8.8

CVE-2026-49427

posixshm: largepage shared memory objects not explicitly wired

Pages belonging to largepage shared memory objects were not explicitly wired.  When sendfile(2) transmitted such an object with the SF_NOCACHE flag, it freed the underlying pages after transmission even though existing mappings still referred to them.

An unprivileged local user can abuse the bug to access freed kernel memory.  This can be exploited to escalate privileges.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Freebsd ≫ Freebsd Version 14.3 Update -
Freebsd ≫ Freebsd Version 14.3 Update p1
Freebsd ≫ Freebsd Version 14.3 Update p10
Freebsd ≫ Freebsd Version 14.3 Update p11
Freebsd ≫ Freebsd Version 14.3 Update p12
Freebsd ≫ Freebsd Version 14.3 Update p13
Freebsd ≫ Freebsd Version 14.3 Update p14
Freebsd ≫ Freebsd Version 14.3 Update p15
Freebsd ≫ Freebsd Version 14.3 Update p2
Freebsd ≫ Freebsd Version 14.3 Update p3
Freebsd ≫ Freebsd Version 14.3 Update p4
Freebsd ≫ Freebsd Version 14.3 Update p5
Freebsd ≫ Freebsd Version 14.3 Update p6
Freebsd ≫ Freebsd Version 14.3 Update p7
Freebsd ≫ Freebsd Version 14.3 Update p8
Freebsd ≫ Freebsd Version 14.3 Update p9
Freebsd ≫ Freebsd Version 14.4 Update -
Freebsd ≫ Freebsd Version 14.4 Update p1
Freebsd ≫ Freebsd Version 14.4 Update p2
Freebsd ≫ Freebsd Version 14.4 Update p3
Freebsd ≫ Freebsd Version 14.4 Update p4
Freebsd ≫ Freebsd Version 14.4 Update p5
Freebsd ≫ Freebsd Version 14.4 Update p6
Freebsd ≫ Freebsd Version 14.4 Update rc1
Freebsd ≫ Freebsd Version 15.0 Update -
Freebsd ≫ Freebsd Version 15.0 Update p1
Freebsd ≫ Freebsd Version 15.0 Update p10
Freebsd ≫ Freebsd Version 15.0 Update p2
Freebsd ≫ Freebsd Version 15.0 Update p3
Freebsd ≫ Freebsd Version 15.0 Update p4
Freebsd ≫ Freebsd Version 15.0 Update p5
Freebsd ≫ Freebsd Version 15.0 Update p6
Freebsd ≫ Freebsd Version 15.0 Update p7
Freebsd ≫ Freebsd Version 15.0 Update p8
Freebsd ≫ Freebsd Version 15.0 Update p9
Freebsd ≫ Freebsd Version 15.1 Update -
Freebsd ≫ Freebsd Version 15.1 Update rc2
Freebsd ≫ Freebsd Version 15.1 Update rc3-p1
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.34% 0.271
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CISA-ADP 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-826 Premature Release of Resource During Expected Lifetime

The product releases a resource that is still intended to be used by itself or another actor.

https://security.freebsd.org/advisories/FreeBSD-SA-26:44.posixshm.asc
Vendor Advisory