CVE-2023-42756

2023-09-2800:00:00

ubuntu.com

netfilter subsystem

linux kernel

race condition

ipset_cmd_add

ipset_cmd_swap

kernel panic

local user

system crash

denial of service

code execution

4.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.0004 Low

EPSS

Percentile

5.1%

JSON

A flaw was found in the Netfilter subsystem of the Linux kernel. A race
condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel
panic due to the invocation of __ip_set_put on a wrong set. This issue
may allow a local user to crash the system.

Bugs

Notes

Author	Note
	Priority reason: By using unprivileged user namespaces, this can be exploited to achieve denial of service or code execution.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< 5.4.0-165.182UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-87.97UNKNOWN
ubuntu23.04noarchlinux< 6.2.0-35.35UNKNOWN
ubuntu23.10noarchlinux< 6.5.0-10.10UNKNOWN
ubuntu24.04noarchlinux< anyUNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1112.121UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1048.53UNKNOWN
ubuntu23.04noarchlinux-aws< 6.2.0-1014.14UNKNOWN
ubuntu23.10noarchlinux-aws< 6.5.0-1009.9UNKNOWN
ubuntu24.04noarchlinux-aws< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
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	23.10	noarch	linux	< 6.5.0-10.10	UNKNOWN
ubuntu	24.04	noarch	linux	< any	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	23.10	noarch	linux-aws	< 6.5.0-1009.9	UNKNOWN
ubuntu	24.04	noarch	linux-aws	< any	UNKNOWN