CVE-2026-98889 (GCVE-0-2026-98889)
Vulnerability from cvelistv5
Published
2026-10-23 11:37
Modified
2026-10-26 06:56
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: fix sched scan IE sizing
Scheduled scan built the probe request before iwl_mvm_scan_fits(),
so oversized IEs could be copied into the fixed preq buffer before
length validation. Move iwl_mvm_build_scan_probe() after the fits
check.
Also advertise max_sched_scan_ie_len using iwl_mvm_max_scan_ie_len()
so userspace limits account for driver-inserted DS/TPC bytes.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: eae94cf82d7456b57fa9fd55c1edb8a726dcc19c Version: eae94cf82d7456b57fa9fd55c1edb8a726dcc19c Version: eae94cf82d7456b57fa9fd55c1edb8a726dcc19c Version: eae94cf82d7456b57fa9fd55c1edb8a726dcc19c Version: eae94cf82d7456b57fa9fd55c1edb8a726dcc19c Version: eae94cf82d7456b57fa9fd55c1edb8a726dcc19c |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c",
"drivers/net/wireless/intel/iwlwifi/mvm/scan.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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{
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]
},
{
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"product": "Linux",
"programFiles": [
"drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c",
"drivers/net/wireless/intel/iwlwifi/mvm/scan.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.53",
"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": "5.15.222",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
},
{
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{
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"vulnerable": true
},
{
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"versionEndExcluding": "7.2",
"versionStartIncluding": "5.11",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: fix sched scan IE sizing\n\nScheduled scan built the probe request before iwl_mvm_scan_fits(),\nso oversized IEs could be copied into the fixed preq buffer before\nlength validation. Move iwl_mvm_build_scan_probe() after the fits\ncheck.\n\nAlso advertise max_sched_scan_ie_len using iwl_mvm_max_scan_ie_len()\nso userspace limits account for driver-inserted DS/TPC bytes."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - Attacker-controlled bytes enter through NL80211_CMD_START_SCHED_SCAN\u0027s NL80211_ATTR_IE, then traverse ieee80211_request_sched_scan_start() to patched iwl_mvm_sched_scan_start() and iwl_mvm_build_scan_probe(); they are not received WiFi frames.\nAC:L - A valid IE stream near the advertised 486-byte limit deterministically overflows because ieee80211_build_preq_ies() adds and can duplicate data per band, while vulnerable iwl_mvm_sched_scan_start() calls iwl_mvm_build_scan_probe() before iwl_mvm_scan_fits(); no race is required.\nPR:L - NL80211_CMD_START_SCHED_SCAN uses GENL_UNS_ADMIN_PERM, which checks CAP_NET_ADMIN in the network namespace\u0027s owning user namespace; mac80211 sets WIPHY_FLAG_NETNS_OK, so a wiphy delegated to a user/net namespace is reachable without init-namespace root.\nUI:N - The attacker directly submits the scheduled-scan netlink request against an up, idle interface; no separate victim action is required.\nS:U - The overflow corrupts the host kernel stack inside iwl_mvm_sched_scan_start() and does not cross a VM, IOMMU, or other distinct security authority.\nC:H - The copies can run beyond params.preq.buf through adjacent pointers and beyond the local params object; this attacker-influenced stack corruption can be leveraged for control-flow execution and consequent disclosure of arbitrary kernel memory.\nI:H - iwl_mvm_build_scan_probe() copies attacker-supplied IEs plus per-band generated data into the fixed 512-byte preq.buf without first enforcing iwl_mvm_scan_fits(), producing an attacker-shaped out-of-bounds stack write capable of control-flow hijacking.\nA:H - The overwrite can extend beyond struct iwl_mvm_scan_params into stack control state; stack-protector detection or corrupted return state can oops or panic the kernel."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-26T06:56:14.362Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f2268060e99f94314b9988dfa17393c2694fa9b2"
},
{
"url": "https://git.kernel.org/stable/c/358eca9a898ad4cce7453e9dcfd005d019a2b01f"
},
{
"url": "https://git.kernel.org/stable/c/05f79cea3b15cfe600b205ddcfd51ebee15d908a"
},
{
"url": "https://git.kernel.org/stable/c/a24417478f90e9f1a4ea24cd4b784afccb56fbae"
},
{
"url": "https://git.kernel.org/stable/c/0a63f98e5163a2ec2822dfb691ee5a6094de08ec"
},
{
"url": "https://git.kernel.org/stable/c/4f155d262b31b9b17e0f9856bdabe0968eb4930f"
}
],
"title": "wifi: iwlwifi: mvm: fix sched scan IE sizing",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-98889",
"datePublished": "2026-10-23T11:37:49.469Z",
"dateReserved": "2026-09-25T10:25:14.378Z",
"dateUpdated": "2026-10-26T06:56:14.362Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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.
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