Remote code execution in XZ Utils



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-31115
CWE-ID CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
 XZ Utils
Universal components / Libraries / Libraries used by multiple products

Vendor tukaani.org

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU106970

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-31115

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the lzma_stream_decoder_mt() function. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

XZ Utils: 5.3.3 alpha - 5.8.0

CPE2.3 External links

https://github.com/tukaani-project/xz/commit/d5a2ffe41bb77b918a8c96084885d4dbe4bf6480
https://github.com/tukaani-project/xz/security/advisories/GHSA-6cc8-p5mm-29w2
https://tukaani.org/xz/xz-cve-2025-31115.patch


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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