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

Vulnerability from cvelistv5 – Published: 2026-05-08 13:31 – Updated: 2026-08-05 12:27
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < 31022cfde5235c45fa765f0aabeff5f0652852f2 (git)
Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < c2fb4984fe09fc176fe4c12d5e3edf626df6511d (git)
Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < aa545df011338df13f0833fc1fabcb15c0521959 (git)
Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < cebc5ebd958346195b77f42d0cd5141b4e448fae (git)
Affected: 199354d7fb6eaa2cc5bb650af0bca624baffee35 , < 80688afb9c35b3934ce2d6be9973758915e2e0ef (git)
guessed Create a notification for this product.
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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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-14T18:04:31+00:00",
      "cve": "CVE-2026-43330",
      "id": "CVE-2026-43330",
      "initial_release_date": "2026-05-08T00:00:00+00:00",
      "product_status:fixed": "616",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: crypto: caam - fix overflow on long hmac keys",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43330.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.