Race condition in Linux kernel ipv4



| Updated: 2025-05-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-21719
CWE-ID CWE-362
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) Race condition

EUVDB-ID: #VU105081

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-2025-21719

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition within the list_for_each_entry() function in net/ipv4/ipmr_base.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.6 - 6.6.75

CPE2.3 External links

https://git.kernel.org/stable/c/15a901361ec3fb1c393f91880e1cbf24ec0a88bd
https://git.kernel.org/stable/c/26bb7d991f04eeef47dfad23e533834995c26f7a
https://git.kernel.org/stable/c/57177c5f47a8da852f8d76cf6945cf803f8bb9e5
https://git.kernel.org/stable/c/a099834a51ccf9bbba3de86a251b3433539abfde
https://git.kernel.org/stable/c/b379b3162ff55a70464c6a934ae9bf0497478a62
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.76


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.



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