CVE-2026-49412
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| FreeBSD | FreeBSD | 15.0-RELEASE < p10 | affected |
| FreeBSD | FreeBSD | 14.4-RELEASE < p6 | affected |
| FreeBSD | FreeBSD | 14.3-RELEASE < p15 | affected |
Weaknesses
- CWE-416: CWE-416: Use After Free
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
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