Improper locking in Linux kernel xen driver

1) Improper locking

EUVDB-ID: #VU96862

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-2024-44957

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the DEFINE_MUTEX(), irqfd_wakeup(), irqfd_poll_func(), privcmd_irqfd_assign(), privcmd_irqfd_deassign() and privcmd_irqfd_init() functions in drivers/xen/privcmd.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

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/c2775ae4d9227729f8ca9ee2a068f62a00d5ea9c
https://git.kernel.org/stable/c/49f2a5da6785b2dbde93e291cae037662440346e
https://git.kernel.org/stable/c/1c682593096a487fd9aebc079a307ff7a6d054a3

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.