CVE-2026-42250CWE-787

Off-by-One Leading to Out-of-Bounds Write in bzip2

Medium · published May 28, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
7.4
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
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
EPSS
0.00182 · 7.4th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-05-28T13:15Z
EPSS history
Timeline
  • 28 MAY 13:15Z
    Off-by-One Leading to Out-of-Bounds Write in bzip2
    cvelistv5