#VU104424 Use-after-free in Linux kernel - CVE-2022-49416

Vulnerability identifier: #VU104424

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-2022-49416

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 ieee80211_vif_use_reserved_context() function in net/mac80211/chan.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/265bec4779a38b65e86a25120370f200822dfa76
https://git.kernel.org/stable/c/2965c4cdf7ad9ce0796fac5e57debb9519ea721e
https://git.kernel.org/stable/c/4ba81e794f0fad6234f644c2da1ae14d5b95e1c4
https://git.kernel.org/stable/c/4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c
https://git.kernel.org/stable/c/6118bbdf69f4718b02d26bbcf2e497eb66004331
https://git.kernel.org/stable/c/82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c
https://git.kernel.org/stable/c/88cc8f963febe192d6ded9df7217f92f380b449a
https://git.kernel.org/stable/c/9f1e5cc85ad77e52f54049a94db0407445ae2a34
https://git.kernel.org/stable/c/b79110f2bf6022e60e590d2e094728a8eec3e79e

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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.