8.4
CVE-2026-58083
- EPSS 0.17%
- Veröffentlicht 19.08.2026 07:28:28
- Zuletzt bearbeitet 31.08.2026 19:02:30
- Erkennungen
Use-after-free in kqueue copy-on-fork
While the kernel was copying knotes during fork, a knote with a timer-based filter could fire and be enqueued on the kqueue's active list before the copy was complete. The copy routine did not account for this and could enqueue the new knote a second time, corrupting the active list. In addition, the copy routine did not hold the appropriate locks while reading knote state, allowing further races. An unprivileged local user can trigger a use-after-free in the kernel, potentially leading to privilege escalation.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
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Login| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.17% | 0.065 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| CISA-ADP | 8.4 | 2.5 | 5.9 |
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
CWE-416 Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
https://security.freebsd.org/advisories/FreeBSD-SA-26:50.kqueue.asc