Descriptionsnap-confine as included in snapd before 2.39 did not guard against symlink races when performing the chdir() to the current working directory of the calling user, aka a "cwd restore permission bypass."
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs928052

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
snapd (PTS)buster2.37.4-1+deb10u1vulnerable
buster (security)2.37.4-1+deb10u3vulnerable
bullseye (security), bullseye2.49-1+deb11u2fixed
trixie, sid2.61.1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[buster] - snapd <no-dsa> (Minor issue)
[stretch] - snapd <no-dsa> (Minor issue)

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