CVE-2026-49412

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 99% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cisa-adp, epss
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
1.2%
KEV
Not listed

Published

June 27, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Jun 29, 2026
No patch confirmed yet.
generic
https://security.freebsd.org/advisories/FreeBSD-SA-26:29.ip6_multicast.asc

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 53× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 19:21 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 07:59 UTCEG score recompute
  5. 2026-07-14 20:37 UTCEG score recompute
  6. 2026-07-14 09:12 UTCEG score recompute
  7. 2026-07-13 22:30 UTCEPSS rescore
  8. 2026-07-13 21:51 UTCEG score recompute
  9. 2026-07-13 10:29 UTCEG score recompute
  10. 2026-07-12 23:07 UTCEG score recompute
  11. 2026-07-12 11:46 UTCEG score recompute
  12. 2026-07-12 05:46 UTCEPSS rescore
  13. 2026-07-12 00:24 UTCEG score recompute
  14. 2026-07-11 13:02 UTCEG score recompute
  15. 2026-07-11 01:40 UTCEG score recompute
  16. 2026-07-10 14:15 UTCEG score recompute
  17. 2026-07-10 02:45 UTCEG score recompute
  18. 2026-07-09 19:10 UTCEPSS rescore
  19. 2026-07-09 15:17 UTCEG score recompute
  20. 2026-07-09 03:56 UTCEG score recompute
  21. 2026-07-08 16:34 UTCEG score recompute
  22. 2026-07-08 05:12 UTCEG score recompute
  23. 2026-07-07 17:49 UTCEG score recompute
  24. 2026-07-07 13:46 UTCEPSS rescore
  25. 2026-07-07 06:16 UTCEG score recompute
Show 28 more
  1. 2026-07-06 18:54 UTCEG score recompute
  2. 2026-07-06 07:27 UTCEG score recompute
  3. 2026-07-05 20:03 UTCEG score recompute
  4. 2026-07-05 08:40 UTCEG score recompute
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-04 21:18 UTCEG score recompute
  7. 2026-07-04 09:55 UTCEG score recompute
  8. 2026-07-04 06:31 UTCEPSS rescore
  9. 2026-07-03 22:33 UTCEG score recompute
  10. 2026-07-03 11:10 UTCEG score recompute
  11. 2026-07-02 23:48 UTCEG score recompute
  12. 2026-07-02 12:27 UTCEG score recompute
  13. 2026-07-02 01:05 UTCEG score recompute
  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-07-01 13:43 UTCEG score recompute
  16. 2026-07-01 02:22 UTCEG score recompute
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 15:00 UTCEG score recompute
  19. 2026-06-30 03:39 UTCEG score recompute▲ 7.80
  20. 2026-06-29 14:06 UTCEPSS rescore
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 13:32 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
  26. 2026-06-27 09:36 UTCNVD update
  27. 2026-06-27 09:15 UTCEG score recompute
  28. 2026-06-27 09:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49412?
CVE-2026-49412 is a high vulnerability published on June 27, 2026. 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…
When was CVE-2026-49412 disclosed?
CVE-2026-49412 was first published in the National Vulnerability Database on June 27, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49412 actively exploited?
CVE-2026-49412 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49412?
CVE-2026-49412 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-49412?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49412, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-49412

Explore →

Is Your Infrastructure Affected by CVE-2026-49412?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs