An unprivileged local user can exploit this use-after-free to escalate privileges.
Analysis and contextual insights are available on OpenCVE Cloud.
No vendor fix or workaround currently provided.
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Mon, 29 Jun 2026 13:30:00 +0000
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| Metrics |
cvssV3_1
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Sat, 27 Jun 2026 14:30:00 +0000
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| First Time appeared |
Freebsd
Freebsd freebsd |
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| Vendors & Products |
Freebsd
Freebsd freebsd |
Sat, 27 Jun 2026 09:15:00 +0000
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| Description | The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock. During this window another thread could free the multicast filter structure, leaving the handler with a stale pointer to freed memory. An unprivileged local user can exploit this use-after-free to escalate privileges. | |
| Title | Use-after-free bug in the IPV6_MSFILTER socket option handler | |
| Weaknesses | CWE-416 | |
| References |
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Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-06-29T13:06:29.989Z
Reserved: 2026-05-29T20:24:28.615Z
Link: CVE-2026-49412
Updated: 2026-06-29T13:06:20.730Z
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OpenCVE Enrichment
Updated: 2026-06-29T14:45:04Z