CVE-2026-31630

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> rxrpc: proc: size address buffers for %pISpc output<br /> <br /> The AF_RXRPC procfs helpers format local and remote socket addresses into<br /> fixed 50-byte stack buffers with "%pISpc".<br /> <br /> That is too small for the longest current-tree IPv6-with-port form the<br /> formatter can produce. In lib/vsprintf.c, the compressed IPv6 path uses a<br /> dotted-quad tail not only for v4mapped addresses, but also for ISATAP<br /> addresses via ipv6_addr_is_isatap().<br /> <br /> As a result, a case such as<br /> <br /> [ffff:ffff:ffff:ffff:0:5efe:255.255.255.255]:65535<br /> <br /> is possible with the current formatter. That is 50 visible characters, so<br /> 51 bytes including the trailing NUL, which does not fit in the existing<br /> char[50] buffers used by net/rxrpc/proc.c.<br /> <br /> Size the buffers from the formatter&amp;#39;s maximum textual form and switch the<br /> call sites to scnprintf().<br /> <br /> Changes since v1:<br /> - correct the changelog to cite the actual maximum current-tree case<br /> explicitly<br /> - frame the proof around the ISATAP formatting path instead of the earlier<br /> mapped-v4 example