CVE-2024-26598

2024-02-2300:00:00

ubuntu.com

linux kernel

kvm

uaf vulnerability

arm64

lpi translation cache

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.4 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

In the Linux kernel, the following vulnerability has been resolved: KVM:
arm64: vgic-its: Avoid potential UAF in LPI translation cache There is a
potential UAF scenario in the case of an LPI translation cache hit racing
with an operation that invalidates the cache, such as a DISCARD ITS
command. The root of the problem is that vgic_its_check_cache() does not
elevate the refcount on the vgic_irq before dropping the lock that
serializes refcount changes. Have vgic_its_check_cache() raise the refcount
on the returned vgic_irq and add the corresponding decrement after queueing
the interrupt.

Notes

Author	Note
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 The mentioned notice was revoked and the state of the fix for linux-oem-6.5 was recovered to the previous state.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< 5.4.0-181.201UNKNOWN
ubuntu22.04noarchlinux< 5.15.0-102.112UNKNOWN
ubuntu23.10noarchlinux< 6.5.0-41.41UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1124.134UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1057.63UNKNOWN
ubuntu23.10noarchlinux-aws< 6.5.0-1021.21UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1057.63~20.04.1UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1124.134~18.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1129.136UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< 5.4.0-181.201	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-102.112	UNKNOWN
ubuntu	23.10	noarch	linux	< 6.5.0-41.41	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1124.134	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1057.63	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< 6.5.0-1021.21	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1057.63~20.04.1	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1124.134~18.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< 5.4.0-1129.136	UNKNOWN