CVE-2026-80791

nvmet-auth: zero the AUTH_RECEIVE response buffer

State: Published
Severity: Not scored
Published: Sep 4, 2026
Updated: Oct 19, 2026
Reserved: Aug 26, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 447b668faa14710f611e714031e3739ac3ec3a4fAffected db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 8f6363c8d54dde95982f0ab45e77cf57ec0efd62Affected db1312dd95488b5e6ff362ff66fcf953a46b1821 to before dfcf013f77709ebdb282767edc2795a37cab5b57Affected db1312dd95488b5e6ff362ff66fcf953a46b1821 to before b26189d28442183a8b5edb754f4a6918f77ca84eAffected db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 2dcc9226203da7275a9c29d20007da278d73d5e9Affected db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 1d6837d98bf966a041af65de5f78de7409ff83bcAffected db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 3ddcfb013322aa37eaa7a0d344b73079c38dfa21Affected
LinuxLinux	6.0Affected before 6.0Not affected 6.1.185 through 6.1.Not affected 6.6.154 through 6.6.Not affected 6.12.106 through 6.12.Not affected 6.18.47 through 6.18.Not affected 7.1.11 through 7.1.Not affected 7.2.1 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 447b668faa14710f611e714031e3739ac3ec3a4fAffected
db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 8f6363c8d54dde95982f0ab45e77cf57ec0efd62Affected
db1312dd95488b5e6ff362ff66fcf953a46b1821 to before dfcf013f77709ebdb282767edc2795a37cab5b57Affected
db1312dd95488b5e6ff362ff66fcf953a46b1821 to before b26189d28442183a8b5edb754f4a6918f77ca84eAffected
db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 2dcc9226203da7275a9c29d20007da278d73d5e9Affected
db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 1d6837d98bf966a041af65de5f78de7409ff83bcAffected
db1312dd95488b5e6ff362ff66fcf953a46b1821 to before 3ddcfb013322aa37eaa7a0d344b73079c38dfa21Affected

LinuxLinux

6.0Affected
before 6.0Not affected
6.1.185 through 6.1.*Not affected
6.6.154 through 6.6.*Not affected
6.12.106 through 6.12.*Not affected
6.18.47 through 6.18.*Not affected
7.1.11 through 7.1.*Not affected
7.2.1 through 7.2.*Not affected
7.3 and laterNot affected

References

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