XZ Utils provide a general-purpose data-compression library plus command-line tools. In XZ Utils 5.3.3alpha to 5.8.0, the multithreaded .xz decoder in liblzma has a bug where invalid input can at least result in a crash. The effects include heap use after free and writing to an address based on the null pointer plus an offset. Applications and libraries that use the lzma_stream_decoder_mt function are affected. The bug has been fixed in XZ Utils 5.8.1, and the fix has been committed to the v5.4, v5.6, v5.8, and master branches in the xz Git repository. No new release packages will be made from the old stable branches, but a standalone patch is available that applies to all affected releases.

redhat RHSA-2025:7524: RHSA-2025:7524: xz security update (Important)

The remote Debian 12 host has packages installed that are affected by a vulnerability as referenced in the dsa-5895 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-5895-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     April 05, 2025                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : xz-utils     CVE ID         : CVE-2025-31115

    Harri K. Koskinen discovered a flaw in the multithreaded .xz decoder     lzma_stream_decoder_mt in xz-utils, the XZ-format compression utilities,     which may lead to denial of service (application crash) or the execution     of arbitrary code.

    For the stable distribution (bookworm), this problem has been fixed in     version 5.4.1-1.

    We recommend that you upgrade your xz-utils packages.

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

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

The remote Fedora 41 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2025-051becf4f2 advisory.

    xz 5.8.1


Tenable has extracted the preceding description block directly from the Fedora 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 Fedora 40 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2025-4871b31998 advisory.

    xz 5.8.1


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

An update of the xz package has been released.

The remote host is affected by the vulnerability described in GLSA-202504-01 (XZ Utils: Use after free)

    A use-after-free has been discovered in XZ utils. Please review the CVE identifier referenced below for     details.

Tenable has extracted the preceding description block directly from the Gentoo 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:1137-1 advisory.

    - CVE-2025-31115: Fixed heap use after free and writing to an address based on the null pointer plus an     offset (bsc#1240414)

Tenable has extracted the preceding description block directly from the SUSE 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 Ubuntu 24.04 LTS / 24.10 host has packages installed that are affected by a vulnerability as referenced in the USN-7414-1 advisory.

    Harri K. Koskinen discovered that XZ Utils incorrectly handled the threaded xz decoder. If a user or     automated system were tricked into processing an xz file, a remote attacker could use this issue to cause     XZ Utils to crash, resulting in a denial of service, or possibly execute arbitrary code.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
236775	Debian dsa-5895 : liblzma-dev - security update	Nessus	Debian Local Security Checks	high
235682	Fedora 41 : perl-Compress-Raw-Lzma / xz (2025-051becf4f2)	Nessus	Fedora Local Security Checks	high
235677	Fedora 40 : perl-Compress-Raw-Lzma / xz (2025-4871b31998)	Nessus	Fedora Local Security Checks	high
233960	Photon OS 5.0: Xz PHSA-2025-5.0-0496	Nessus	PhotonOS Local Security Checks	high
233877	GLSA-202504-01 : XZ Utils: Use after free	Nessus	Gentoo Local Security Checks	high
233842	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xz (SUSE-SU-2025:1137-1)	Nessus	SuSE Local Security Checks	high
233831	Ubuntu 24.04 LTS / 24.10 : XZ Utils vulnerability (USN-7414-1)	Nessus	Ubuntu Local Security Checks	high

Detections

Analytics

CVE-2025-31115

high

Tenable Plugins

Coming Soon

high

high

high

high

high

high

high