CVE-2023-4622

2023-09-0600:00:00

ubuntu.com

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

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 af_unix component can
be exploited to achieve local privilege escalation. The
unix_stream_sendpage() function tries to add data to the last skb in the
peer’s recv queue without locking the queue. Thus there is a race where
unix_stream_sendpage() could access an skb locklessly that is being
released by garbage collection, resulting in use-after-free. We recommend
upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.

Bugs

Notes

Author	Note
	Priority reason: Allows local privilege escalation

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-219.230) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux< 5.4.0-165.182UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-87.97UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-35.35UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-246.280) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1162.175) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1112.121UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1048.53UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1014.14UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1124.130) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-219.230) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-165.182	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-87.97	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-35.35	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-246.280) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1162.175) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1112.121	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1048.53	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1014.14	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1124.130) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN