CVE-2023-4569

2023-08-2800:00:00

ubuntu.com

memory leak

nft_set_catchall_flush

local privilege escalation

linux kernel

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

5.1%

JSON

A memory leak flaw was found in nft_set_catchall_flush in
net/netfilter/nf_tables_api.c in the Linux Kernel. This issue may allow a
local attacker to cause double-deactivations of catchall elements, which
can result in a memory leak.

Bugs

Notes

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

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-84.93UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-33.33UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1045.50UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1012.12UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1045.50~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.2< 6.2.0-1012.12~22.04.1UNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1047.54UNKNOWN
ubuntu23.04noarchlinux-azure< 6.2.0-1012.12UNKNOWN
ubuntu20.04noarchlinux-azure-5.15< 5.15.0-1047.54~20.04.1UNKNOWN
ubuntu22.04noarchlinux-azure-6.2< 6.2.0-1012.12~22.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-84.93	UNKNOWN
ubuntu	23.04	noarch	linux	< 6.2.0-33.33	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1045.50	UNKNOWN
ubuntu	23.04	noarch	linux-aws	< 6.2.0-1012.12	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1045.50~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.2	< 6.2.0-1012.12~22.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1047.54	UNKNOWN
ubuntu	23.04	noarch	linux-azure	< 6.2.0-1012.12	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.15	< 5.15.0-1047.54~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure-6.2	< 6.2.0-1012.12~22.04.1	UNKNOWN