{"api_version":"1","generated_at":"2026-09-11T00:48:36+00:00","cve":"CVE-2026-80791","urls":{"html":"https://cve.report/CVE-2026-80791","api":"https://cve.report/api/cve/CVE-2026-80791.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80791","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80791"},"summary":{"title":"nvmet-auth: zero the AUTH_RECEIVE response buffer","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-04 16:18:05","updated_at":"2026-09-04 16:18:05"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc","name":"https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e","name":"https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21","name":"https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9","name":"https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62","name":"https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57","name":"https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f","name":"https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80791","name":"CVE 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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."}],"providerMetadata":{"dateUpdated":"2026-09-04T15:13:03.204Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80791","datePublished":"2026-09-04T15:13:03.204Z","dateReserved":"2026-08-26T14:34:25.793Z","dateUpdated":"2026-09-04T15:13:03.204Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-04 16:18:05","lastModifiedDate":"2026-09-04 16:18:05","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80791","Ordinal":"1","Title":"nvmet-auth: zero the AUTH_RECEIVE response buffer","CVE":"CVE-2026-80791","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80791","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"nvmet-auth: zero the AUTH_RECEIVE response buffer"}]}}}