Description
In the Linux kernel, the following vulnerability has been resolved: nfc: nci: add data_len bound checks to activation parameter extractors nci_extract_activation_params_iso_dep() and nci_extract_activation_params_nfc_dep() read an inner length byte from the NCI RF_INTF_ACTIVATED_NTF payload and use it to memcpy() into fixed kernel buffers, but neither function receives the caller-validated activation_params_len. A crafted NCI notification with activation_params_len=1 and an inner length byte of up to 20 (NFC-A) or 50 (NFC-B) causes memcpy() to read that many bytes past the one valid byte in the activation params region -- a slab out-of-bounds read of kernel memory adjacent to the NCI skb. The sibling nci_extract_rf_params_*() family was given equivalent protection by commit 571dcbeb8e63 ("net: nfc: nci: Fix parameter validation for packet data"), but the two activation parameter extractors were not updated at that time. Add a data_len parameter to both functions, guard against an empty region before consuming the inner length byte, decrement the remaining count after consuming it, and clamp the copy length to what is actually available. Update both call sites to pass ntf.activation_params_len, which is already validated against the skb at ntf.c:801.
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
e8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 1168484fe2b3828bf24a46f3c42a8719fade679baffectede8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < be311c0cfeadfbe815ea22d2914a98d06e3fab0eaffectede8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 04e51353cb9fa321caaeeed8331d4cd041fbaca7affectede8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < e25b44bd8b8cc666b49a3fe0ef547e64d5b1e300affectede8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 9b01f5af0dc59263b59391b148bc78d83c0354a9affectede8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 9620a91f8d643b680f417a435db399a04d1e06d8affectede8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < cf9d44be50b9074a5abdc301b4a3ba3e283591dfaffectede8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < f5c534b53f8c424a8e7633c9b585475c4bf4ee18affectede8c0dacd9836dc2dcb28d236c9cc3cfaa9965a20 to < 0428fa2c22e2ba0cff766d3b80d461e149102045affected
Linux Linux
Default version status: affected
3.3affected0 to < 3.3unaffected5.10.269 to ≤ 5.10.*unaffected5.15.220 to ≤ 5.15.*unaffected6.1.187 to ≤ 6.1.*unaffected6.6.156 to ≤ 6.6.*unaffected6.12.108 to ≤ 6.12.*unaffected6.18.47 to ≤ 6.18.*unaffected7.1.11 to ≤ 7.1.*unaffected7.2.1 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/1168484fe2b3828bf24a46f3c42a8719fade679b ↗
- https://git.kernel.org/stable/c/be311c0cfeadfbe815ea22d2914a98d06e3fab0e ↗
- https://git.kernel.org/stable/c/04e51353cb9fa321caaeeed8331d4cd041fbaca7 ↗
- https://git.kernel.org/stable/c/e25b44bd8b8cc666b49a3fe0ef547e64d5b1e300 ↗
- https://git.kernel.org/stable/c/9b01f5af0dc59263b59391b148bc78d83c0354a9 ↗
- https://git.kernel.org/stable/c/9620a91f8d643b680f417a435db399a04d1e06d8 ↗
- https://git.kernel.org/stable/c/cf9d44be50b9074a5abdc301b4a3ba3e283591df ↗
- https://git.kernel.org/stable/c/f5c534b53f8c424a8e7633c9b585475c4bf4ee18 ↗
- https://git.kernel.org/stable/c/0428fa2c22e2ba0cff766d3b80d461e149102045 ↗