CVE-2026-43330
In the Linux kernel, the following vulnerability has been resolved: crypto: caam - fix overflow on long hmac keys When a key longer than block size is supplied, it is copied and then hashed into the real key.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: caam - fix overflow 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 copying is performed using kmemdup, however this leads to an overflow: reading more bytes (aligned_len - keylen) from the keylen source buffer. Fix this by replacing kmemdup with kmalloc, followed by memcpy.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/31022cfde5235c45fa765f0aabeff5f0652852f2Patch
- https://git.kernel.org/stable/c/80688afb9c35b3934ce2d6be9973758915e2e0efPatch
- https://git.kernel.org/stable/c/aa545df011338df13f0833fc1fabcb15c0521959Patch
- https://git.kernel.org/stable/c/c2fb4984fe09fc176fe4c12d5e3edf626df6511dPatch
- https://git.kernel.org/stable/c/cebc5ebd958346195b77f42d0cd5141b4e448faePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.