracted the preceding description block directly from the tested product 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in     `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does     not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a     crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to     sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises     the integrity of the reported partition metadata; disk modification or availability loss requires a     separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4. (CVE-2026-53615)

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

ID	Name	Product	Family	Type	Severity
365456	Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : util-linux vulnerabilities (USN-8702-1)	Nessus	Ubuntu Local Security Checks	Local	medium
460229	Echo: util-linux: security update to 2.41.5-0+deb13u1+e1	Tenable Cloud Security	Echo Local Security Checks	Local	high
460229	Echo: util-linux: security update to 2.41.5-0+deb13u1+e1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
327388	Amazon Linux 2023 : libblkid, libblkid-devel, libfdisk (ALAS2023-2026-1916)	Nessus	Amazon Linux Local Security Checks	Local	high
325571	Amazon Linux 2 : util-linux, --advisory ALAS2-2026-3789 (ALAS-2026-3789)	Nessus	Amazon Linux Local Security Checks	Local	high
321424	Linux Distros Unpatched Vulnerability : CVE-2026-53615	Nessus	Misc.	Local	high

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CVE-2026-53615

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Tenable Plugins

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