Description
The sanity_check_raw_super function in fs/f2fs/super.c in the Linux kernel before 4.11.1 does not validate the segment count, which allows local users to gain privileges via unspecified vectors.
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 | 4.9.30-1 | — |
| Debian 13 | linux | 4.9.30-1 | — |
| Debian 12 | linux | 4.9.30-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-gcp-6.11 +4 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-83.106 | — |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1022.31 | — |
| Ubuntu 16.04 LTS | linux-gke | 4.4.0-1018.18 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.10.0-32.36~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1061.69 | — |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1063.68 | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-135.184 | USN-3470-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-83.106~14.04.1 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Advisories 1
- USN-3470-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
References
- 100215 vdb-entry
- https://source.android.com/security/bulletin/2017-08-01
- https://github.com/torvalds/linux/commit/b9dd46188edc2f0d1f37328637860bb65a771124
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b9dd46188edc2f0d1f37328637860bb65a771124
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.1
- https://bugzilla.redhat.com/show_bug.cgi?id=1481146