Use-after-free in Linux kernel block

1) Use-after-free

EUVDB-ID: #VU104413

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49413

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 bfq_bio_merge() function in block/bfq-iosched.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

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/2a1077f17169a6059992a0bbdb330e0abad1e6d9
https://git.kernel.org/stable/c/b06691af08b41dfd81052a3362514d9827b44bb1
https://git.kernel.org/stable/c/d9165200c5627a2cf4408eefabdf0058bdf95e1a
https://git.kernel.org/stable/c/da9f3025d595956410ceaab2bea01980d7775948
https://git.kernel.org/stable/c/e8821f45612f2e6d9adb9c6ba0fb4184f57692aa
https://git.kernel.org/stable/c/ea591cd4eb270393810e7be01feb8fde6a34fbbe

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.