Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: clamp assoc request/response lengths before subtracting IE offsets ath6kl_cfg80211_connect_event() subtracts fixed IE offsets from assoc_req_len (-= 4) and assoc_resp_len (-= 6), both u8, with no lower bound. The aggregate check recently added to ath6kl_wmi_connect_event_rx() bounds the declared lengths from above (their sum must fit the received event), but an assoc request/response shorter than its fixed offset still underflows here: the u8 wraps to ~250, and cfg80211_connect_result() / cfg80211_roamed() then treat that wrapped value as the IE length and copy that many bytes out of the small assoc_info buffer to user space via nl80211, disclosing adjacent slab memory. Clamp both lengths to their offsets before subtracting. Found by 0sec (https://0sec.ai) using automated source analysis; the missing lower bound is evident from source. Compile-tested.
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
bdcd81707973cf8aa9305337166f8ee842a050d4 to < 225587bdbf4b0eb5265a71ee4dc183561a1857fcaffectedbdcd81707973cf8aa9305337166f8ee842a050d4 to < d337213a889705a69735079606d0b4c672b17605affectedbdcd81707973cf8aa9305337166f8ee842a050d4 to < e11d5ae96d5e52cb48fa27c6ad352d766d0322fbaffectedbdcd81707973cf8aa9305337166f8ee842a050d4 to < 6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9affectedbdcd81707973cf8aa9305337166f8ee842a050d4 to < e3619bed5da125713b29ac881dc66f5e06606f88affectedbdcd81707973cf8aa9305337166f8ee842a050d4 to < e1330d719c047c4d8190a16be034b29fc601a815affectedbdcd81707973cf8aa9305337166f8ee842a050d4 to < 8eb73016fb3968cf2db3987a92764563a3af773aaffectedbdcd81707973cf8aa9305337166f8ee842a050d4 to < 3bbd05723d15dd06f0560bcd94fbf9a91b5f5613affected
Linux Linux
Default version status: affected
3.2affected0 to < 3.2unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/225587bdbf4b0eb5265a71ee4dc183561a1857fc ↗
- https://git.kernel.org/stable/c/d337213a889705a69735079606d0b4c672b17605 ↗
- https://git.kernel.org/stable/c/e11d5ae96d5e52cb48fa27c6ad352d766d0322fb ↗
- https://git.kernel.org/stable/c/6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9 ↗
- https://git.kernel.org/stable/c/e3619bed5da125713b29ac881dc66f5e06606f88 ↗
- https://git.kernel.org/stable/c/e1330d719c047c4d8190a16be034b29fc601a815 ↗
- https://git.kernel.org/stable/c/8eb73016fb3968cf2db3987a92764563a3af773a ↗
- https://git.kernel.org/stable/c/3bbd05723d15dd06f0560bcd94fbf9a91b5f5613 ↗