CVE-2026-49412

highpriority · track · 0EPSS 0.002 · 4 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.15% (4th) EPSS

CVSS 7.8 · high

Is it mine?

24 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 1.8 · impact 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USCWE-416US

affected products (24)

Products and version ranges known to be affected.

FreeBSD Project FreeBSD OS <14.3all versionscert_bundDE
FreeBSD Project FreeBSD OS <14.4all versionscert_bundDE
FreeBSD Project FreeBSD OS <15.0all versionscert_bundDE
FreeBSD Project FreeBSD OS <15.1all versionscert_bundDE
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
FreeBSD Project FreeBSD OS< 14.3cert_bundDE
FreeBSD Project FreeBSD OS< 14.4cert_bundDE
FreeBSD Project FreeBSD OS< 15.0cert_bundDE
FreeBSD Project FreeBSD OS< 15.1cert_bundDE
FreeBSD FreeBSD14.3-RELEASE → p15enisa_euvdEU
FreeBSD FreeBSD14.4-RELEASE → p6enisa_euvdEU
FreeBSD FreeBSD15.0-RELEASE → p10enisa_euvdEU
FreeBSD Project FreeBSD≤ 15.1-RC3-p1fstec_bduRU
FreeBSD Project FreeBSD≤ 15.1-STABLEfstec_bduRU
FreeBSD Project FreeBSD≤ 14.4-STABLEfstec_bduRU
FreeBSD Project FreeBSD≤ 14.3-RELEASE-p15fstec_bduRU
FreeBSD Project FreeBSD≤ 14.4-RELEASE-p6fstec_bduRU

showing 20 of 24

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1871FreeBSD Project FreeBSD OS: Mehrere SchwachstellenDeutsch2026-06-09csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in FreeBSD Project FreeBSD OS ausnutzen, um erweiterte Rechte zu erlangen – möglicherweise sogar Administratorrechte –, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder andere, nicht näher definierte Angriffe durchzuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2026-06-27modified 2026-08-10

references (3)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan