CVE-2026-18453

NameCVE-2026-18453
DescriptionA flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service.
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
389-ds-base (PTS)bookworm2.3.1+dfsg1-1+deb12u1vulnerable
trixie3.1.2+dfsg1-1+deb13u1vulnerable
sid3.3.0-2vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
389-ds-basesource(unstable)(unfixed)

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2509696

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