wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO

Overview

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO

hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload to a struct hwsim_tx_rate * and unconditionally reads IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds the attribute from above (NLA_BINARY .len is a maximum) and the op sets GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is accepted and the loop reads past the payload.

Require the exact length in the policy, so a malformed attribute is rejected before the handler runs.

Affected

• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3a96bb65b4b820d8b41fa155781ec1c29e3479d4
• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 59e1f2a0242232b4a3af144ae317d3913fc09046
• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1ae85bb34fe3510659b86d6a5f8036dd498233f8
• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695
• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b5b1234bbfa25537fb9a5c0d62c328ed4547f721
• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7
• Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3dc723ac78a6e4fa0fd49e27e487ed319da40a9f
• Linux < 5.10.271
• Linux < 5.15.222
• Linux < 6.1.189
• Linux < 6.6.158
• Linux < 6.12.111
• Linux < 6.18.53
• Linux (all versions)

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.