CVE-2026-68405 (GCVE-0-2026-68405)
Vulnerability from cvelistv5
Published
2026-08-10 12:04
Modified
2026-08-19 16:34
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock
ieee80211_do_stop() removes AP_VLAN packets from the parent AP
ps->bc_buf while holding ps->bc_buf.lock with IRQs disabled. It then
calls ieee80211_free_txskb() before dropping the lock.
ieee80211_free_txskb() is not just a passive SKB release. For SKBs with
TX status state it can report a dropped frame through cfg80211/nl80211,
and that path can reach netlink tap transmit. This is the same reason
the pending queue cleanup in ieee80211_do_stop() already unlinks SKBs
under the queue lock and frees them after IRQ state is restored.
The buggy scenario involves two paths, with each column showing the
order within that path:
AP_VLAN management TX: AP_VLAN stop:
1. attach ACK-status state 1. clear the running state
2. queue a multicast SKB on 2. take ps->bc_buf.lock with IRQs
parent ps->bc_buf disabled
3. unlink the AP_VLAN SKB
4. call ieee80211_free_txskb()
Unlink matching AP_VLAN SKBs from ps->bc_buf under the existing lock,
but move them to a local free queue. Drop the lock and restore IRQ state
before calling ieee80211_free_txskb().
WARNING: kernel/softirq.c:430 at __local_bh_enable_ip
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 397a7a24ef8c2967a3e8090013f9c54714110c48 Version: 397a7a24ef8c2967a3e8090013f9c54714110c48 Version: 397a7a24ef8c2967a3e8090013f9c54714110c48 Version: 397a7a24ef8c2967a3e8090013f9c54714110c48 Version: 397a7a24ef8c2967a3e8090013f9c54714110c48 Version: 397a7a24ef8c2967a3e8090013f9c54714110c48 Version: 397a7a24ef8c2967a3e8090013f9c54714110c48 Version: 397a7a24ef8c2967a3e8090013f9c54714110c48 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/mac80211/iface.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0d2619e708e2ef02ba1c91642ea261d3f19d8f9a",
"status": "affected",
"version": "397a7a24ef8c2967a3e8090013f9c54714110c48",
"versionType": "git"
},
{
"lessThan": "659a81b62a61440b85e02c09903be861ae7679e5",
"status": "affected",
"version": "397a7a24ef8c2967a3e8090013f9c54714110c48",
"versionType": "git"
},
{
"lessThan": "aa01ef0ebbc3289154229ef58e65baf289eb9789",
"status": "affected",
"version": "397a7a24ef8c2967a3e8090013f9c54714110c48",
"versionType": "git"
},
{
"lessThan": "be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0ef",
"status": "affected",
"version": "397a7a24ef8c2967a3e8090013f9c54714110c48",
"versionType": "git"
},
{
"lessThan": "962f755a47d7ec3bbf6c709697d7f4c5f798441d",
"status": "affected",
"version": "397a7a24ef8c2967a3e8090013f9c54714110c48",
"versionType": "git"
},
{
"lessThan": "a424985c3ef2a87ce6057a853e18d0c441a86be8",
"status": "affected",
"version": "397a7a24ef8c2967a3e8090013f9c54714110c48",
"versionType": "git"
},
{
"lessThan": "4b8abf43bf34791c99d99dc3be13f897adefc461",
"status": "affected",
"version": "397a7a24ef8c2967a3e8090013f9c54714110c48",
"versionType": "git"
},
{
"lessThan": "f3858d5b1432098c1936e03d6e03dd0e33facf60",
"status": "affected",
"version": "397a7a24ef8c2967a3e8090013f9c54714110c48",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/mac80211/iface.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.9"
},
{
"lessThan": "3.9",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.265",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.148",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "3.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "3.9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock\n\nieee80211_do_stop() removes AP_VLAN packets from the parent AP\nps-\u003ebc_buf while holding ps-\u003ebc_buf.lock with IRQs disabled. It then\ncalls ieee80211_free_txskb() before dropping the lock.\n\nieee80211_free_txskb() is not just a passive SKB release. For SKBs with\nTX status state it can report a dropped frame through cfg80211/nl80211,\nand that path can reach netlink tap transmit. This is the same reason\nthe pending queue cleanup in ieee80211_do_stop() already unlinks SKBs\nunder the queue lock and frees them after IRQ state is restored.\n\nThe buggy scenario involves two paths, with each column showing the\norder within that path:\n\nAP_VLAN management TX: AP_VLAN stop:\n1. attach ACK-status state 1. clear the running state\n2. queue a multicast SKB on 2. take ps-\u003ebc_buf.lock with IRQs\n parent ps-\u003ebc_buf disabled\n 3. unlink the AP_VLAN SKB\n 4. call ieee80211_free_txskb()\n\nUnlink matching AP_VLAN SKBs from ps-\u003ebc_buf under the existing lock,\nbut move them to a local free queue. Drop the lock and restore IRQ state\nbefore calling ieee80211_free_txskb().\n\nWARNING: kernel/softirq.c:430 at __local_bh_enable_ip"
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:34:57.265Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/0d2619e708e2ef02ba1c91642ea261d3f19d8f9a"
},
{
"url": "https://git.kernel.org/stable/c/659a81b62a61440b85e02c09903be861ae7679e5"
},
{
"url": "https://git.kernel.org/stable/c/aa01ef0ebbc3289154229ef58e65baf289eb9789"
},
{
"url": "https://git.kernel.org/stable/c/be9dfcb0654c1f6c0fce7ba2a909683bb6f1e0ef"
},
{
"url": "https://git.kernel.org/stable/c/962f755a47d7ec3bbf6c709697d7f4c5f798441d"
},
{
"url": "https://git.kernel.org/stable/c/a424985c3ef2a87ce6057a853e18d0c441a86be8"
},
{
"url": "https://git.kernel.org/stable/c/4b8abf43bf34791c99d99dc3be13f897adefc461"
},
{
"url": "https://git.kernel.org/stable/c/f3858d5b1432098c1936e03d6e03dd0e33facf60"
}
],
"title": "wifi: mac80211: free AP_VLAN bc_buf SKBs outside IRQ lock",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68405",
"datePublished": "2026-08-10T12:04:25.241Z",
"dateReserved": "2026-07-30T09:28:09.390Z",
"dateUpdated": "2026-08-19T16:34:57.265Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…