wifi: mac80211: count only matching reservations in reserved switch
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: count only matching reservations in reserved switch ieee80211_vif_use_reserved_switch() validates a replacement by counting assigned links on ctx->replace_ctx and treating reservations too broadly. A link can still be assigned to the old channel context while holding a reservation that belongs to a different replacement operation. That can make the current replacement appear complete too early. If another link finalizes first, the function can free the WILL_BE_REPLACED chanctx while the unmatched link and driver still use it, leading to a use-after-free in later beacon generation. Require an in-place reservation to point at the current replacement context, and require the reserved and assigned contexts to be the matching replacement pair, before counting or moving the link.
CVE-2026-98709
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-2026-98709
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": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
"lessThan": "4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41d",
"versionType": "git"
},
{
"status": "affected",
"version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
"lessThan": "d31f655e44631891788ca67018ec5e1ed1c7de86",
"versionType": "git"
},
{
"status": "affected",
"version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
"lessThan": "03525b632908b049f4d04cc8a71cdff2329589cf",
"versionType": "git"
},
{
"status": "affected",
"version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
"lessThan": "5cc54a000960bc88f8c58940164dca0e601ab39c",
"versionType": "git"
},
{
"status": "affected",
"version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
"lessThan": "437f3727b4fd715266c296435c116288f82666fd",
"versionType": "git"
}
],
"programFiles": [
"net/mac80211/chan.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mac80211/chan.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98709
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48922 · Revision 1
- Added to Heist Feed
- Publisher date