CVE-2026-72130

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The SUCCESS1 minimum is sizeof(struct\nnvmf_auth_dhchap_success1_data) plus the HMAC hash length, because the\nresponse hash is written into the rval[] flexible-array tail, so the\nminimum is state dependent rather than a flat sizeof. CHALLENGE keeps its\nexisting variable-length guard in nvmet_auth_challenge().\n\nThis is reachable only when in-band DH-HMAC-CHAP authentication is\nconfigured on the target."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The bug is in nvmet DH-HMAC-CHAP AUTH_RECEIVE handling reached by remote NVMe-oF initiators over network transports (nvmet-tcp/RDMA/FC); malicious allocation length arrives in a Fabrics command capsule from the network.\nAC:L - Once an auth-enabled target is reachable, the attacker fully controls AUTH_RECEIVE allocation length and can reliably reach vulnerable states (e.g. default NEGOTIATE branch or FAILURE1) without conditions beyond their control.\nPR:N - Exploitation occurs on the pre-authentication DH-HMAC-CHAP handshake before credentials are verified; no Linux privileges on the target are required, only network access to an auth-configured NVMe-oF target port.\nUI:N - No victim user action is required beyond the administrator having already deployed an NVMe-oF target; exploitation is driven entirely by attacker-sent Fabrics authentication commands.\nS:U - Impact is kernel heap memory corruption within the NVMe target subsystem on the same host; it does not cross a VM/hypervisor or IOMMU security boundary by itself.\nC:H - A controlled heap out-of-bounds write (up to 16 bytes plus optional HMAC tail in SUCCESS1) can corrupt adjacent kmalloc objects and be leveraged for kernel information disclosure, per memory-corruption guidance.\nI:H - The vulnerability is a heap out-of-bounds write in kernel context; such corruption is exploitable for arbitrary memory modification and potential code execution, not merely a bounded logic error.\nA:H - Heap corruption can cause kernel oops/panic, and the FAILURE1 AUTH_RECEIVE completion path calls nvmet_ctrl_fatal_error(), taking down the NVMe controller and denying service to connected initiators."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/fabrics-cmd-auth.c"], "versions": [{"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "ecdb6332fe59ddf18aad758a4926e3d483f4860a", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "584d7d14d9b40b080b1195cec83de86ade63343e", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "80bf7b7f676e3987bbe06af3c359bd56ac91a5a9", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "2eaa3ad450141cfcf187bb43cb8335eb336b5f87", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": 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"versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ecdb6332fe59ddf18aad758a4926e3d483f4860a"}, {"url": "https://git.kernel.org/stable/c/584d7d14d9b40b080b1195cec83de86ade63343e"}, {"url": "https://git.kernel.org/stable/c/80bf7b7f676e3987bbe06af3c359bd56ac91a5a9"}, {"url": "https://git.kernel.org/stable/c/2eaa3ad450141cfcf187bb43cb8335eb336b5f87"}, {"url": "https://git.kernel.org/stable/c/bc111698b46e43eddd8664cceaa621cd559e99a0"}, {"url": "https://git.kernel.org/stable/c/779575bc35c687697ba69e904f2cd22e60112534"}], "title": "nvmet-auth: reject short AUTH_RECEIVE buffers", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72130", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical 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no Linux privileges on the target are required, only network access to an auth-configured NVMe-oF target port.\nUI:N - No victim user action is required beyond the administrator having already deployed an NVMe-oF target; exploitation is driven entirely by attacker-sent Fabrics authentication commands.\nS:U - Impact is kernel heap memory corruption within the NVMe target subsystem on the same host; it does not cross a VM/hypervisor or IOMMU security boundary by itself.\nC:H - A controlled heap out-of-bounds write (up to 16 bytes plus optional HMAC tail in SUCCESS1) can corrupt adjacent kmalloc objects and be leveraged for kernel information disclosure, per memory-corruption guidance.\nI:H - The vulnerability is a heap out-of-bounds write in kernel context; such corruption is exploitable for arbitrary memory modification and potential code execution, not merely a bounded logic error.\nA:H - Heap corruption can cause kernel oops/panic, and the FAILURE1 AUTH_RECEIVE completion path calls nvmet_ctrl_fatal_error(), taking down the NVMe controller and denying service to connected initiators."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "ecdb6332fe59ddf18aad758a4926e3d483f4860a", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "584d7d14d9b40b080b1195cec83de86ade63343e", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "80bf7b7f676e3987bbe06af3c359bd56ac91a5a9", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "2eaa3ad450141cfcf187bb43cb8335eb336b5f87", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "bc111698b46e43eddd8664cceaa621cd559e99a0", "versionType": "git"}, {"status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "779575bc35c687697ba69e904f2cd22e60112534", "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": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.101", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "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"}], "references": [{"url": "https://git.kernel.org/stable/c/ecdb6332fe59ddf18aad758a4926e3d483f4860a"}, {"url": "https://git.kernel.org/stable/c/584d7d14d9b40b080b1195cec83de86ade63343e"}, {"url": "https://git.kernel.org/stable/c/80bf7b7f676e3987bbe06af3c359bd56ac91a5a9"}, {"url": "https://git.kernel.org/stable/c/2eaa3ad450141cfcf187bb43cb8335eb336b5f87"}, {"url": "https://git.kernel.org/stable/c/bc111698b46e43eddd8664cceaa621cd559e99a0"}, {"url": "https://git.kernel.org/stable/c/779575bc35c687697ba69e904f2cd22e60112534"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: reject short AUTH_RECEIVE buffers\n\nnvmet_execute_auth_receive() trusts the AUTH_RECEIVE allocation length\nafter checking only that it is nonzero and matches the transfer length.\nIn the SUCCESS1 and FAILURE1/default states, that lets a remote NVMe-oF\ninitiator reach the fixed-size DH-HMAC-CHAP response builders with a\nkmalloc() buffer shorter than the response, so nvmet_auth_success1() and\nnvmet_auth_failure1() write past the allocation; both only WARN_ON the\nshort length and then format the message anyway.\n\nImpact: A remote NVMe-oF initiator with access to an auth-enabled target\ncan trigger a 16-byte heap out-of-bounds write via a one-byte\nAUTH_RECEIVE allocation length.\n\nCompute the minimum response length for the current DH-HMAC-CHAP step in\nnvmet_auth_receive_data_len() and report a zero data length when the\nhost-supplied allocation length is shorter, so the existing zero-length\ncheck in nvmet_execute_auth_receive() rejects the command before any\nbuilder runs. The SUCCESS1 minimum is sizeof(struct\nnvmf_auth_dhchap_success1_data) plus the HMAC hash length, because the\nresponse hash is written into the rval[] flexible-array tail, so the\nminimum is state dependent rather than a flat sizeof. CHALLENGE keeps its\nexisting variable-length guard in nvmet_auth_challenge().\n\nThis is reachable only when in-band DH-HMAC-CHAP authentication is\nconfigured on the target."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.191", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.160", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.101", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:28:49.087Z"}}}, "cveMetadata": {"cveId": "CVE-2026-72130", "state": "PUBLISHED", "dateUpdated": "2026-10-30T12:28:49.087Z", "dateReserved": "2026-08-09T03:40:39.907Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:53:06.604Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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The SUCCESS1 minimum is sizeof(struct\nnvmf_auth_dhchap_success1_data) plus the HMAC hash length, because the\nresponse hash is written into the rval[] flexible-array tail, so the\nminimum is state dependent rather than a flat sizeof. CHALLENGE keeps its\nexisting variable-length guard in nvmet_auth_challenge().\n\nThis is reachable only when in-band DH-HMAC-CHAP authentication is\nconfigured on the target."}], "id": "CVE-2026-72130", "lastModified": "2026-10-30T13:19:47.237", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72130", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:42:34.388225Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:21:30.453", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2eaa3ad450141cfcf187bb43cb8335eb336b5f87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/584d7d14d9b40b080b1195cec83de86ade63343e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/779575bc35c687697ba69e904f2cd22e60112534"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/80bf7b7f676e3987bbe06af3c359bd56ac91a5a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc111698b46e43eddd8664cceaa621cd559e99a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ecdb6332fe59ddf18aad758a4926e3d483f4860a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nvmet-auth: reject short AUTH_RECEIVE buffers", "id": "2516448", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516448"}, "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-787", "details": ["A flaw was found in the `nvmet-auth` component of the Linux kernel. A remote attacker, by sending a specially crafted `AUTH_RECEIVE` buffer to an NVMe-oF (NVM Express over Fabrics) target with in-band authentication enabled, can trigger a heap out-of-bounds write. This vulnerability arises because the system incorrectly processes the provided buffer length, leading to memory corruption. This can result in a denial of service or other unpredictable system behavior."], "name": "CVE-2026-72130", "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72130\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72130\nhttps://lore.kernel.org/linux-cve-announce/2026081530-CVE-2026-72130-63b4@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,80bf7b7f676e3987bbe06af3c359bd56ac91a5a9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,2eaa3ad450141cfcf187bb43cb8335eb336b5f87)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,bc111698b46e43eddd8664cceaa621cd559e99a0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,779575bc35c687697ba69e904f2cd22e60112534)"}}], "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": "affected", "versions": {"scheme": "semver", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc1,*]"}}], "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": "2026-08-15T09:30:04.899618+00:00", "updated": "2026-08-18T02:15:04.922136+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-122", "CWE-787"]}