CVE-2026-102474

NameCVE-2026-102474
DescriptionA flaw was found in dash. The printf builtin reserves four bytes before converting a Unicode \u or \U escape, but the multi-byte token can need five or six bytes. A local user who can supply such an escape to dash printf or echo %b, including through dash -c and a positional argument, can write one or two bytes past that reservation.
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
dash (PTS)bookworm0.5.12-2vulnerable
forky, sid, trixie0.5.12-12vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
dashsource(unstable)(unfixed)unimportant

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2543004
Negligible security impact

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