Description
A heap out-of-bounds write vulnerability in the Linux kernel's Performance Events system component can be exploited to achieve local privilege escalation. A perf_event's read_size can overflow, leading to an heap out-of-bounds increment or write in perf_read_group(). We recommend upgrading past commit 382c27f4ed28f803b1f1473ac2d8db0afc795a1b.
Affected products
linux: linux kernel; debian: debian linux
References10
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit… Mailing ListPatch
- kernel.dance/382c27f4ed28f803b1f1473ac2d8db0afc795a1b Patch
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit… Mailing ListPatch
- kernel.dance/382c27f4ed28f803b1f1473ac2d8db0afc795a1b Patch
- lists.debian.org/debian-lts-announce/2024/01/msg00004.html Mailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2024/01/msg00005.html Mailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2024/01/msg00004.html Mailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2024/01/msg00005.html Mailing ListThird Party Advisory
- cert-portal.siemens.com/productcert/html/ssa-265688.html
- cert-portal.siemens.com/productcert/html/ssa-398330.html
Metrics
- CVSS 3.1
-
7.0
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 54 · as of 5 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.