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CVE-2026-49412General(freebsd / freebsd)

LOWCVSS 7.8 · HIGH

Signal is active with 3 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-416

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • freebsd

Threat summary

  • 3 mentions across 1 observed day

What's happening

  • Technical details provided in 3 signals
  • General: 2 classified signals
  • Disclosure: 1 classified signal
  • 3 total mentions across 1 day

Affected systems

Vendors
freebsd
Products
freebsd

3 versions affected across 1 product

Deep dive

Activity timeline3 mentions / 1d
01223Mentions · 2026-06-27: 3Technical Details · 2026-06-27: 306-27
Signal classification2 categories
General
266.7%
Disclosure
133.3%
Referenced assets3 URLs
Full discourse3 posts
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-49412 Use-After-Free Vulnerability in IPV6_MSFILTER Kernel Handler Local Privilege Escalation https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-49412

    Post summary

    CVE‑2026‑49412 describes a use‑after‑free flaw in the IPV6_MSFILTER kernel handler that could allow local privilege escalation; no proof‑of‑concept, exploit code, active exploitation, or patch information is provided.

    00010129
    4.1K followersView on X
  • Infoflowcloud@infoflowcloud
    General

    🚨*CVE* CVE-2026-49412 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 … https://www.cve.org/CVERecord?id=CVE-2026-49412 ----- Traducción: CVE-2026-49412 El … http://infoflow.cloud`

    Post summary

    The text provides a brief technical overview of CVE-2026-49412, highlighting a kernel lock ordering issue, but does not mention a PoC, exploit code, active attacks, or mitigation.

    0000028
    89 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-49412 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 … https://www.cve.org/CVERecord?id=CVE-2026-49412

    Post summary

    The text details a race condition in kernel IPV6_MSFILTER handling but provides no proof of exploitation, patch information, or real‑world attack evidence.

    00000807
    57.7K followersView on X
CPE platform detail31 entries

31 of 31 entries

PartVendorProductVersionTarget SWTarget HW
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--

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