CVE-2026-80791nvmet-auth: zero the AUTH_RECEIVE response buffer
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from db1312dd95488b5e6ff362ff66fcf953a46b1821 before 447b668faa14710f611e714031e3739ac3ec3a4f; from db1312dd95488b5e6ff362ff66fcf953a46b1821 before 8f6363c8d54dde95982f0ab45e77cf57ec0efd62; from db1312dd95488b5e6ff362ff66fcf953a46b1821 before dfcf013f77709ebdb282767edc2795a37cab5b57; from db1312dd95488b5e6ff362ff66fcf953a46b1821 before b26189d28442183a8b5edb754f4a6918f77ca84e; from db1312dd95488b5e6ff362ff66fcf953a46b1821 before 2dcc9226203da7275a9c29d20007da278d73d5e9; from db1312dd95488b5e6ff362ff66fcf953a46b1821 before 1d6837d98bf966a041af65de5f78de7409ff83bc; from db1312dd95488b5e6ff362ff66fcf953a46b1821 before 3ddcfb013322aa37eaa7a0d344b73079c38dfa21 | CNA record |
References
- https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f
- https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62
- https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57
- https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e
- https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9
- https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc
- https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.