{"id":"CVE-2026-80791","revision":"a6f6b3f47102475da56927873b5d3570","records":[{"revision":"a6f6b3f47102475da56927873b5d3570","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80791","aliases":[],"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":0,"publishedAt":"2026-09-04T15:13:03.204+00:00","modifiedAt":"2026-10-19T08:43:44.536+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/nvme/target/fabrics-cmd-auth.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"db1312dd95488b5e6ff362ff66fcf953a46b1821\",\n                            \"lessThan\": \"447b668faa14710f611e714031e3739ac3ec3a4f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"db1312dd95488b5e6ff362ff66fcf953a46b1821\",\n                            \"lessThan\": \"8f6363c8d54dde95982f0ab45e77cf57ec0efd62\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"db1312dd95488b5e6ff362ff66fcf953a46b1821\",\n                            \"lessThan\": \"dfcf013f77709ebdb282767edc2795a37cab5b57\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"db1312dd95488b5e6ff362ff66fcf953a46b1821\",\n                            \"lessThan\": \"b26189d28442183a8b5edb754f4a6918f77ca84e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"db1312dd95488b5e6ff362ff66fcf953a46b1821\",\n                            \"lessThan\": \"2dcc9226203da7275a9c29d20007da278d73d5e9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"db1312dd95488b5e6ff362ff66fcf953a46b1821\",\n                            \"lessThan\": \"1d6837d98bf966a041af65de5f78de7409ff83bc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"db1312dd95488b5e6ff362ff66fcf953a46b1821\",\n                            \"lessThan\": \"3ddcfb013322aa37eaa7a0d344b73079c38dfa21\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/nvme/target/fabrics-cmd-auth.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.185\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.154\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.106\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.47\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.11\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.1\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f","https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62","https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57","https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e","https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9","https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc","https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80791","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80791","identifiers":["CVE-2026-80791"]},"retained":false,"historicalAffected":[]}],"coverage":[]}