CVE-2026-43330crypto: caam - fix overflow on long hmac keys
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 199354d7fb6eaa2cc5bb650af0bca624baffee35 – < 31022cfde5235c45fa765f0aabeff5f0652852f2
- affected 199354d7fb6eaa2cc5bb650af0bca624baffee35 – < c2fb4984fe09fc176fe4c12d5e3edf626df6511d
- affected 199354d7fb6eaa2cc5bb650af0bca624baffee35 – < aa545df011338df13f0833fc1fabcb15c0521959
- affected 199354d7fb6eaa2cc5bb650af0bca624baffee35 – < cebc5ebd958346195b77f42d0cd5141b4e448fae
- affected 199354d7fb6eaa2cc5bb650af0bca624baffee35 – < 80688afb9c35b3934ce2d6be9973758915e2e0ef
- affected 6.3
- unaffected < 6.3
- unaffected 6.6.134 – ≤ 6.6.*
- unaffected 6.12.81 – ≤ 6.12.*
- unaffected 6.18.22 – ≤ 6.18.*
- unaffected 6.19.12 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References5
- https://git.kernel.org/stable/c/31022cfde5235c45fa765f0aabeff5f0652852f2 (opens in a new tab)
- https://git.kernel.org/stable/c/c2fb4984fe09fc176fe4c12d5e3edf626df6511d (opens in a new tab)
- https://git.kernel.org/stable/c/aa545df011338df13f0833fc1fabcb15c0521959 (opens in a new tab)
- https://git.kernel.org/stable/c/cebc5ebd958346195b77f42d0cd5141b4e448fae (opens in a new tab)
- https://git.kernel.org/stable/c/80688afb9c35b3934ce2d6be9973758915e2e0ef (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-28614 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-43330)Record last updated .