CVE-2026-42250

NameCVE-2026-42250
Descriptionbzip2 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
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1138255

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
bzip2 (PTS)bullseye1.0.8-4vulnerable
bookworm1.0.8-5vulnerable
forky, sid, trixie1.0.8-6vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
bzip2source(unstable)(unfixed)1138255

Notes

https://inbox.sourceware.org/bzip2-devel/20260528145407.293768-1-mark@klomp.org/
Fixed by: https://sourceware.org/cgit/bzip2/commit/?id=35d122a3df8b0cc4082a4d89fdc6ee99f375fe67

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