CVE-2026-43172

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In the adjacent attacker model, no local account or kernel privilege is required.\nUI:N - The parser runs automatically during normal Wi-Fi device start or restart. Exploitation does not require a victim to open a file, mount anything, or perform a special action.\nS:U - The corruption affects host kernel iwlwifi driver state within the same kernel security authority. It does not inherently cross a VM, IOMMU, or separate authorization boundary.\nC:H - The bug is an attacker-controlled out-of-bounds write past fwrt->smem_cfg.lmac into adjacent iwl_fw_runtime state. Kernel memory corruption is reasonably leverageable for high confidentiality impact.\nI:H - Firmware-controlled 32-bit values are written beyond the two-element LMAC array into adjacent kernel driver fields. This is an out-of-bounds write with potential for arbitrary kernel state modification or control-flow influence.\nA:H - Even without full exploitation, corrupting adjacent iwlwifi runtime/debug/workqueue state can crash or destabilize the kernel. 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For the affected Wi-Fi subsystem, the highest reasonable external exposure is an adjacent wireless attacker able to drive malicious firmware/device behavior.\nAC:L - There is no race or complex state requirement once a malformed response is supplied. Setting lmac_num to 3 deterministically reaches the out-of-bounds write in the 22000-series parser.\nPR:N - The malformed firmware response is parsed by the kernel driver without OS credential checks and before any Wi-Fi peer authentication boundary matters. In the adjacent attacker model, no local account or kernel privilege is required.\nUI:N - The parser runs automatically during normal Wi-Fi device start or restart. Exploitation does not require a victim to open a file, mount anything, or perform a special action.\nS:U - The corruption affects host kernel iwlwifi driver state within the same kernel security authority. 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Rechazar tal y usar IWL_FW_CHECK en lugar de WARN_ON en esta funci\u00f3n."}], "id": "CVE-2026-43172", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43172", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:15:17.444168Z", "version": "2.0.3"}}]}, "published": "2026-05-06T12:16:35.583", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1d49a42717bdc8de77eabeb5b7d3e88d141ffea9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2b4b1510aaaf5b9fb57327ecffc20c055f61f205"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/58192b9ce09b0f0f86e2036683bd542130b91a98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5cc021586420c5e13acc65da5bf73edd451e2c3e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b23c7cd616a6a113363be707b7b9e4bc41b18a07"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-129"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: wifi: iwlwifi: fix 22000 series SMEM parsing", "id": "2467216", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467216"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-1285", "details": ["A flaw was found in the Linux kernel's `iwlwifi` driver. This vulnerability occurs during SMEM parsing if the firmware reports an invalid number of Logical Media Access Controllers (LMACs), which can lead to an array overrun. This issue could potentially result in system instability or a denial of service (DoS)."], "name": "CVE-2026-43172", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43172\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43172\nhttps://lore.kernel.org/linux-cve-announce/2026050635-CVE-2026-43172-6ed1@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,1d49a42717bdc8de77eabeb5b7d3e88d141ffea9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,2b4b1510aaaf5b9fb57327ecffc20c055f61f205)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,58192b9ce09b0f0f86e2036683bd542130b91a98)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.16,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.6,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-06T15:45:06.325839+00:00", "updated": "2026-10-23T02:30:15.988658+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-1285", "CWE-129"]}