CVE-2026-72351
Description
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.
How to fix
- Linux Linux158b9995d3c87f3b93f5c22df54a12e12a3438b3, 7c6876ec1b227261b51803f784c7be1b2242a1a0, 2c4de9988e9ddc760b750d6b6e701c35ff60ad14, 2a99224c120823987e4d829726f4ecb33e03fc1e, 61e78679c7c9ca685bff58e4b6348304dc60aafd, 4a4a1d41c6e901e773bcf795f562a47fa71f692a, f618cbe9b24cd0202004d2db781d5f80ab77037f, d335dcc6f521571d57117b8deeebc940836e5450 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c1aa8347e73e4092411fbd96cc59531fb7e76d04 ≤ v < 158b9995d3c87f3b93f5c22df54a12e12a3438b3, c1aa8347e73e4092411fbd96cc59531fb7e76d04 ≤ v < 7c6876ec1b227261b51803f784c7be1b2242a1a0, c1aa8347e73e4092411fbd96cc59531fb7e76d04 ≤ v < 2c4de9988e9ddc760b750d6b6e701c35ff60ad14, c1aa8347e73e4092411fbd96cc59531fb7e76d04 ≤ v < 2a99224c120823987e4d829726f4ecb33e03fc1e, c1aa8347e73e4092411fbd96cc59531fb7e76d04 ≤ v < 61e78679c7c9ca685bff58e4b6348304dc60aafd, c1aa8347e73e4092411fbd96cc59531fb7e76d04 ≤ v < 4a4a1d41c6e901e773bcf795f562a47fa71f692a, c1aa8347e73e4092411fbd96cc59531fb7e76d04 ≤ v < f618cbe9b24cd0202004d2db781d5f80ab77037f, c1aa8347e73e4092411fbd96cc59531fb7e76d04 ≤ v < d335dcc6f521571d57117b8deeebc940836e5450, 3.19 | 158b9995d3c87f3b93f5c22df54a12e12a3438b3, 7c6876ec1b227261b51803f784c7be1b2242a1a0, 2c4de9988e9ddc760b750d6b6e701c35ff60ad14, 2a99224c120823987e4d829726f4ecb33e03fc1e, 61e78679c7c9ca685bff58e4b6348304dc60aafd, 4a4a1d41c6e901e773bcf795f562a47fa71f692a, f618cbe9b24cd0202004d2db781d5f80ab77037f, d335dcc6f521571d57117b8deeebc940836e5450 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.