Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a5d45bc0dc50f9dd83703510e9804d813a9cac32 before 3ee7b3f813b11f28cd6efdf7f24d64b5a7fd4dc7; affected a5d45bc0dc50f9dd83703510e9804d813a9cac32 before 8720df4504e0ed1781a702f65251bd47b3534d5e; affected a5d45bc0dc50f9dd83703510e9804d813a9cac32 before 363c3a84a946d53e5e121c9f47c7c2b7d228c46b; affected a5d45bc0dc50f9dd83703510e9804d813a9cac32 before b19b5d2e042c294e2cc1c908dc598f9d64015396; affected a5d45bc0dc50f9dd83703510e9804d813a9cac32 before a375d8ace807767f29f276b681b6324c74929b1d; affected a5d45bc0dc50f9dd83703510e9804d813a9cac32 before 16b553c46e347bc9de9946c4960654d5884a86de; affected a5d45bc0dc50f9dd83703510e9804d813a9cac32 before 630295d5bba1d0e0f494cc459452eb0a0058c545; affected a5d45bc0dc50f9dd83703510e9804d813a9cac32 before 39e88f28fb32bf02bd4b525c24c842c9cff5663d; affected 5c2b4b4f9fa5b765b927e361e3d310bcb5773015; affected 5.9.14 before 5.10 |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.
No references supplied.