#VU105159 Buffer overflow in Linux kernel - CVE-2025-21804

Vulnerability identifier: #VU105159

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-2025-21804

CWE-ID: CWE-119

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 memory corruption within the rcar_pcie_parse_outbound_ranges() function in drivers/pci/controller/pcie-rcar-ep.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12 - 6.12.12

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External links
https://git.kernel.org/stable/c/24576899c49509c0d533bcf569139f691d8f7af7
https://git.kernel.org/stable/c/2c54b9fca1755e80a343ccfde0652dc5ea4744b2
https://git.kernel.org/stable/c/2d2da5a4c1b4509f6f7e5a8db015cd420144beb4
https://git.kernel.org/stable/c/44708208c2a4b828a57a2abe7799c9d3962e7eaa
https://git.kernel.org/stable/c/9ff46b0bfeb6e0724a4ace015aa7a0b887cdb7c1
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.13

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?