wifi: mac80211: disconnect on CSA to channel 0
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: disconnect on CSA to channel 0 The refactor for the CSA parsing erroneously equates channel zero and no information present, leading it to ignore a CSA on an AP that advertises a switch to that (invalid) channel. This leads to not disconnecting, which we should. For Intel devices, this can lead to a firmware crash. Fix this by using an int type for the channel number as well as the opclass, and using a (negative) value that cannot be encoded in the element to indicate it's not present.
CVE-2026-90344
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-2026-90344
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": "21c3f8f95554feff9bed15703e89adbe582e0383",
"lessThan": "099aadb2012d7490bc584cc5075ef11cbc33f2c3",
"versionType": "git"
},
{
"status": "affected",
"version": "21c3f8f95554feff9bed15703e89adbe582e0383",
"lessThan": "e7bc5ab93acd1c3f54feeb9fa19ead3530168090",
"versionType": "git"
},
{
"status": "affected",
"version": "21c3f8f95554feff9bed15703e89adbe582e0383",
"lessThan": "eef374088450bb91626e133c7172b8a0e969a522",
"versionType": "git"
},
{
"status": "affected",
"version": "21c3f8f95554feff9bed15703e89adbe582e0383",
"lessThan": "cf57f0a674cc3e3cda1a789359cc1238b61b9d7d",
"versionType": "git"
}
],
"programFiles": [
"net/mac80211/spectmgmt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mac80211/spectmgmt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90344
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36682 · Revision 1
- Added to Heist Feed
- Publisher date