CVE-2026-34743
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.
Scoring
- Severity
- LOW
- CVSS base score
- 1.7
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
- EPSS probability
- 0.45%
- CWE
- CWE-122
- Published
- 2026-04-02
- Last modified
- 2026-09-14
Affected products
- tukaani-project xz
Weakness type
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