CVE-2026-72450

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: validate selector family and prefixlen during match syzbot reported a shift-out-of-bounds in xfrm_selector_match() due to AF_UNSPEC selector with large prefixlen (e.g. 128) matched against IPv4 flow (when XFRM_STATE_AF_UNSPEC is set). Fix this by: - Rejecting mismatched families in xfrm_selector_match. - Returning false in addr4_match if prefixlen > 32. - Returning false in addr_match if prefixlen > 128 (prevents overflow).

References

• https://git.kernel.org/stable/c/40f0b1047918539f0b0f795ac65e35336b4c2c78
• https://git.kernel.org/stable/c/5a03a2ee17e8259dde631ed84fd8322db06cb2ae
• https://git.kernel.org/stable/c/6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe
• https://git.kernel.org/stable/c/78783fefdc8f36879b1a17efa0d3195ea5f2dc5f
• https://git.kernel.org/stable/c/87a5bbccc7ff4edb3f42fea387124237d2ba91ee