CVE-2026-42250 MEDIUM

CVE-2026-42250: Off-by-One Leading to Out-of-Bounds Write in bzip2

Vendor Bzip2
Product bzip2
Weakness CWE-787
Published May 28, 2026
Last update June 5, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

bzip2 contains an off‑by‑one error in the bzip2recover utility. When processing a specially crafted file, the application performs an out‑of‑bounds write to a global buffer, resulting in memory corruption and a crash (denial of service). This issue was fixed in bzip2 patch 35d122a3df8b0cc4082a4d89fdc6ee99f375fe67

Key dates

02Disclosure timeline

May 28, 2026 CVE published
June 5, 2026 Record updated