CVE-2026-43044: crypto: caam - fix DMA corruption on long hmac keys
In the Linux kernel, the following vulnerability has been resolved:
crypto: caam - fix DMA corruption on long hmac keys
When a key longer than block size is supplied, it is copied and then hashed into the real key. The memory allocated for the copy needs to be rounded to DMA cache alignment, as otherwise the hashed key may corrupt neighbouring memory.
The rounding was performed, but never actually used for the allocation. Fix this by replacing kmemdup with kmalloc for a larger buffer, followed by memcpy.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-43044?
CVE-2026-43044 is considered a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2026-43044?
To fix CVE-2026-43044, you should update to the latest version of the Linux kernel where the vulnerability has been patched.
What systems are affected by CVE-2026-43044?
CVE-2026-43044 affects the Linux kernel, particularly in scenarios where long HMAC keys are used.
What are the consequences of CVE-2026-43044?
The consequences of CVE-2026-43044 include potential DMA corruption which could lead to data integrity issues.
Is there a workaround for CVE-2026-43044?
A temporary workaround for CVE-2026-43044 includes avoiding the use of long HMAC keys until a patch can be applied.