#VU91062 Use-after-free in Linux kernel - CVE-2024-26957

Vulnerability identifier: #VU91062

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-2024-26957

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 zcrypt_pick_queue() and zcrypt_drop_queue() functions in drivers/s390/crypto/zcrypt_api.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/7e500849fa558879a1cde43f80c7c048c2437058
https://git.kernel.org/stable/c/9daddee03de3f231012014dab8ab2b277a116a55
https://git.kernel.org/stable/c/6470078ab3d8f222115e11c4ec67351f3031b3dd
https://git.kernel.org/stable/c/a55677878b93e9ebc31f66d0e2fb93be5e7836a6
https://git.kernel.org/stable/c/b7f6c3630eb3f103115ab0d7613588064f665d0d
https://git.kernel.org/stable/c/a64ab862e84e3e698cd351a87cdb504c7fc575ca
https://git.kernel.org/stable/c/befb7f889594d23e1b475720cf93efd2f77df000
https://git.kernel.org/stable/c/394b6d8bbdf9ddee6d5bcf3e1f3e9f23eecd6484
https://git.kernel.org/stable/c/50ed48c80fecbe17218afed4f8bed005c802976c

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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.