#VU92039 Improper locking in Linux kernel - CVE-2024-26837

Vulnerability identifier: #VU92039

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-26837

CWE-ID: CWE-667

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 perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the switchdev_obj_eq() and switchdev_port_obj_del() functions in net/switchdev/switchdev.c, within the br_switchdev_mdb_replay_one() and br_switchdev_mdb_replay() functions in net/bridge/br_switchdev.c. A local user can perform a denial of service (DoS) attack.

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/2d5b4b3376fa146a23917b8577064906d643925f
https://git.kernel.org/stable/c/603be95437e7fd85ba694e75918067fb9e7754db
https://git.kernel.org/stable/c/e0b4c5b1d760008f1dd18c07c35af0442e54f9c8
https://git.kernel.org/stable/c/dc489f86257cab5056e747344f17a164f63bff4b

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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.