CVE-2026-80791

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80791", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.793Z", "datePublished": "2026-09-04T15:13:03.204Z", "dateUpdated": "2026-10-19T08:43:44.536Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:43:44.536Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: zero the AUTH_RECEIVE response buffer\n\nnvmet_execute_auth_receive() allocates the response buffer with kmalloc()\nsized by the host-supplied AUTH_RECEIVE allocation length, but the\nDH-HMAC-CHAP builders write only a fixed-size message into it. The full\nallocation length is then copied to the wire by nvmet_copy_to_sgl(), so a\nremote initiator receives the bytes past the built message -- up to nearly\na page of uninitialized slab -- during the pre-authentication handshake.\n\nAllocate the buffer with kzalloc() so the unwritten tail is zeroed before\nit is sent; conforming responses are unaffected."}], "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": "447b668faa14710f611e714031e3739ac3ec3a4f", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "8f6363c8d54dde95982f0ab45e77cf57ec0efd62", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "dfcf013f77709ebdb282767edc2795a37cab5b57", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "b26189d28442183a8b5edb754f4a6918f77ca84e", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "2dcc9226203da7275a9c29d20007da278d73d5e9", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "1d6837d98bf966a041af65de5f78de7409ff83bc", "status": "affected", "versionType": "git"}, {"version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "lessThan": "3ddcfb013322aa37eaa7a0d344b73079c38dfa21", "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": "6.1.185", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.154", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.106", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.47", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.11", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.1", "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": "6.1.185"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.154"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.106"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.47"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f"}, {"url": "https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62"}, {"url": "https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57"}, {"url": "https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e"}, {"url": "https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9"}, {"url": "https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc"}, {"url": "https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21"}], "title": "nvmet-auth: zero the AUTH_RECEIVE response buffer", "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": "447b668faa14710f611e714031e3739ac3ec3a4f", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "8f6363c8d54dde95982f0ab45e77cf57ec0efd62", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "dfcf013f77709ebdb282767edc2795a37cab5b57", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "b26189d28442183a8b5edb754f4a6918f77ca84e", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "2dcc9226203da7275a9c29d20007da278d73d5e9", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "1d6837d98bf966a041af65de5f78de7409ff83bc", "status": "affected", "version": "db1312dd95488b5e6ff362ff66fcf953a46b1821", "versionType": "git"}, {"lessThan": "3ddcfb013322aa37eaa7a0d344b73079c38dfa21", "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": "6.1.*", "status": "unaffected", "version": "6.1.185", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.154", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.106", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.47", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.11", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.1", "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-auth: zero the AUTH_RECEIVE response buffer\n\nnvmet_execute_auth_receive() allocates the response buffer with kmalloc()\nsized by the host-supplied AUTH_RECEIVE allocation length, but the\nDH-HMAC-CHAP builders write only a fixed-size message into it. The full\nallocation length is then copied to the wire by nvmet_copy_to_sgl(), so a\nremote initiator receives the bytes past the built message -- up to nearly\na page of uninitialized slab -- during the pre-authentication handshake.\n\nAllocate the buffer with kzalloc() so the unwritten tail is zeroed before\nit is sent; conforming responses are unaffected."}], "id": "CVE-2026-80791", "lastModified": "2026-10-19T09:17:13.213", "metrics": {}, "published": "2026-09-04T16:18:05.327", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

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