#VU96412 Use-after-free in Linux kernel - CVE-2022-48913

Vulnerability identifier: #VU96412

Vulnerability 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-2022-48913

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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 local_irq_restore(), put_probe_ref(), __blk_trace_remove(), do_blk_trace_setup(), blk_trace_remove_queue() and blk_trace_setup_queue() functions in kernel/trace/blktrace.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/78acc7dbd84a8c173a08584750845c31611160f2
https://git.kernel.org/stable/c/6418634238ade86f2b08192928787f39d8afb58c
https://git.kernel.org/stable/c/30939293262eb433c960c4532a0d59c4073b2b84

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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.