#VU94221 Use-after-free in Linux kernel - CVE-2024-40920

Vulnerability identifier: #VU94221

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-2024-40920

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 br_mst_set_state() function in net/bridge/br_mst.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/caaa2129784a04dcade0ea92c12e6ff90bbd23d8
https://git.kernel.org/stable/c/7caefa2771722e65496d85b62e1dc4442b7d1345
https://git.kernel.org/stable/c/406bfc04b01ee47e4c626f77ecc7d9f85135b166
https://git.kernel.org/stable/c/546ceb1dfdac866648ec959cbc71d9525bd73462

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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.