CVE-2026-72351
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
gue: validate REMCSUM private option length
GUE private flags can indicate that remote checksum offload metadata is
present. The private flags field itself is accounted for by
guehdr_flags_len(), but guehdr_priv_flags_len() currently returns 0 even
when GUE_PFLAG_REMCSUM is set.
This lets a packet with only the private flags field pass
validate_gue_flags(), after which gue_remcsum() and gue_gro_remcsum()
read the missing REMCSUM start/offset fields from the following bytes.
Account for GUE_PLEN_REMCSUM when GUE_PFLAG_REMCSUM is present so that
malformed packets are rejected during option validation.
https://git.kernel.org/stable/c/158b9995d3c87f3b93f5c22df54a12e12a3438b3
https://git.kernel.org/stable/c/2a99224c120823987e4d829726f4ecb33e03fc1e
https://git.kernel.org/stable/c/2c4de9988e9ddc760b750d6b6e701c35ff60ad14
https://git.kernel.org/stable/c/4a4a1d41c6e901e773bcf795f562a47fa71f692a
https://git.kernel.org/stable/c/61e78679c7c9ca685bff58e4b6348304dc60aafd
https://git.kernel.org/stable/c/7c6876ec1b227261b51803f784c7be1b2242a1a0
https://git.kernel.org/stable/c/d335dcc6f521571d57117b8deeebc940836e5450
https://git.kernel.org/stable/c/f618cbe9b24cd0202004d2db781d5f80ab77037f