| Name | CVE-2021-28951 |
| Description | An issue was discovered in fs/io_uring.c in the Linux kernel through 5.11.8. It allows attackers to cause a denial of service (deadlock) because exit may be waiting to park a SQPOLL thread, but concurrently that SQPOLL thread is waiting for a signal to start, aka CID-3ebba796fa25. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| NVD severity | medium |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | stretch | 4.9.228-1 | fixed |
| stretch (security) | 4.9.272-2 | fixed | |
| buster | 4.19.208-1 | fixed | |
| buster (security) | 4.19.194-3 | fixed | |
| bullseye | 5.10.70-1 | fixed | |
| bullseye (security) | 5.10.46-5 | fixed | |
| bookworm | 5.14.9-2 | fixed | |
| sid | 5.14.12-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | stretch | (not affected) | |||
| linux | source | buster | (not affected) | |||
| linux | source | (unstable) | 5.10.26-1 |
[buster] - linux <not-affected> (Vulnerable code introduced later)
[stretch] - linux <not-affected> (Vulnerable code introduced later)
https://git.kernel.org/linus/3ebba796fa251d042be42b929a2d916ee5c34a49