#VU104983 Out-of-bounds read in Linux kernel - CVE-2025-21789
Vulnerability identifier: #VU104983
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-2025-21789
CWE-ID:
CWE-125
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 an out-of-bounds read error within the do_csum() function in arch/loongarch/lib/csum.c. A local user can perform a denial of service (DoS) attack.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 6.13, 6.13.1, 6.13.2, 6.13.3
External links
https://git.kernel.org/stable/c/6287f1a8c16138c2ec750953e35039634018c84a
https://git.kernel.org/stable/c/964a8895704a22efc06a2a3276b624a5ae985a06
https://git.kernel.org/stable/c/9f15a8df542c0f08732a67d1a14ee7c22948fb97
https://git.kernel.org/stable/c/d6508ffff32b44b6d0de06704034e4eef1c307a7
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.4
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.
