SB2026072267 - SUSE update for xz

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Main Vulnerability Database SB2026072267

SB2026072267 - SUSE update for xz

Published: July 22, 2026

Security Bulletin ID SB2026072267
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Heap-based buffer overflow (CVE-ID: CVE-2026-34743)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a buffer overflow.

The vulnerability exists due to a heap-based buffer overflow in lzma_index_append() when appending records to an lzma_index previously produced by lzma_index_decoder() from an Index containing no Records. A remote attacker can trigger this code path to cause a buffer overflow.

The issue requires the uncommon sequence of decoding an Index with no Records and then appending Records to the resulting lzma_index.


Remediation

Install update from vendor's website.

References