#VU104460 Use-after-free in Linux kernel - CVE-2022-49236

Vulnerability identifier: #VU104460

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-2022-49236

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 btf_id_set_contains(), btf_module_notify() and btf_try_get_module() functions in kernel/bpf/btf.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/0481baa2318cb1ab13277715da6cdbb657807b3f
https://git.kernel.org/stable/c/18688de203b47e5d8d9d0953385bf30b5949324f
https://git.kernel.org/stable/c/51b82141fffa454abf937a8ff0b8af89e4fd0c8f
https://git.kernel.org/stable/c/d7fccf264b1a785525b366a5b7f8113c756187ad

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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.