CVE-2024-26583

2024-02-2100:00:00

ubuntu.com

linux kernel

cve-2024-26583

race condition

tls

privilege escalation

async crypto handler

atomic ref counter

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

5.6 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

In the Linux kernel, the following vulnerability has been resolved: tls:
fix race between async notify and socket close The submitting thread (one
which called recvmsg/sendmsg) may exit as soon as the async crypto handler
calls complete() so any code past that point risks touching already freed
data. Try to avoid the locking and extra flags altogether. Have the main
thread hold an extra reference, this way we can depend solely on the atomic
ref counter for synchronization. Don’t futz with reiniting the completion,
either, we are now tightly controlling when completion fires.

Notes

Author	Note
	Priority reason: An attacker might elevate privileges by winning the race condition.
rodrigo-zaiden	USN-6765-1 for linux-oem-6.5 wrongly stated that this CVE was fixed in version 6.5.0-1022.23. The mentioned notice was revoked and the state of the fix for linux-oem-6.5 was recovered to the previous state.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< anyUNKNOWN
ubuntu22.04noarchlinux< 5.15.0-112.122UNKNOWN
ubuntu23.10noarchlinux< 6.5.0-41.41UNKNOWN
ubuntu20.04noarchlinux-aws< anyUNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1063.69UNKNOWN
ubuntu23.10noarchlinux-aws< 6.5.0-1021.21UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1063.69~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< anyUNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu20.04noarchlinux-azure< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< any	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-112.122	UNKNOWN
ubuntu	23.10	noarch	linux	< 6.5.0-41.41	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1063.69	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< 6.5.0-1021.21	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1063.69~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< any	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< any	UNKNOWN