Unchecked Return Value in Linux kernel - CVE-2026-93156

Vulnerability identifier: #VU150856

CSH Severity: Low

CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-93156

CWE-ID: CWE-252

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause hash requests to produce incorrect digest values.

The vulnerability exists due to an unchecked return value in the rk3288 crypto ahash driver's rk_hash_run() function when waiting for the hash engine to become idle after a final DMA transfer. A local user can submit a hash request while the hash engine does not become idle to cause hash requests to produce incorrect digest values.

Linux kernel
Debian Linux
SUSE Linux Micro Extras
SUSE Linux Micro
Ubuntu
linux (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
kernel-64kb
kernel-default-devel-debuginfo
kernel-default-debugsource
kernel-obs-build-debugsource
kernel-obs-build
kernel-syms
kernel-default-devel
kernel-64kb-devel
kernel-64kb-debugsource
kernel-default
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
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
kernel-64kb - update to 6.4.0-159998.55.1
kernel-default-devel-debuginfo - update to 6.4.0-159998.55.1
kernel-default-debugsource - update to 6.4.0-159998.55.1
kernel-obs-build-debugsource - update to 6.4.0-159998.55.1
kernel-obs-build - update to 6.4.0-159998.55.1
kernel-syms - update to 6.4.0-159998.55.1
kernel-default-devel - update to 6.4.0-159998.55.1
kernel-64kb-devel - update to 6.4.0-159998.55.1
kernel-64kb-debugsource - update to 6.4.0-159998.55.1
kernel-default - update to 6.4.0-159998.55.1
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/0a261177ad3245af393548d0632226d99c643191
• https://git.kernel.org/stable/c/2feb52b2796c25510903bf0f18a84cde44631391
• https://git.kernel.org/stable/c/a22dc48d58ef46e21c0172ba83c33f1c9859e63c
• https://git.kernel.org/stable/c/ae150db7826f21e8d19e54fb6243169628809c4d
• https://git.kernel.org/stable/c/e7d8ddd471d2895f1d4098832c21121d4191adaa

• Unchecked Return Value in Linux kernel crypto rockchip driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• SUSE update for the Linux Kernel