CVE-2026-34743

5.3 MEDIUM
Published: April 02, 2026 Modified: April 15, 2026
View on NVD

Description

XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/tukaani-project/xz/releases/tag/v5.8.3
Source: security-advisories@github.com
Product Release Notes
https://github.com/tukaani-project/xz/security/advisories/GHSA-x872-m794-cxhv
Source: security-advisories@github.com
Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/03/31/13
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Patch Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
0.1%
17th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

tukaani