{"id":"CVE-2026-89776","published":"2026-09-16T09:17:07.950","lastModified":"2026-09-16T09:17:07.950","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes\n\nThe VXLAN VNI filter entry policy declares the GROUP/GROUP6 address\nattributes as NLA_BINARY with only a maximum length, so validate_nla()\naccepts a payload shorter than the address. The GROUP consumer reads it\nwith nla_get_in_addr(), an unconditional 4-byte load, so a short\nattribute over-reads up to 3 bytes of uninitialised slab data, which are\nstored into remote_ip and echoed back via RTM_GETTUNNEL, disclosing\nkernel memory.\n\nSwitch both entries to NLA_POLICY_EXACT_LEN() so the validator rejects\nany GROUP/GROUP6 that is not exactly 4 / 16 bytes; a valid address is\nalways sent at full width.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea","tags":[]},{"url":"https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e","tags":[]},{"url":"https://git.kernel.org/stable/c/a9ec10815199f9879ba080241dc555efb1daf324","tags":[]},{"url":"https://git.kernel.org/stable/c/ad32e564c62ebf5ba76dd60a22af52c69d54d17b","tags":[]},{"url":"https://git.kernel.org/stable/c/daebc7064a1b4c12c98e52c4bceede7f2fcd573c","tags":[]},{"url":"https://git.kernel.org/stable/c/e12c4663529699f457b2988c1dfedf4d13b3b3be","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}