CVE-2026-80791
Description
In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: zero the AUTH_RECEIVE response buffer nvmet_execute_auth_receive() allocates the response buffer with kmalloc() sized by the host-supplied AUTH_RECEIVE allocation length, but the DH-HMAC-CHAP builders write only a fixed-size message into it. The full allocation length is then copied to the wire by nvmet_copy_to_sgl(), so a remote initiator receives the bytes past the built message -- up to nearly a page of uninitialized slab -- during the pre-authentication handshake. Allocate the buffer with kzalloc() so the unwritten tail is zeroed before it is sent; conforming responses are unaffected.
How to fix
- Linux Linux447b668faa14710f611e714031e3739ac3ec3a4f, 8f6363c8d54dde95982f0ab45e77cf57ec0efd62, dfcf013f77709ebdb282767edc2795a37cab5b57, b26189d28442183a8b5edb754f4a6918f77ca84e, 2dcc9226203da7275a9c29d20007da278d73d5e9, 1d6837d98bf966a041af65de5f78de7409ff83bc, 3ddcfb013322aa37eaa7a0d344b73079c38dfa21 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | db1312dd95488b5e6ff362ff66fcf953a46b1821 ≤ v < 447b668faa14710f611e714031e3739ac3ec3a4f, db1312dd95488b5e6ff362ff66fcf953a46b1821 ≤ v < 8f6363c8d54dde95982f0ab45e77cf57ec0efd62, db1312dd95488b5e6ff362ff66fcf953a46b1821 ≤ v < dfcf013f77709ebdb282767edc2795a37cab5b57, db1312dd95488b5e6ff362ff66fcf953a46b1821 ≤ v < b26189d28442183a8b5edb754f4a6918f77ca84e, db1312dd95488b5e6ff362ff66fcf953a46b1821 ≤ v < 2dcc9226203da7275a9c29d20007da278d73d5e9, db1312dd95488b5e6ff362ff66fcf953a46b1821 ≤ v < 1d6837d98bf966a041af65de5f78de7409ff83bc, db1312dd95488b5e6ff362ff66fcf953a46b1821 ≤ v < 3ddcfb013322aa37eaa7a0d344b73079c38dfa21, 6.0 | 447b668faa14710f611e714031e3739ac3ec3a4f, 8f6363c8d54dde95982f0ab45e77cf57ec0efd62, dfcf013f77709ebdb282767edc2795a37cab5b57, b26189d28442183a8b5edb754f4a6918f77ca84e, 2dcc9226203da7275a9c29d20007da278d73d5e9, 1d6837d98bf966a041af65de5f78de7409ff83bc, 3ddcfb013322aa37eaa7a0d344b73079c38dfa21 |
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