Linux Kernel Vulnerability in Network Protocol Implementation
CVE-2025-39827
What is CVE-2025-39827?
A vulnerability in the Linux kernel's network protocol handling has been identified, concerning improper reference counting within the rose_neigh structure. The current implementation separates reference tracking into two mechanisms which could lead to inaccurate reference management. This patch merges the 'count' and 'use' fields into a single reference counting system to enhance memory management. By ensuring that rose_neigh structures are properly freed only when all references are released, this update addresses the slab-use-after-free issue previously reported, significantly improving system stability and security.
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Affected Version(s)
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4cce478c3e82a5fc788d72adb2f4c4e983997639
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9c547c8eee9d1cf6e744611d688b9f725cf9a115
Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2