An unprivileged local user can trigger a use-after-free in the kernel, potentially leading to privilege escalation.
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Wed, 19 Aug 2026 12:30:00 +0000
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cvssV3_1
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Wed, 19 Aug 2026 11:00:00 +0000
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| First Time appeared |
Freebsd
Freebsd freebsd |
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| Vendors & Products |
Freebsd
Freebsd freebsd |
Wed, 19 Aug 2026 07:45:00 +0000
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| Description | 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. | |
| Title | Use-after-free in kqueue copy-on-fork | |
| Weaknesses | CWE-416 | |
| References |
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Projects
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Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-08-19T11:57:01.505Z
Reserved: 2026-06-29T01:40:17.498Z
Link: CVE-2026-58083
Updated: 2026-08-19T11:56:46.032Z
Status : Received
Published: 2026-08-19T08:17:12.470
Modified: 2026-08-19T12:18:33.190
Link: CVE-2026-58083
No data.
OpenCVE Enrichment
Updated: 2026-08-19T10:45:03Z