Description
In the Linux kernel before 4.13.5, a local user could create keyrings for other users via keyctl commands, setting unwanted defaults or causing a denial of service.
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 16.04 LTS | linux | 4.4.0-98.121 | — |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1039.48 | — |
| Ubuntu 16.04 LTS | linux-azure | 4.13.0-1005.7 | — |
| Ubuntu 16.04 LTS | linux-gcp | 4.13.0-1002.5 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-32.35~16.04.1 | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1009.14 | — |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1076.84 | — |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1078.83 | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-157.207 | USN-3754-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-98.121~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-693.21.1.rt56.639.el7 | RHSA-2018:0412 |
| RHEL 7 | perf +18 | 3.10.0-862.el7 | RHSA-2018:1062 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.67.3.el7uek | ELSA-2022-9852 |
Advisories 4
- RHSA-2018:0412 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1062 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3754-1 linux vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- ELSA-2022-9852 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 4, 2022
References
- https://github.com/torvalds/linux/commit/237bbd29f7a049d310d907f4b2716a7feef9abf3
- USN-3754-1 vendor-advisory
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
- 104254 vdb-entry
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3
- https://support.f5.com/csp/article/K37301725
- https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c9
- https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c11
- https://bugzilla.redhat.com/show_bug.cgi?id=1580979