CVE-2026-31630

A flaw was found in the Linux kernel, specifically within the rxrpc component. The AF_RXRPC procfs helpers use fixed-size buffers to format local and remote socket addresses. When processing certain IPv6 addresses with ports, the formatted string can exceed the buffer's capacity, leading to a buffer overflow. This memory corruption vulnerability can cause system instability or a denial of service (DoS).

AF_RXRPC procfs formatting used undersized buffers for %pISpc; upstream sizes buffers to match seq_file limits. Red Hat recommends patched kernels for rxrpc debugging interfaces.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.