{"id":"CVE-2026-80791","summary":"nvmet-auth: zero the AUTH_RECEIVE response buffer","details":"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.","modified":"2026-09-06T03:46:39.618962058Z","published":"2026-09-04T15:13:03.204Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80791.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21"},{"type":"WEB","url":"https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80791.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80791"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"db1312dd95488b5e6ff362ff66fcf953a46b1821"},{"fixed":"447b668faa14710f611e714031e3739ac3ec3a4f"},{"fixed":"8f6363c8d54dde95982f0ab45e77cf57ec0efd62"},{"fixed":"dfcf013f77709ebdb282767edc2795a37cab5b57"},{"fixed":"b26189d28442183a8b5edb754f4a6918f77ca84e"},{"fixed":"2dcc9226203da7275a9c29d20007da278d73d5e9"},{"fixed":"1d6837d98bf966a041af65de5f78de7409ff83bc"},{"fixed":"3ddcfb013322aa37eaa7a0d344b73079c38dfa21"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80791.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.1.185"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.154"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.106"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.11"}]},{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80791.json"}}],"schema_version":"1.9.0"}