CVE-2026-90230

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90230", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.794Z", "datePublished": "2026-09-17T16:07:37.940Z", "dateUpdated": "2026-10-19T09:00:06.762Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:00:06.762Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()\n\nnvmet_execute_auth_send() allocates the DH-HMAC-CHAP message buffer with\nthe host-supplied transfer length (tl) and hands it to\nnvmet_auth_negotiate() without passing tl along. nvmet_auth_negotiate()\nthen reads the negotiate header and, for each of the halen hash\nidentifiers and dhlen DH group identifiers, indexes into the fixed\nidlist[60] array (hashes at idlist[0..halen), groups at idlist[30..]).\n\nNeither the transfer length nor halen/dhlen is validated. A malicious or\nnon-conformant host can report a tl smaller than the negotiate structure,\nor a halen/dhlen larger than the array (both are u8, up to 255), making\nthe loops read past the end of the allocated buffer (heap out-of-bounds\nread). The sibling nvmet_auth_reply() already validates tl against the\nstructure size; the negotiate path did not.\n\nPass tl into nvmet_auth_negotiate(), reject a tl that does not cover the\nnegotiate data plus one full protocol descriptor, and reject halen/dhlen\nlarger than NVME_AUTH_DHCHAP_MAX_DH_IDS."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The malformed bytes are the DH-HMAC-CHAP Negotiate payload of an NVMe-oF Authentication Send capsule (cmd->auth_send.tl). nvmet-tcp receives that capsule in nvmet_tcp_try_recv_pdu/nvmet_tcp_try_recv_data, nvmet_copy_from_sgl copies it, and nvmet_auth_negotiate() parses it; NVMe/TCP is IP-routable.\nAC:L - Unpatched nvmet_auth_negotiate() never checks tl, halen, or dhlen. A host that sets auth_send.tl below 72 bytes (negotiate header plus nvmf_auth_dhchap_protocol_descriptor) and/or sets the u8 halen/dhlen fields to 255 makes the idlist[i] and idlist[i+30] loops deterministically over-read kmalloc(tl) with no race.\nPR:N - nvmet_parse_admin_cmd routes fabrics opcodes to nvmet_parse_fabrics_admin_cmd before nvmet_check_ctrl_status(), so AUTH_SEND runs without nvmet_check_auth_status(). sq->dhchap_step starts at NEGOTIATE, and nvmet_host_allowed() always permits nqn.2014-08.org.nvmexpress.discovery, so no DH-HMAC-CHAP secret is required.\nUI:N - The attacker opens a TCP connection to an already-listening nvmet-tcp port, sends Connect, then Authentication Send carrying the short or over-long DH-HMAC-CHAP Negotiate buffer; no victim mount, file open, or prompt is required.\nS:U - The over-read is of the kmalloc(tl) DH-HMAC-CHAP buffer and adjacent slab on the NVMe target host; it does not cross a VM, hypervisor, or IOMMU boundary.\nC:H - With tl shorter than the 72-byte negotiate-plus-descriptor layout, or with u8 halen/dhlen up to 255 against idlist[60], nvmet_auth_negotiate() heap-over-reads hundreds of bytes of adjacent slab via idlist[i] and idlist[i+30], which is not a few-byte leak.\nI:N - nvmet_auth_negotiate() only loads header fields and idlist[] entries and does not write past the allocation. Assigning ctrl->shash_id or ctrl->dh_gid from a parsed identifier is an in-bounds field update, not an OOB write or hijack primitive.\nA:H - Walking idlist[] hundreds of bytes past a small kmalloc(tl) AUTH_SEND object can oops if the read hits an unmapped page or a KASAN/KFENCE redzone, and the initiator can repeat Authentication Send on new connections to the same target."}]}], "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": "89ff11b72f38976f3b5aea23a5228ee05e277209", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "aaac783950b17c57df9b6f7344747cacb1a407ed", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "c38a8186326799957d293d370136c128cd113916", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "7b81e4d2230e3d2d372c826180c4ef0efc244f31", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "5bb96cc218835769ab74ec7f3ea2bf81fbffe955", "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/nvme/target/fabrics-cmd-auth.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.0", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/89ff11b72f38976f3b5aea23a5228ee05e277209"}, {"url": "https://git.kernel.org/stable/c/aaac783950b17c57df9b6f7344747cacb1a407ed"}, {"url": "https://git.kernel.org/stable/c/c38a8186326799957d293d370136c128cd113916"}, {"url": "https://git.kernel.org/stable/c/7b81e4d2230e3d2d372c826180c4ef0efc244f31"}, {"url": "https://git.kernel.org/stable/c/5bb96cc218835769ab74ec7f3ea2bf81fbffe955"}], "title": "nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/nvme/target/fabrics-cmd-auth.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "89ff11b72f38976f3b5aea23a5228ee05e277209", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "aaac783950b17c57df9b6f7344747cacb1a407ed", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "c38a8186326799957d293d370136c128cd113916", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "7b81e4d2230e3d2d372c826180c4ef0efc244f31", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "5bb96cc218835769ab74ec7f3ea2bf81fbffe955", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/nvme/target/fabrics-cmd-auth.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()\n\nnvmet_execute_auth_send() allocates the DH-HMAC-CHAP message buffer with\nthe host-supplied transfer length (tl) and hands it to\nnvmet_auth_negotiate() without passing tl along. nvmet_auth_negotiate()\nthen reads the negotiate header and, for each of the halen hash\nidentifiers and dhlen DH group identifiers, indexes into the fixed\nidlist[60] array (hashes at idlist[0..halen), groups at idlist[30..]).\n\nNeither the transfer length nor halen/dhlen is validated. A malicious or\nnon-conformant host can report a tl smaller than the negotiate structure,\nor a halen/dhlen larger than the array (both are u8, up to 255), making\nthe loops read past the end of the allocated buffer (heap out-of-bounds\nread). The sibling nvmet_auth_reply() already validates tl against the\nstructure size; the negotiate path did not.\n\nPass tl into nvmet_auth_negotiate(), reject a tl that does not cover the\nnegotiate data plus one full protocol descriptor, and reject halen/dhlen\nlarger than NVME_AUTH_DHCHAP_MAX_DH_IDS."}], "id": "CVE-2026-90230", "lastModified": "2026-10-19T09:19:13.423", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:17:18.803", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5bb96cc218835769ab74ec7f3ea2bf81fbffe955"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7b81e4d2230e3d2d372c826180c4ef0efc244f31"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89ff11b72f38976f3b5aea23a5228ee05e277209"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aaac783950b17c57df9b6f7344747cacb1a407ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c38a8186326799957d293d370136c128cd113916"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,89ff11b72f38976f3b5aea23a5228ee05e277209)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,aaac783950b17c57df9b6f7344747cacb1a407ed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,c38a8186326799957d293d370136c128cd113916)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,7b81e4d2230e3d2d372c826180c4ef0efc244f31)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db1312dd95488b5e6ff362ff66fcf953a46b1821,5bb96cc218835769ab74ec7f3ea2bf81fbffe955)"}}], "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": "generic", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-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": "2026-09-18T21:15:13.972357+00:00", "updated": "2026-09-20T02:45:18.431330+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}