{"api_version":"1","generated_at":"2026-10-26T08:56:34+00:00","cve":"CVE-2026-98889","urls":{"html":"https://cve.report/CVE-2026-98889","api":"https://cve.report/api/cve/CVE-2026-98889.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98889","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98889"},"summary":{"title":"wifi: iwlwifi: mvm: fix sched scan IE sizing","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-23 12:18:22","updated_at":"2026-10-26 07:17:14"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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"}}],"references":[{"url":"https://git.kernel.org/stable/c/0a63f98e5163a2ec2822dfb691ee5a6094de08ec","name":"https://git.kernel.org/stable/c/0a63f98e5163a2ec2822dfb691ee5a6094de08ec","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a24417478f90e9f1a4ea24cd4b784afccb56fbae","name":"https://git.kernel.org/stable/c/a24417478f90e9f1a4ea24cd4b784afccb56fbae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/05f79cea3b15cfe600b205ddcfd51ebee15d908a","name":"https://git.kernel.org/stable/c/05f79cea3b15cfe600b205ddcfd51ebee15d908a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/358eca9a898ad4cce7453e9dcfd005d019a2b01f","name":"https://git.kernel.org/stable/c/358eca9a898ad4cce7453e9dcfd005d019a2b01f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f2268060e99f94314b9988dfa17393c2694fa9b2","name":"https://git.kernel.org/stable/c/f2268060e99f94314b9988dfa17393c2694fa9b2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4f155d262b31b9b17e0f9856bdabe0968eb4930f","name":"https://git.kernel.org/stable/c/4f155d262b31b9b17e0f9856bdabe0968eb4930f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98889","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98889","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected eae94cf82d7456b57fa9fd55c1edb8a726dcc19c f2268060e99f94314b9988dfa17393c2694fa9b2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected eae94cf82d7456b57fa9fd55c1edb8a726dcc19c 358eca9a898ad4cce7453e9dcfd005d019a2b01f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected eae94cf82d7456b57fa9fd55c1edb8a726dcc19c 05f79cea3b15cfe600b205ddcfd51ebee15d908a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected eae94cf82d7456b57fa9fd55c1edb8a726dcc19c a24417478f90e9f1a4ea24cd4b784afccb56fbae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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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's 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's 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"},"nvd":{"publishedDate":"2026-10-23 12:18:22","lastModifiedDate":"2026-10-26 07:17:14","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98889","Ordinal":"1","Title":"wifi: iwlwifi: mvm: fix sched scan IE sizing","CVE":"CVE-2026-98889","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98889","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"wifi: iwlwifi: mvm: fix sched scan IE sizing"}]}}}