Use-after-free in Linux kernel core

1) Use-after-free

EUVDB-ID: #VU104472

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-2022-49093

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 skb_try_coalesce() function in net/core/skbuff.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/1effe8ca4e34c34cdd9318436a4232dcb582ebf4
https://git.kernel.org/stable/c/72bb856d16e883437023ff2ff77d0c498018728a
https://git.kernel.org/stable/c/ba965e8605aee5387cecaa28fcf7ee9f61779a49
https://git.kernel.org/stable/c/c4fa19615806a9a7e518c295b39175aa47a685ac

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.