CVE-2026-33630

NameCVE-2026-33630
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
c-ares (PTS)bullseye (security), bullseye1.17.1-1+deb11u3fixed
bookworm1.18.1-3fixed
trixie (security), trixie1.34.5-1+deb13u1vulnerable
forky, sid1.34.8-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
c-aressourcebullseye(not affected)
c-aressourcebookworm(not affected)
c-aressource(unstable)1.34.7-1

Notes

[trixie] - c-ares <no-dsa> (Minor issue)
[bookworm] - c-ares <not-affected> (Vulnerable event-loop code not present; read_answers()/requeue/host_query re-entrancy introduced in the 1.20+ rewrite, cf. CVE-2025-31498)
[bullseye] - c-ares <not-affected> (Vulnerable event-loop code not present; cf. CVE-2025-31498)
https://www.openwall.com/lists/oss-security/2026/07/06/8
https://github.com/c-ares/c-ares/security/advisories/GHSA-6wfj-rwm7-3542
Fixed by: https://github.com/c-ares/c-ares/commit/1fa3b86a0b8d18fe7b60f3228a01d770feb026bc (main)
Fixed by: https://github.com/c-ares/c-ares/commit/d823199b688052dcdc1646f2ab4cb8c16b1c644a (v1.34.7)

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