CVE-2026-43044 Details
Description
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.
A vulnerability in the Linux kernel's Crypto CAAM module can lead to DMA corruption when handling HMAC keys longer than the block size. The issue arises because the memory for the key copy is not properly allocated to align with DMA cache requirements, potentially causing the hashed key to overwrite adjacent memory. This vulnerability affects several versions of the Linux kernel.
The vulnerability has been addressed by modifying the memory allocation method to ensure proper alignment. Users should update to the latest version of the Linux kernel where this fix has been applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/5ddfdcbe10dc5f97afc4e46ca22be2be717e8caf | kernel.org | Patch |
| https://git.kernel.org/stable/c/68feed135a0c7243a9275ae7e6a18260f755f52b | kernel.org | Patch |
| https://git.kernel.org/stable/c/a7ecf06d3ee06e9b3322e1e7b003ea5c6f6e135a | kernel.org | Patch |
| https://git.kernel.org/stable/c/c0c133e0225d87aad326bb90bbce9bdd6fde3cbb | kernel.org | Patch |
| https://git.kernel.org/stable/c/f2af8be110bde26b3e3354efdfdda97f426306a4 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.3, < 6.6.134 >= 6.7, < 6.12.81 >= 6.13, < 6.18.22 >= 6.19, < 6.19.12 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 8, 2026 | Initial Analysis | [email protected] |
| May 3, 2026 | CVE Modified | kernel.org |
| May 1, 2026 | New CVE Received | kernel.org |