CVE-2026-64319

{"id": "CVE-2026-64319", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64319", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:39:00.486358Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "04fb6ff8b87a0ffff3860ff52bdb2fd04b31ece5", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "80cd28b56ab62d3e7ed0a7bf05282e6d3ee5b2a0", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "999f6205ede984a786f35f727b01f971b98e215d", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "6d7649c1231dac14d906985d2936967e23041c26", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "caa71b3a43ea5c13fe7141cb019ebcb03b8ac857", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "3a413ece2504c70aa34a20be4dafec04e8c741f9", "versionType": "git"}], "programFiles": ["drivers/nvme/target/fabrics-cmd-auth.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "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/nvme/target/fabrics-cmd-auth.c"], "defaultStatus": "affected"}]}], "published": "2026-07-25T10:17:13.290", "references": [{"url": "https://git.kernel.org/stable/c/04fb6ff8b87a0ffff3860ff52bdb2fd04b31ece5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3a413ece2504c70aa34a20be4dafec04e8c741f9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6d7649c1231dac14d906985d2936967e23041c26", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/80cd28b56ab62d3e7ed0a7bf05282e6d3ee5b2a0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/999f6205ede984a786f35f727b01f971b98e215d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/caa71b3a43ea5c13fe7141cb019ebcb03b8ac857", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: validate reply message payload bounds against transfer length\n\nnvmet_auth_reply() accesses the variable-length rval[] array using\nattacker-controlled hl (hash length) and dhvlen (DH value length) fields\nwithout verifying they fit within the allocated buffer of tl bytes.\n\nA malicious NVMe-oF initiator can craft a DHCHAP_REPLY message with a\nsmall transfer length but large hl/dhvlen values, causing out-of-bounds\nheap reads when the target processes the DH public key (rval + 2*hl) or\nperforms the host response memcmp.\n\nWith DH authentication configured, the OOB pointer is passed directly to\nsg_init_one() and read by crypto_kpp_compute_shared_secret(), reaching\nup to 526 bytes past the buffer. This is exploitable pre-authentication.\n\nAdd bounds validation ensuring sizeof(*data) + 2*hl + dhvlen <= tl before\nany access to the variable-length fields.\n\nDiscovered by Atuin - Automated Vulnerability Discovery Engine."}], "lastModified": "2026-10-30T13:19:33.567", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E522D2B1-0496-45B0-89F2-296512172BA8", "versionEndExcluding": "6.6.145", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "38A8100E-2B1A-462F-AEE9-8901B870FEF2", "versionEndExcluding": "6.12.96", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "914AE4BC-3D59-4C5A-9DB5-9CE327B429F7", "versionEndExcluding": "6.18.39", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6228DDD6-4557-4AA3-9F43-AB995D471E42", "versionEndExcluding": "7.1.4", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}