Memory Access Issues in the Linux Kernel Affecting Resource Management
CVE-2025-21804
What is CVE-2025-21804?
A vulnerability in the Linux kernel's PCI subsystem could result from the misuse of a string variable in the rcar_pcie_parse_outbound_ranges() function. This failure to correctly pass a dynamically computed resource name to the devm_request_mem_region() macro can lead to various undefined behaviors, including unpredictable errors when accessing the /proc/iomem output. In rare circumstances, a lack of a NULL-terminator in the string may cause system crashes by accessing unmapped memory above the stack. This is critical for system stability and requires prompt mitigation through the latest patches.
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Affected Version(s)
Linux 2a6d0d63d99956a66f6605832f11755d74a41951 < 7a47e14c5fb0b6dba7073be7b0119fb8fe864e01
Linux 2a6d0d63d99956a66f6605832f11755d74a41951 < 6987e021b64cbb49981d140bb72d9d1466f191c4
Linux 2a6d0d63d99956a66f6605832f11755d74a41951 < 24576899c49509c0d533bcf569139f691d8f7af7