Improper locking in Linux kernel io_uring

1) Improper locking

EUVDB-ID: #VU92022

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-2024-35880

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 __io_remove_buffers() and io_unregister_pbuf_ring() functions in io_uring/kbuf.c, within the io_uring_validate_mmap_request() function in io_uring/io_uring.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/65938e81df2197203bda4b9a0c477e7987218d66
https://git.kernel.org/stable/c/5fd8e2359498043e0b5329a05f02d10a9eb91eb9
https://git.kernel.org/stable/c/561e4f9451d65fc2f7eef564e0064373e3019793
https://www.zerodayinitiative.com/advisories/ZDI-24-1018/

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.