CVE-2026-31779

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Any local privilege needed to configure WoWLAN is a deployment prerequisite, not attacker privilege in the highest reasonable scenario.\nUI:N - WoWLAN/net-detect processing occurs autonomously while the system is suspended and during resume. The attacker does not need a victim to open a file or perform an application-level action.\nS:U - The bug affects the Linux kernel driver handling its own device/firmware notification data. It does not cross into another security authority such as a VM host boundary.\nC:H - The flaw is an out-of-bounds read from the firmware notification buffer into saved net-detect results and is not limited to only a few bytes. Under the required high-severity rule, this supports high confidentiality impact.\nI:N - The vulnerable operation is a read and bounded copy into an appropriately sized destination buffer. I found no out-of-bounds write or direct primitive for modifying kernel data.\nA:H - The copied unintended bytes are later interpreted as match/channel metadata and can drive invalid kernel accesses while reporting net-detect results. 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It does not cross into another security authority such as a VM host boundary.\nC:H - The flaw is an out-of-bounds read from the firmware notification buffer into saved net-detect results and is not limited to only a few bytes. Under the required high-severity rule, this supports high confidentiality impact.\nI:N - The vulnerable operation is a read and bounded copy into an appropriately sized destination buffer. I found no out-of-bounds write or direct primitive for modifying kernel data.\nA:H - The copied unintended bytes are later interpreted as match/channel metadata and can drive invalid kernel accesses while reporting net-detect results. 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Otherwise, results->matches may\ncontain unwanted data. To guarantee safety, extend the validation in one\nof the checks to ensure sufficient packet length.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nwifi: iwlwifi: mvm: corregir posible lectura fuera de l\u00edmites en iwl_mvm_nd_match_info_handler()\n\nLa funci\u00f3n memcpy asume que el array din\u00e1mico notif -> matches es al menos tan grande como el n\u00famero de bytes a copiar. De lo contrario, results -> matches puede contener datos no deseados. Para garantizar la seguridad, extender la validaci\u00f3n en una de las comprobaciones para asegurar una longitud de paquete suficiente.\n\nEncontrado por Linux Verification Center (linuxtesting.org) con SVACE."}], "id": "CVE-2026-31779", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31779", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:13:14.151530Z", "version": "2.0.3"}}]}, "published": "2026-05-01T15:16:41.330", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/744fabc338e87b95c4d1ff7c95bc8c0f834c6d99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca0e9491b98ca4c5b44204b0b3dd8062a3b5fba2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dd90880eb5ec5442b37eb2b95688f4a63f4883e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e67d8c626ace80b0fa2b48c8ec0a46b508c93442"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f6abac936a0dfd31d6c3e49205ec0ee75a8f887f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ffbed27ba15ef80d1c622eeedbfef03e501ae134"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()", "id": "2464491", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464491"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-805", "details": ["A flaw was found in the Linux kernel's iwlwifi component. This vulnerability involves a potential out-of-bounds read within the `iwl_mvm_nd_match_info_handler()` function. The `memcpy` function, used in this handler, does not adequately validate the size of an incoming packet, which could allow an attacker to read unintended data from memory. This could potentially lead to information disclosure."], "name": "CVE-2026-31779", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31779\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31779\nhttps://lore.kernel.org/linux-cve-announce/2026050151-CVE-2026-31779-a44d@gregkh/T"], "threat_severity": "Moderate"}

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