CVE-2026-64304

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No race or attacker-uncontrollable condition is required.\nPR:L - An ordinary user can create, search, and use keys in a personal process, thread, or session keyring. No capability, administrator privilege, or user namespace is required.\nUI:N - The attacker directly performs the add_key and keyctl system calls without any victim action.\nS:U - The vulnerable QAT driver and the corrupted kernel resources share the same security authority. Ordinary kernel privilege escalation does not cross a CVSS scope boundary.\nC:H - The controlled kernel-memory overwrite can corrupt page tables, credentials, or control-flow objects and plausibly yield code execution with access to protected kernel memory.\nI:H - Attacker-controlled CRT bytes are written outside the coherent DMA allocation, potentially through multiple CRT components. This can provide powerful kernel-memory corruption and control-flow hijacking primitives.\nA:H - The invalid destination can cause an immediate kernel fault or corrupt unrelated kernel memory and subsequently panic or hang the system. The attack is repeatable."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/crypto/intel/qat/qat_common/qat_asym_algs.c"], "versions": [{"version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "6d99c5fadd2df488103f64d6475b63ba6852202b", "status": "affected", "versionType": "git"}, {"version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "c34369473bfe92a0b46ec78d6358e30341c7f481", "status": "affected", "versionType": "git"}, {"version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "1002719d13072a5e4be1e993aa61dffb4a604e82", "status": "affected", "versionType": "git"}, {"version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "500319830d76911c120dc0b9605f8c16d7702844", "status": "affected", "versionType": "git"}, {"version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "3d61a214fdcda41f1ebfabbb483404032a7b4d91", "status": "affected", "versionType": "git"}, {"version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a", "status": "affected", "versionType": "git"}, {"version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "ce42224487c504aee4b7ff3a7342e7b4d7e28cc9", "status": "affected", "versionType": "git"}, {"version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "b3ac78756588059729b9195fcc9f4b37d54057a5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/crypto/intel/qat/qat_common/qat_asym_algs.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "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:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b"}, {"url": "https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481"}, {"url": "https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82"}, {"url": "https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844"}, {"url": "https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91"}, {"url": "https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a"}, {"url": "https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9"}, {"url": "https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5"}], "title": "crypto: qat - validate RSA CRT component lengths", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64304", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:38:47.574944Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:38:22.981Z"}}]}}

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No race or attacker-uncontrollable condition is required.\nPR:L - An ordinary user can create, search, and use keys in a personal process, thread, or session keyring. No capability, administrator privilege, or user namespace is required.\nUI:N - The attacker directly performs the add_key and keyctl system calls without any victim action.\nS:U - The vulnerable QAT driver and the corrupted kernel resources share the same security authority. Ordinary kernel privilege escalation does not cross a CVSS scope boundary.\nC:H - The controlled kernel-memory overwrite can corrupt page tables, credentials, or control-flow objects and plausibly yield code execution with access to protected kernel memory.\nI:H - Attacker-controlled CRT bytes are written outside the coherent DMA allocation, potentially through multiple CRT components. This can provide powerful kernel-memory corruption and control-flow hijacking primitives.\nA:H - The invalid destination can cause an immediate kernel fault or corrupt unrelated kernel memory and subsequently panic or hang the system. The attack is repeatable."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "6d99c5fadd2df488103f64d6475b63ba6852202b", "versionType": "git"}, {"status": "affected", "version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "c34369473bfe92a0b46ec78d6358e30341c7f481", "versionType": "git"}, {"status": "affected", "version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "1002719d13072a5e4be1e993aa61dffb4a604e82", "versionType": "git"}, {"status": "affected", "version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "500319830d76911c120dc0b9605f8c16d7702844", "versionType": "git"}, {"status": "affected", "version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "3d61a214fdcda41f1ebfabbb483404032a7b4d91", "versionType": "git"}, {"status": "affected", "version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a", "versionType": "git"}, {"status": "affected", "version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "ce42224487c504aee4b7ff3a7342e7b4d7e28cc9", "versionType": "git"}, {"status": "affected", "version": "879f77e9071f029e1c9bd5a75814ecf51370f846", "lessThan": "b3ac78756588059729b9195fcc9f4b37d54057a5", "versionType": "git"}], "programFiles": ["drivers/crypto/intel/qat/qat_common/qat_asym_algs.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.8"}, {"status": "unaffected", "version": "0", "lessThan": "4.8", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.96", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.39", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.4", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/crypto/intel/qat/qat_common/qat_asym_algs.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b"}, {"url": "https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481"}, {"url": "https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82"}, {"url": "https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844"}, {"url": "https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91"}, {"url": "https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a"}, {"url": "https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9"}, {"url": "https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - validate RSA CRT component lengths\n\nThe generic RSA key parser (rsa_helper.c) bounds each CRT component (p,\nq, dp, dq, qinv) by the modulus size n_sz, but qat_rsa_setkey_crt()\nallocates half-size DMA buffers (key_sz / 2) and right-aligns each\ncomponent with:\n\n memcpy(dst + half_key_sz - len, src, len)\n\nWhen a CRT component is larger than half_key_sz the subtraction\nunderflows and memcpy writes past the DMA buffer, causing memory\ncorruption.\n\nAdd a len > half_key_sz check next to the existing !len check for each\nof the five CRT components so the driver falls back to the non-CRT path\ninstead of writing out of bounds."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "4.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "4.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "4.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "4.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.96", "versionStartIncluding": "4.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.39", "versionStartIncluding": "4.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.4", "versionStartIncluding": "4.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.8"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:53:03.298Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64304", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:38:22.981Z", "dateReserved": "2026-07-19T15:36:31.779Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-25T08:49:38.873Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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validate RSA CRT component lengths\n\nThe generic RSA key parser (rsa_helper.c) bounds each CRT component (p,\nq, dp, dq, qinv) by the modulus size n_sz, but qat_rsa_setkey_crt()\nallocates half-size DMA buffers (key_sz / 2) and right-aligns each\ncomponent with:\n\n memcpy(dst + half_key_sz - len, src, len)\n\nWhen a CRT component is larger than half_key_sz the subtraction\nunderflows and memcpy writes past the DMA buffer, causing memory\ncorruption.\n\nAdd a len > half_key_sz check next to the existing !len check for each\nof the five CRT components so the driver falls back to the non-CRT path\ninstead of writing out of bounds."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncrypto: qat - validar las longitudes de los componentes RSA CRT\n\nEl analizador gen\u00e9rico de claves RSA (rsa_helper.c) limita cada componente CRT (p, q, dp, dq, qinv) por el tama\u00f1o del m\u00f3dulo n_sz, pero qat_rsa_setkey_crt() asigna b\u00faferes DMA de tama\u00f1o medio (key_sz / 2) y alinea a la derecha cada componente con:\n\n memcpy(dst + half_key_sz - len, src, len)\n\nCuando un componente CRT es mayor que half_key_sz, la resta subdesborda y memcpy escribe m\u00e1s all\u00e1 del b\u00fafer DMA, causando corrupci\u00f3n de memoria.\n\nA\u00f1adir una comprobaci\u00f3n len > half_key_sz junto a la comprobaci\u00f3n !len existente para cada uno de los cinco componentes CRT para que el controlador recurra a la ruta no-CRT en lugar de escribir fuera de los l\u00edmites."}], "id": "CVE-2026-64304", "lastModified": "2026-10-24T13:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64304", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:38:47.574944Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:11.403", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-787"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: crypto: qat - validate RSA CRT component lengths", "id": "2507119", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507119"}, "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-787", "details": ["A flaw was found in the Linux kernel's QAT (QuickAssist Technology) crypto module. This vulnerability occurs in the RSA key parser when handling CRT (Chinese Remainder Theorem) components. An underflow can happen during a memory copy operation if an RSA CRT component is larger than its allocated buffer, leading to memory corruption. This could potentially allow an attacker to cause system instability or execute arbitrary code."], "name": "CVE-2026-64304", "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": "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not 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": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64304\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64304\nhttps://lore.kernel.org/linux-cve-announce/2026072507-CVE-2026-64304-7d9a@gregkh/T"], "threat_severity": "Important"}

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