Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_payload: fix mask build for partial field offload nft_payload_offload_mask() builds the offload match mask for a payload expression that covers only part of a header field. For a partial IPv6 address match (field_len = 16, priv_len = 1) that shift is 1 << 120, which is undefined on the 32-bit int operand. It also trims only one word, so the remaining words stay 0xffffffff (and when priv_len is a multiple of 4 the trim is skipped entirely), leaving the mask covering more bytes than the rule matches. UBSAN: shift-out-of-bounds in net/netfilter/nft_payload.c:278:20 shift exponent 120 is too large for 32-bit type 'int' ... The match is byte-granular and struct nft_data is zero-initialised, so the correct mask is simply the first priv_len bytes set to 0xff. Set those bytes directly and drop the word/shift trimming; this removes the undefined shift and no longer over-masks the trailing bytes.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a5d45bc0dc50f9dd83703510e9804d813a9cac32 to < 3ee7b3f813b11f28cd6efdf7f24d64b5a7fd4dc7affecteda5d45bc0dc50f9dd83703510e9804d813a9cac32 to < 8720df4504e0ed1781a702f65251bd47b3534d5eaffecteda5d45bc0dc50f9dd83703510e9804d813a9cac32 to < 363c3a84a946d53e5e121c9f47c7c2b7d228c46baffecteda5d45bc0dc50f9dd83703510e9804d813a9cac32 to < b19b5d2e042c294e2cc1c908dc598f9d64015396affecteda5d45bc0dc50f9dd83703510e9804d813a9cac32 to < a375d8ace807767f29f276b681b6324c74929b1daffecteda5d45bc0dc50f9dd83703510e9804d813a9cac32 to < 16b553c46e347bc9de9946c4960654d5884a86deaffecteda5d45bc0dc50f9dd83703510e9804d813a9cac32 to < 630295d5bba1d0e0f494cc459452eb0a0058c545affecteda5d45bc0dc50f9dd83703510e9804d813a9cac32 to < 39e88f28fb32bf02bd4b525c24c842c9cff5663daffected5c2b4b4f9fa5b765b927e361e3d310bcb5773015affected5.9.14 to < 5.10affected
Linux Linux
Default version status: affected
5.10affected0 to < 5.10unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.151 to ≤ 6.6.*unaffected6.12.103 to ≤ 6.12.*unaffected6.18.44 to ≤ 6.18.*unaffected7.1.8 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3ee7b3f813b11f28cd6efdf7f24d64b5a7fd4dc7 ↗
- https://git.kernel.org/stable/c/8720df4504e0ed1781a702f65251bd47b3534d5e ↗
- https://git.kernel.org/stable/c/363c3a84a946d53e5e121c9f47c7c2b7d228c46b ↗
- https://git.kernel.org/stable/c/b19b5d2e042c294e2cc1c908dc598f9d64015396 ↗
- https://git.kernel.org/stable/c/a375d8ace807767f29f276b681b6324c74929b1d ↗
- https://git.kernel.org/stable/c/16b553c46e347bc9de9946c4960654d5884a86de ↗
- https://git.kernel.org/stable/c/630295d5bba1d0e0f494cc459452eb0a0058c545 ↗
- https://git.kernel.org/stable/c/39e88f28fb32bf02bd4b525c24c842c9cff5663d ↗