Description
kernel/events/core.c in the performance subsystem in the Linux kernel before 4.0 mismanages locks during certain migrations, which allows local users to gain privileges via a crafted application, aka Android internal bug 31095224.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.0.2-1 | — |
| Debian 13 | linux | 4.0.2-1 | — |
| Debian 12 | linux | 4.0.2-1 | — |
| Debian 8 | linux | 3.16.39-1+deb8u1 | DSA-3791-1 |
| Debian 7 | linux | 3.2.84-2 | DLA-833-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +5 | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
Advisories 2
- DLA-833-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3791-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f63a8daa5812afef4f06c962351687e1ff9ccb2b
- https://github.com/torvalds/linux/commit/f63a8daa5812afef4f06c962351687e1ff9ccb2b
- https://bugzilla.redhat.com/show_bug.cgi?id=1403842
- 94679 vdb-entry
- DSA-3791 vendor-advisory
- http://source.android.com/security/bulletin/2016-12-01.html