CVE-2026-43330 (GCVE-0-2026-43330)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:31 – Updated: 2026-05-08 13:31
VLAI?
Title
crypto: caam - fix overflow on long hmac keys
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < 31022cfde5235c45fa765f0aabeff5f0652852f2 (git)
Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < c2fb4984fe09fc176fe4c12d5e3edf626df6511d (git)
Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < aa545df011338df13f0833fc1fabcb15c0521959 (git)
Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < cebc5ebd958346195b77f42d0cd5141b4e448fae (git)
Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < 80688afb9c35b3934ce2d6be9973758915e2e0ef (git)
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    Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.134 , ≤ 6.6.* (semver)
Unaffected: 6.12.81 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/crypto/caam/caamalg_qi2.c"
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: caam - fix overflow on long hmac keys\n\nWhen a key longer than block size is supplied, it is copied and then\nhashed into the real key.  The memory allocated for the copy needs to\nbe rounded to DMA cache alignment, as otherwise the hashed key may\ncorrupt neighbouring memory.\n\nThe copying is performed using kmemdup, however this leads to an overflow:\nreading more bytes (aligned_len - keylen) from the keylen source buffer.\nFix this by replacing kmemdup with kmalloc, followed by memcpy."
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        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43330",
    "datePublished": "2026-05-08T13:31:18.133Z",
    "dateReserved": "2026-05-01T14:12:56.002Z",
    "dateUpdated": "2026-05-08T13:31:18.133Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-05-09",
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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