CVE-2023-6931

2023-12-1900:00:00

ubuntu.com

linux kernel

heap out-of-bounds

local privilege escalation

perf_event

vulnerability

upgrade

bugzilla

4.4 kernels

perf_event_open

software events

lockdep fix

7.9 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.2%

JSON

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.

Bugs

Notes

Author	Note
	Priority reason: On 4.4 kernels, it is still possible to use perf_event_open by default for software events.
sbeattie	7e2c1e4b34f0 (“perf: Fix perf_event_validate_size() lockdep splat”) is a followup lockdep fix for 382c27f4ed28 (“perf: Fix perf_event_validate_size()”)

OSVersionArchitecturePackageVersionFilename
ubuntu16.04noarchlinux-hwe< 4.15.0-221.232~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-hwe-5.4< 5.4.0-170.188~18.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-hwe-5.15< 5.15.0-92.102~20.04.1UNKNOWN
ubuntu14.04noarchlinux-lts-xenial< 4.4.0-250.284~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-kvm< 5.4.0-1105.112UNKNOWN
ubuntu22.04noarchlinux-kvm< 5.15.0-1049.54UNKNOWN
ubuntu18.04noarchlinux-kvm< 4.15.0-1148.153) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-kvm< 4.4.0-1128.138) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1117.127~18.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1052.57~20.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	16.04	noarch	linux-hwe	< 4.15.0-221.232~16.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-hwe-5.4	< 5.4.0-170.188~18.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-hwe-5.15	< 5.15.0-92.102~20.04.1	UNKNOWN
ubuntu	14.04	noarch	linux-lts-xenial	< 4.4.0-250.284~14.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-kvm	< 5.4.0-1105.112	UNKNOWN
ubuntu	22.04	noarch	linux-kvm	< 5.15.0-1049.54	UNKNOWN
ubuntu	18.04	noarch	linux-kvm	< 4.15.0-1148.153) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	linux-kvm	< 4.4.0-1128.138) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1117.127~18.04.1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1052.57~20.04.1	UNKNOWN