{"id":"CVE-2026-80791","title":"nvmet-auth: zero the AUTH_RECEIVE response buffer","summary":"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 all…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 447b668faa14710f611e714031e3739ac3ec3a4f","Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 8f6363c8d54dde95982f0ab45e77cf57ec0efd62","Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < dfcf013f77709ebdb282767edc2795a37cab5b57","Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < b26189d28442183a8b5edb754f4a6918f77ca84e","Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 2dcc9226203da7275a9c29d20007da278d73d5e9","Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 1d6837d98bf966a041af65de5f78de7409ff83bc","Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 3ddcfb013322aa37eaa7a0d344b73079c38dfa21","Linux 6.0"],"published":"2026-09-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:43:44.536Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80791","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"}],"tags":["cve.org"],"epss":0.00207,"epssPercentile":0.10098,"ingestedAt":"2026-10-19T10:20:54.957Z","slug":"CVE-2026-80791","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 447b668faa14710f611e714031e3739ac3ec3a4f`\n- `Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 8f6363c8d54dde95982f0ab45e77cf57ec0efd62`\n- `Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < dfcf013f77709ebdb282767edc2795a37cab5b57`\n- `Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < b26189d28442183a8b5edb754f4a6918f77ca84e`\n- `Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 2dcc9226203da7275a9c29d20007da278d73d5e9`\n- `Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 1d6837d98bf966a041af65de5f78de7409ff83bc`\n- `Linux >= db1312dd95488b5e6ff362ff66fcf953a46b1821 < 3ddcfb013322aa37eaa7a0d344b73079c38dfa21`\n- `Linux 6.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}