Description
The KEYS subsystem in the Linux kernel before 4.13.10 does not correctly synchronize the actions of updating versus finding a key in the "negative" state to avoid a race condition, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls.
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 | 4.13.10-1 | — |
| Debian 13 | linux | 4.13.10-1 | — |
| Debian 12 | linux | 4.13.10-1 | — |
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 +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-hwe +1 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-101.124 | USN-3485-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1041.50 | USN-3485-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.13.0-1005.7 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.13.0-1002.5 | USN-3507-2 |
| Ubuntu 16.04 LTS | linux-gke | 4.4.0-1034.34 | USN-3485-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-32.35~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1010.15 | USN-3485-1 |
| Ubuntu 16.04 LTS | linux-oem | 4.13.0-1010.11 | — |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1077.85 | USN-3485-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1079.84 | USN-3485-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1003.3 | USN-3485-3 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-101.124~14.04.1 | USN-3485-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-docs +4 | 4.4.120-94.17.1 | SUSE-SU-2018:0786-1 |
| SLES 12 SP2 | kernel-docs +4 | 4.4.120-92.70.1 | SUSE-SU-2018:0785-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.120-94.17.1 | SUSE-SU-2018:0786-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.120-92.70.1 | SUSE-SU-2018:0785-1 |
| SLE Real Time 12 SP3 | kernel-rt +3 | 4.4.120-3.8.1 | SUSE-SU-2018:0986-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_10 | 1-4.3.1 | SUSE-SU-2018:0786-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_20 | 1-3.3.1 | SUSE-SU-2018:0785-1 |
Advisories 7
- USN-3485-1 linux, linux-aws, linux-gke, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3485-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3485-3 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3507-2 linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:0986-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0785-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:0786-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025