CVE-2026-80791
Published: September 8, 2026Last modified: September 8, 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.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.182-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.103-r0) | |
| Stream | linux-lts | Vulnerable (6.18.46-r0) |
References
- https://git.kernel.org/stable/c/1d6837d98bf966a041af65de5f78de7409ff83bc
- https://git.kernel.org/stable/c/2dcc9226203da7275a9c29d20007da278d73d5e9
- https://git.kernel.org/stable/c/3ddcfb013322aa37eaa7a0d344b73079c38dfa21
- https://git.kernel.org/stable/c/447b668faa14710f611e714031e3739ac3ec3a4f
- https://git.kernel.org/stable/c/8f6363c8d54dde95982f0ab45e77cf57ec0efd62
- https://git.kernel.org/stable/c/b26189d28442183a8b5edb754f4a6918f77ca84e
- https://git.kernel.org/stable/c/dfcf013f77709ebdb282767edc2795a37cab5b57