{"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":"2026-09-04T15:13:03.204Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-04T15:13:03.204Z"},"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-rc1","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-rc1"}]}]}],"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"}}}}