Use-after-free in Linux kernel infiniband core driver

1) Use-after-free

EUVDB-ID: #VU92894

Risk: Low

CVSSv3.1: 7.7 [AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-48726

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the ucma_alloc_ctx(), ucma_cleanup_multicast(), ucma_process_join(), mutex_unlock() and ucma_leave_multicast() functions in drivers/infiniband/core/ucma.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/75c610212b9f1756b9384911d3a2c347eee8031c
http://git.kernel.org/stable/c/2923948ffe0835f7114e948b35bcc42bc9b3baa1
http://git.kernel.org/stable/c/ee2477e8ccd3d978eeac0dc5a981b286d9bb7b0a
http://git.kernel.org/stable/c/36e8169ec973359f671f9ec7213547059cae972e

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.