#VU94143 Input validation error in Linux kernel - CVE-2024-26620

Vulnerability identifier: #VU94143

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-2024-26620

CWE-ID: CWE-20

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 input validation within the vfio_ap_mdev_filter_cdoms(), vfio_ap_mdev_filter_matrix(), assign_adapter_store(), assign_domain_store(), vfio_ap_mdev_probe_queue() and vfio_ap_on_cfg_changed() functions in drivers/s390/crypto/vfio_ap_ops.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/d6b8d034b576f406af920a7bee81606c027b24c6
https://git.kernel.org/stable/c/c69d821197611678533fb3eb784fc823b921349a
https://git.kernel.org/stable/c/cdd134d56138302976685e6c7bc4755450b3880e
https://git.kernel.org/stable/c/850fb7fa8c684a4c6bf0e4b6978f4ddcc5d43d11

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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.