Description
In the Linux kernel, the following vulnerability has been resolved:
perf: Ensure swevent hrtimer is properly destroyed
With the change to hrtimer_try_to_cancel() in
perf_swevent_cancel_hrtimer() it appears possible for the hrtimer to
still be active by the time the event gets freed.
Make sure the event does a full hrtimer_cancel() on the free path by
installing a perf_event::destroy handler.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Linux | 6.17.8 – < 6.18, 6.18 | 6.18 |
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 | 6.18.8-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | linux +8 | No fix yet | — |
| Ubuntu 24.04 LTS | linux-azure-6.17 | 6.17.0-1021.21~24.04.1 | USN-8604-1 |
| Ubuntu 24.04 LTS | linux-azure-fde-6.17 | 6.17.0-1018.18~24.04.1 | USN-8605-1 |
| Ubuntu 24.04 LTS | linux-gcp-6.17 | 6.17.0-1021.24~24.04.1 | USN-8570-1 |
| Ubuntu 24.04 LTS | linux-hwe-6.17 | 6.17.0-41.41~24.04.1 | — |
| Ubuntu 24.04 LTS | linux-nvidia-6.17 | 6.17.0-1031.31 | USN-8669-1 |
| Ubuntu 24.04 LTS | linux-oem-6.17 | 6.17.0-1030.30 | USN-8594-1 |
| Ubuntu 24.04 LTS | linux-oracle-6.17 | 6.17.0-1019.19~24.04.3 | USN-8570-2 |
| Ubuntu 24.04 LTS | linux-riscv +13 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +32 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +28 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +14 | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.14 | No fix yet | — |
| Ubuntu Pro Realtime 24.04 LTS | linux-realtime-6.17 | 6.17.0-1018.20~24.04.1 | USN-8570-1 |
Advisories 7
- USN-8604-1 linux-azure-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 7, 2026
- USN-8669-1 linux-nvidia-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8570-1 linux-gcp-6.17, linux-realtime-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8570-2 linux-oracle-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8594-1 linux-oem-6.17 vulnerabilities Ubuntu Security Notices (USN) · Nov 6, 2026
- USN-8605-1 linux-azure-fde-6.17 vulnerabilities Ubuntu Security Notices (USN) · Oct 17, 2026
- WID-SEC-2026-0253 Linux Kernel: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Aug 23, 2026