CVE-2026-89524

CVE CVE-2026-89524EUVD EUVD-2026-76430Published 2026-09-11T19:44:05.000ZLast changed 2026-09-14T12:00:40.000ZCVSS 8.1

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2.4; bdcd81707973cf8aa9305337166f8ee842a050d4 <e1330d719c047c4d8190a16be034b29fc601a815; bdcd81707973cf8aa9305337166f8ee842a050d4 <8eb73016fb3968cf2db3987a92764563a3af773a; patch: 6.6.157; patch: 6.18.50; patch: 6.1.188; patch: 7.3-rc1; bdcd81707973cf8aa9305337166f8ee842a050d4 <e3619bed5da125713b29ac881dc66f5e06606f88; bdcd81707973cf8aa9305337166f8ee842a050d4 <6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9; patch: 5.15.221; bdcd81707973cf8aa9305337166f8ee842a050d4 <d337213a889705a69735079606d0b4c672b17605; patch: 6.12.109; bdcd81707973cf8aa9305337166f8ee842a050d4 <3bbd05723d15dd06f0560bcd94fbf9a91b5f5613; bdcd81707973cf8aa9305337166f8ee842a050d4 <225587bdbf4b0eb5265a71ee4dc183561a1857fc; bdcd81707973cf8aa9305337166f8ee842a050d4 <e11d5ae96d5e52cb48fa27c6ad352d766d0322fb; patch: 0; patch: 5.10.270; 3.2

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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