Out-of-bounds read in Linux kernel - CVE-2026-93155

Vulnerability identifier: #VU150855

CSH Severity: Low

CVSS v4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-93155

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local privileged user to cause a denial of service.

The vulnerability exists due to an out-of-bounds access in the Keem Bay OCS AES driver's register_aes_algs() function when skcipher algorithm registration fails after AEAD algorithm registration. A local privileged user can trigger the registration error path to cause a denial of service.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/27ec91c29ee155cc507b2f56221fc6fab65dbb51
• https://git.kernel.org/stable/c/5607b101d86cbee8dd1ffab784495c880ca73383
• https://git.kernel.org/stable/c/5bbb726d27ff6dff750264e51aa665538394d0f8
• https://git.kernel.org/stable/c/a3217fe7998622728a53dff405615e0971949eaf
• https://git.kernel.org/stable/c/e264401ce4776a288524e5b87593d4d864147115

• Out-of-bounds read in Linux kernel intel keembay driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more