{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98889", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.378Z", "datePublished": "2026-10-23T11:37:49.469Z", "dateUpdated": "2026-10-24T14:09:27.923Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:09:27.923Z" }, "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": { "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" }, "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c", "drivers/net/wireless/intel/iwlwifi/mvm/scan.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f2268060e99f94314b9988dfa17393c2694fa9b2", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "358eca9a898ad4cce7453e9dcfd005d019a2b01f", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "05f79cea3b15cfe600b205ddcfd51ebee15d908a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a24417478f90e9f1a4ea24cd4b784afccb56fbae", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0a63f98e5163a2ec2822dfb691ee5a6094de08ec", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4f155d262b31b9b17e0f9856bdabe0968eb4930f", "status": "affected", "versionType": "git" }, { "version": "0", "lessThan": "5.15.222", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "6.1.189", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "6.6.158", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "6.12.111", "status": "affected", "versionType": "semver" }, { "version": "0", "lessThan": "6.18.53", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c", "drivers/net/wireless/intel/iwlwifi/mvm/scan.c" ], "versions": [ { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.2" } ] } ] } ], "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" } } } }