{
  "threat_severity" : "Moderate",
  "public_date" : "2026-05-08T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: crypto: caam - fix overflow on long hmac keys",
    "id" : "2468061",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2468061"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.1",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-125",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ncrypto: caam - fix overflow on long hmac keys\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.\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.", "A flaw was found in the Linux kernel's caam cryptographic accelerator driver. When processing a Hash-based Message Authentication Code (HMAC) key that exceeds the block size, the driver incorrectly handles memory allocation and copying. This can lead to an overflow, where the system attempts to read beyond the intended memory buffer, potentially corrupting neighboring memory. This memory corruption could lead to system instability or denial of service." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-06-20T00:00:00Z",
    "advisory" : "RHSA-2026:27288",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.26.1.el10_2"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-43330\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43330\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43330.mbox" ],
  "name" : "CVE-2026-43330",
  "csaw" : false
}