DescriptionThe mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
Debian Bugs989147

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
glibc (PTS)buster2.28-10+deb10u1vulnerable
bookworm, sid2.33-7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[buster] - glibc <no-dsa> (Minor issue)
[stretch] - glibc <no-dsa> (Minor issue);a=commit;h=42d359350510506b87101cf77202fefcbfc790cb;a=commit;h=217b6dc298156bdb0d6aea9ea93e7e394a5ff091
When fixing this issue the fix needs to be applied such that CVE-2021-38604
is not opened, CVE-2021-38604 information:;a=commit;h=4cc79c217744743077bf7a0ec5e0a4318f1e6641;a=commit;h=b805aebd42364fe696e417808a700fdb9800c9e8

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