| Name | CVE-2021-33574 |
| Description | The 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3152-1 |
| Debian Bugs | 989147 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| glibc (PTS) | bullseye | 2.31-13+deb11u11 | fixed |
| bullseye (security) | 2.31-13+deb11u10 | fixed |
| bookworm | 2.36-9+deb12u10 | fixed |
| bookworm (security) | 2.36-9+deb12u7 | fixed |
| trixie | 2.41-6 | fixed |
| sid | 2.41-7 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| glibc | source | experimental | 2.32-0experimental0 | | | |
| glibc | source | buster | 2.28-10+deb10u2 | | DLA-3152-1 | |
| glibc | source | bullseye | 2.31-13+deb11u3 | | | |
| glibc | source | (unstable) | 2.32-1 | | | 989147 |
Notes
https://sourceware.org/bugzilla/show_bug.cgi?id=27896
https://sourceware.org/git/?p=glibc.git;a=commit;h=42d359350510506b87101cf77202fefcbfc790cb
https://sourceware.org/git/?p=glibc.git;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:
https://sourceware.org/bugzilla/show_bug.cgi?id=28213
https://sourceware.org/git/?p=glibc.git;a=commit;h=4cc79c217744743077bf7a0ec5e0a4318f1e6641
https://sourceware.org/git/?p=glibc.git;a=commit;h=b805aebd42364fe696e417808a700fdb9800c9e8