CVE-2026-98327 (GCVE-0-2026-98327)
Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-06 08:46
VLAI
EPSS
VEX
Title
wifi: mac80211: mesh: reset the CSA state when leaving
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: mesh: reset the CSA state when leaving
ifmsh->csa is allocated in ieee80211_mesh_csa_beacon() and only freed
in ieee80211_mesh_finish_csa(), i.e. when the channel switch completes.
Leaving the mesh while a switch is still pending therefore leaks it.
Additionally, ifmsh->csa_role and ifmsh->chsw_ttl have their state leak
in this case, so things can get mixed up in addition to the memory
leak.
Refactor the reset and call it in ieee80211_stop_mesh() to fix it all.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
b8456a14e9d2770846fcf74de18ff95b676149a3 , < aba8dfb45864441199748c33ce3c1c8ca121c8bd
(git)
Affected: b8456a14e9d2770846fcf74de18ff95b676149a3 , < bd3b21145ae2e781daac1bbd19216a63ab4e0cbd (git) Affected: b8456a14e9d2770846fcf74de18ff95b676149a3 , < ba5bf83a81e8832cb84bb3a2da67512f81f57a02 (git) Affected: b8456a14e9d2770846fcf74de18ff95b676149a3 , < 860134b3af77970e006feab7e5decb8c84771c7f (git) |
|
| Linux | Linux |
Affected:
3.13
Unaffected: 0 , < 3.13 (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.54 , ≤ 6.18.* (semver) Unaffected: 7.2.8 , ≤ 7.2.* (semver) Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
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{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/mac80211/mesh.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "b8456a14e9d2770846fcf74de18ff95b676149a3",
"versionType": "git"
},
{
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"status": "affected",
"version": "b8456a14e9d2770846fcf74de18ff95b676149a3",
"versionType": "git"
},
{
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"status": "affected",
"version": "b8456a14e9d2770846fcf74de18ff95b676149a3",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
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"programFiles": [
"net/mac80211/mesh.c"
],
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"lessThan": "3.13",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.12.112",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc4",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.112",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2.8",
"versionStartIncluding": "3.13",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.3-rc4",
"versionStartIncluding": "3.13",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: mesh: reset the CSA state when leaving\n\nifmsh-\u003ecsa is allocated in ieee80211_mesh_csa_beacon() and only freed\nin ieee80211_mesh_finish_csa(), i.e. when the channel switch completes.\nLeaving the mesh while a switch is still pending therefore leaks it.\n\nAdditionally, ifmsh-\u003ecsa_role and ifmsh-\u003echsw_ttl have their state leak\nin this case, so things can get mixed up in addition to the memory\nleak.\n\nRefactor the reset and call it in ieee80211_stop_mesh() to fix it all."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-06T08:46:20.317Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/aba8dfb45864441199748c33ce3c1c8ca121c8bd"
},
{
"url": "https://git.kernel.org/stable/c/bd3b21145ae2e781daac1bbd19216a63ab4e0cbd"
},
{
"url": "https://git.kernel.org/stable/c/ba5bf83a81e8832cb84bb3a2da67512f81f57a02"
},
{
"url": "https://git.kernel.org/stable/c/860134b3af77970e006feab7e5decb8c84771c7f"
}
],
"title": "wifi: mac80211: mesh: reset the CSA state when leaving",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-98327",
"datePublished": "2026-10-06T08:46:20.317Z",
"dateReserved": "2026-09-25T10:25:14.341Z",
"dateUpdated": "2026-10-06T08:46:20.317Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-98327",
"date": "2026-10-22",
"epss": "0.00175",
"percentile": "0.06676"
},
"microsoft_vex": {
"current_release_date": "2026-10-21T18:39:21.000Z",
"cve": "CVE-2026-98327",
"id": "msrc_CVE-2026-98327",
"initial_release_date": "2026-10-07T01:41:58.000Z",
"product_status:known_affected": "1",
"product_status:under_investigation": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "wifi: mac80211: mesh: reset the CSA state when leaving",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98327.json",
"version": "2"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/mac80211/mesh.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"versionType": "git"
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{
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{
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"product": "Linux",
"programFiles": [
"net/mac80211/mesh.c"
],
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"lessThan": "3.13",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.12.112",
"versionType": "semver"
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"version": "6.18.54",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
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"version": "7.2.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: mesh: reset the CSA state when leaving\n\nifmsh-\u003ecsa is allocated in ieee80211_mesh_csa_beacon() and only freed\nin ieee80211_mesh_finish_csa(), i.e. when the channel switch completes.\nLeaving the mesh while a switch is still pending therefore leaks it.\n\nAdditionally, ifmsh-\u003ecsa_role and ifmsh-\u003echsw_ttl have their state leak\nin this case, so things can get mixed up in addition to the memory\nleak.\n\nRefactor the reset and call it in ieee80211_stop_mesh() to fix it all."
}
],
"id": "CVE-2026-98327",
"lastModified": "2026-10-19T10:18:34.890",
"metrics": {},
"published": "2026-10-06T09:18:24.980",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/860134b3af77970e006feab7e5decb8c84771c7f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
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],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
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},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-10-10T08:55:22+00:00",
"cve": "CVE-2026-98327",
"id": "CVE-2026-98327",
"initial_release_date": "2026-10-06T00:00:00+00:00",
"product_status:known_not_affected": "277",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: wifi: mac80211: mesh: reset the CSA state when leaving",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98327.json",
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"id": "CVE-2026-98327",
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"product_status:known_affected": "282",
"product_status:known_not_affected": "65",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-98327",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-98327.json",
"version": "2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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