wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx()
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: fix out-of-bounds link array access in mt7996_tx() When mac80211 leaves the link unspecified, mt7996_tx() substitutes the primary link id of the station or vif. That value is IEEE80211_LINK_UNSPECIFIED (0xf) until the first link has been added, and it is then used unchecked to index vif->link_conf[], mvif->mt76.link[] and sta->link[], all of which hold IEEE80211_MLD_MAX_NUM_LINKS (15) entries. Clamp the primary link id to the default link before using it, and use the clamped value for the link_sta fallback as well.
CVE-2026-90349
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-2026-90349
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": "1609b014aa29f9a2bf3aaa93f71de4a06725845e",
"lessThan": "637bb99cc766a858d744905e46638459ca128b6c",
"versionType": "git"
},
{
"status": "affected",
"version": "1609b014aa29f9a2bf3aaa93f71de4a06725845e",
"lessThan": "aff81505a84d27f83b4db8e039e813930cb23c2c",
"versionType": "git"
},
{
"status": "affected",
"version": "1609b014aa29f9a2bf3aaa93f71de4a06725845e",
"lessThan": "4330a0ef9f75a54fde3548432a9a698f06bab635",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/mediatek/mt76/mt7996/main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.18",
"versionType": "semver"
},
{
"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": [
"drivers/net/wireless/mediatek/mt76/mt7996/main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90349
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36685 · Revision 1
- Added to Heist Feed
- Publisher date