CVE-2026-128886

NameCVE-2026-128886
DescriptionA flaw was found in dbus when configured with the nonce-tcp transport. An unauthenticated attacker able to connect to an exposed listener can cause a Denial of Service (DoS) by opening a connection and withholding the expected authentication token. Because the server processes this verification without enforcing a timeout, the stalled connection blocks the accept process and prevents legitimate clients from establishing new connections.
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 Bugs1153843

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
dbus (PTS)bookworm1.14.10-1~deb12u1vulnerable
trixie1.16.2-2vulnerable
forky1.16.2-8vulnerable
sid1.16.4-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dbussource(unstable)1.16.4-11153843

Notes

[trixie] - dbus <no-dsa> (Minor issue)
https://gitlab.freedesktop.org/dbus/dbus/-/work_items/586

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