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Ubuntu.comUB:CVE-2023-6932

HistoryDec 19, 2023 - 12:00 a.m.

CVE-2023-6932

2023-12-1900:00:00

ubuntu.com

linux kernel

use-after-free

local privilege escalation

ipv4

igmp

race condition

rcu

bugzilla

unprivileged user namespaces

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

6.8 Medium

AI Score

Confidence

High

3.5 Low

CVSS2

Access Vector

LOCAL

Access Complexity

HIGH

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:H/Au:S/C:P/I:P/A:P

0.0004 Low

EPSS

Percentile

5.2%

JSON

A use-after-free vulnerability in the Linux kernel’s ipv4: igmp component
can be exploited to achieve local privilege escalation. A race condition
can be exploited to cause a timer be mistakenly registered on a RCU read
locked object which is freed by another thread. We recommend upgrading past
commit e2b706c691905fe78468c361aaabc719d0a496f1.

Bugs

Notes

Author	Note
	Priority reason: By using unprivileged user namespaces, this can be exploited to achieve local privilege escalation.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-221.232) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux< 5.4.0-170.188UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-92.102UNKNOWN
ubuntu23.10noarchlinux< 6.5.0-15.15UNKNOWN
ubuntu24.04noarchlinux< anyUNKNOWN
ubuntu14.04noarchlinux< 3.13.0-195.246) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux< 4.4.0-250.284) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1164.177) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1117.127UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1052.57UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-221.232) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-170.188	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-92.102	UNKNOWN
ubuntu	23.10	noarch	linux	< 6.5.0-15.15	UNKNOWN
ubuntu	24.04	noarch	linux	< any	UNKNOWN
ubuntu	14.04	noarch	linux	< 3.13.0-195.246) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-250.284) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1164.177) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1117.127	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1052.57	UNKNOWN