wifi: ath6kl: clamp assoc request/response lengths before subtracting IE offsets
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.
CVE-2026-89524
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89524
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
"lessThan": "225587bdbf4b0eb5265a71ee4dc183561a1857fc",
"versionType": "git"
},
{
"status": "affected",
"version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
"lessThan": "d337213a889705a69735079606d0b4c672b17605",
"versionType": "git"
},
{
"status": "affected",
"version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
"lessThan": "e11d5ae96d5e52cb48fa27c6ad352d766d0322fb",
"versionType": "git"
},
{
"status": "affected",
"version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
"lessThan": "6deb4d7a0c3d91821b2a8d5239e3d9933d9217d9",
"versionType": "git"
},
{
"status": "affected",
"version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
"lessThan": "e3619bed5da125713b29ac881dc66f5e06606f88",
"versionType": "git"
},
{
"status": "affected",
"version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
"lessThan": "e1330d719c047c4d8190a16be034b29fc601a815",
"versionType": "git"
},
{
"status": "affected",
"version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
"lessThan": "8eb73016fb3968cf2db3987a92764563a3af773a",
"versionType": "git"
},
{
"status": "affected",
"version": "bdcd81707973cf8aa9305337166f8ee842a050d4",
"lessThan": "3bbd05723d15dd06f0560bcd94fbf9a91b5f5613",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/ath/ath6kl/cfg80211.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/ath/ath6kl/cfg80211.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89524
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #35050 · Revision 1
- Added to Heist Feed
- Publisher date