VULNERABILITY INTELLIGENCE
CVE-2026-34743
CVSS score1.7 LOW
EPSS probability0.53%
CISA KEVNot currently listed
Published2026-04-02
Last modified2026-07-24
CVSS vectorCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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.
Weakness classification
- CWE-122: Heap-based Buffer Overflow
Primary references
- security-advisories@github.com — Patch
- security-advisories@github.com — Product, Release Notes
- security-advisories@github.com — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108