Description
In the Linux kernel, the following vulnerability has been resolved: wifi: libipw: reject too-short association responses libipw_handle_assoc_resp() reads the capability, status and aid fields of the 30-byte association response prefix and then computes the information element length as stats->len - sizeof(*frame) stats->len is a u16 and sizeof() has type size_t, so the subtraction is evaluated as size_t and wraps instead of going negative. Truncating that to the u16 length parameter of libipw_parse_info_param() turns a frame shorter than the fixed fields into a length near 64 KiB, and the parser then reads past the receive buffer. Both the ipw2100 and ipw2200 management receive paths reach this function having established only that the frame carries the generic 24-byte three-address header. Reject the frame before any fixed field is touched. Found by an AI-assisted review of length arithmetic in management frame parsers. Verified with a KUnit case under Generic KASAN on arm64 under QEMU; I do not have the hardware, so it is not tested on a real device.
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
9e8571affd1c54b9638b4ff9844e47aae07310f6 to < 766268b429ae26d8ca599031fa962b0fe4673120affected9e8571affd1c54b9638b4ff9844e47aae07310f6 to < d70bdb84cf1782039384c1ffa7a18b0303c286a7affected9e8571affd1c54b9638b4ff9844e47aae07310f6 to < 400b89217058fac672134a0d4092c8493dadb8adaffected9e8571affd1c54b9638b4ff9844e47aae07310f6 to < 46aa75291056b6dc5faaf956dffdb3e9662477b0affected9e8571affd1c54b9638b4ff9844e47aae07310f6 to < e3025ecdb2057f866c09e059fc1466e81d6f243eaffected9e8571affd1c54b9638b4ff9844e47aae07310f6 to < 14cb425ba1f3a5d849e3bbc3d02d84e0ae195dbbaffected9e8571affd1c54b9638b4ff9844e47aae07310f6 to < af1b69be19c34e28c0ae54bee954b58cd076969aaffected9e8571affd1c54b9638b4ff9844e47aae07310f6 to < adb7118b7d2cfd7e8213c17d7d2829f353017754affected
Linux Linux
Default version status: affected
2.6.15affected0 to < 2.6.15unaffected5.10.271 to ≤ 5.10.*unaffected5.15.222 to ≤ 5.15.*unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.112 to ≤ 6.12.*unaffected6.18.54 to ≤ 6.18.*unaffected7.2.8 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/766268b429ae26d8ca599031fa962b0fe4673120 ↗
- https://git.kernel.org/stable/c/d70bdb84cf1782039384c1ffa7a18b0303c286a7 ↗
- https://git.kernel.org/stable/c/400b89217058fac672134a0d4092c8493dadb8ad ↗
- https://git.kernel.org/stable/c/46aa75291056b6dc5faaf956dffdb3e9662477b0 ↗
- https://git.kernel.org/stable/c/e3025ecdb2057f866c09e059fc1466e81d6f243e ↗
- https://git.kernel.org/stable/c/14cb425ba1f3a5d849e3bbc3d02d84e0ae195dbb ↗
- https://git.kernel.org/stable/c/af1b69be19c34e28c0ae54bee954b58cd076969a ↗
- https://git.kernel.org/stable/c/adb7118b7d2cfd7e8213c17d7d2829f353017754 ↗