{"id":"CVE-2026-98887","title":"wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO\n\nhwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload\nto a struct hwsim_tx_rate * and uncon…","severity":"none","vendor":"Linux","product":"Linux","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)"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T11:37:44.605Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98887","references":[{"url":"https://git.kernel.org/stable/c/3a96bb65b4b820d8b41fa155781ec1c29e3479d4"},{"url":"https://git.kernel.org/stable/c/59e1f2a0242232b4a3af144ae317d3913fc09046"},{"url":"https://git.kernel.org/stable/c/1ae85bb34fe3510659b86d6a5f8036dd498233f8"},{"url":"https://git.kernel.org/stable/c/6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695"},{"url":"https://git.kernel.org/stable/c/b5b1234bbfa25537fb9a5c0d62c328ed4547f721"},{"url":"https://git.kernel.org/stable/c/13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7"},{"url":"https://git.kernel.org/stable/c/3dc723ac78a6e4fa0fd49e27e487ed319da40a9f"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.580Z","slug":"CVE-2026-98887","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO\n\nhwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload\nto a struct hwsim_tx_rate * and unconditionally reads\nIEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds\nthe attribute from above (NLA_BINARY .len is a maximum) and the op sets\nGENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is\naccepted and the loop reads past the payload.\n\nRequire the exact length in the policy, so a malformed attribute is\nrejected before the handler runs.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3a96bb65b4b820d8b41fa155781ec1c29e3479d4`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 59e1f2a0242232b4a3af144ae317d3913fc09046`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1ae85bb34fe3510659b86d6a5f8036dd498233f8`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b5b1234bbfa25537fb9a5c0d62c328ed4547f721`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3dc723ac78a6e4fa0fd49e27e487ed319da40a9f`\n- `Linux < 5.10.271`\n- `Linux < 5.15.222`\n- `Linux < 6.1.189`\n- `Linux < 6.6.158`\n- `Linux < 6.12.111`\n- `Linux < 6.18.53`\n- `Linux (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}