| Name | CVE-2020-29661 |
| Description | A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b. |
| 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-2557-1, DLA-2586-1, DSA-4843-1, ELA-378-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | vulnerable |
| stretch (security) | 4.9.320-2 | fixed | |
| stretch (lts), stretch | 4.9.320-3 | fixed | |
| buster (security), buster, buster (lts) | 4.19.316-1 | fixed | |
| bullseye | 5.10.223-1 | fixed | |
| bullseye (security) | 5.10.226-1 | fixed | |
| bookworm | 6.1.115-1 | fixed | |
| bookworm (security) | 6.1.112-1 | fixed | |
| trixie | 6.11.7-1 | fixed | |
| sid | 6.11.9-1 | fixed | |
| linux-4.19 (PTS) | stretch (security) | 4.19.232-1~deb9u1 | fixed |
| stretch (lts), stretch | 4.19.316-1~deb9u1 | fixed | |
| linux-4.9 (PTS) | jessie, jessie (lts) | 4.9.303-1~deb8u3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | jessie | (unfixed) | end-of-life | ||
| linux | source | stretch | 4.9.258-1 | DLA-2586-1 | ||
| linux | source | buster | 4.19.171-2 | DSA-4843-1 | ||
| linux | source | (unstable) | 5.9.15-1 | |||
| linux-4.19 | source | stretch | 4.19.171-2~deb9u1 | DLA-2557-1 | ||
| linux-4.9 | source | jessie | 4.9.258-1~deb8u1 | ELA-378-1 |
https://git.kernel.org/linus/54ffccbf053b5b6ca4f6e45094b942fab92a25fc
https://bugs.chromium.org/p/project-zero/issues/detail?id=2125
https://googleprojectzero.blogspot.com/2021/10/how-simple-linux-kernel-memory.html