Out-of-bounds read in Linux kernel - CVE-2026-90230
Published: September 18, 2026
Vulnerability identifier: #VU151257
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90230
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to read memory beyond an allocated buffer.
The vulnerability exists due to a heap out-of-bounds read in nvmet_auth_negotiate() when processing host-supplied DH-HMAC-CHAP negotiation messages. A remote attacker can send a negotiation message with a truncated transfer length or oversized hash or DH group identifier lists to read memory beyond an allocated buffer.
Affected software
Linux kernel
How to mitigate CVE-2026-90230
Install security update from vendor's repository.
External References
- https://git.kernel.org/stable/c/5bb96cc218835769ab74ec7f3ea2bf81fbffe955
- https://git.kernel.org/stable/c/7b81e4d2230e3d2d372c826180c4ef0efc244f31
- https://git.kernel.org/stable/c/89ff11b72f38976f3b5aea23a5228ee05e277209
- https://git.kernel.org/stable/c/aaac783950b17c57df9b6f7344747cacb1a407ed
- https://git.kernel.org/stable/c/c38a8186326799957d293d370136c128cd113916