Use-after-free in Linux kernel io_uring



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2024-39508
CWE-ID CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU94229

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-2024-39508

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

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 WORKER_IDLE_TIMEOUT(), io_work_get_acct(), io_worker_exit(), io_wq_dec_running(), __io_worker_busy(), io_wq_worker(), io_wq_worker_running(), io_wq_worker_sleeping(), io_init_new_worker(), init_completion() and io_wq_work_match_item() functions in io_uring/io-wq.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.6 - 6.6.34

CPE2.3 External links

https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0
https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf
https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.35


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.



###SIDEBAR###