CVE-2026-47783

NameCVE-2026-47783
DescriptionIn memcached before 1.6.42, username data for SASL password database authentication has a timing side channel because a loop exits as soon as a valid username is found by sasl_server_userdb_checkpass.
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)
ReferencesDLA-4601-1
Debian Bugs1137214

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
memcached (PTS)bullseye1.6.9+dfsg-1vulnerable
bullseye (security)1.6.9+dfsg-1+deb11u1fixed
bookworm1.6.18-1vulnerable
trixie1.6.38-1vulnerable
forky, sid1.6.42-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
memcachedsourcebullseye1.6.9+dfsg-1+deb11u1DLA-4601-1
memcachedsource(unstable)1.6.42-11137214

Notes

Fixed by: https://github.com/memcached/memcached/commit/d13f282b4bce33a9c33b8a1bbf07f12114160fed (1.6.42)
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