{
  "threat_severity" : "Moderate",
  "public_date" : "2026-06-24T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: crypto: ccp - copy IV using skcipher ivsize",
    "id" : "2492269",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2492269"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.0",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-805",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ncrypto: ccp - copy IV using skcipher ivsize\nAF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver.\nccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV\nbuffer while RFC3686 skciphers expose an 8-byte IV, so the restore\noverruns the provided buffer.\nUse crypto_skcipher_ivsize() to copy only the algorithm's IV length.", "A flaw was found in the Linux kernel's cryptographic coprocessor (CCP) driver. When processing AF_ALG rfc3686-ctr-aes-ccp requests, the ccp_aes_complete() function attempts to restore more data than the allocated buffer for the Initialization Vector (IV) can hold. This leads to a buffer overrun, which can result in memory corruption within the kernel." ],
  "statement" : "An out-of-bounds write exists in the AMD CCP AES completion path because ccp_aes_complete() restores AES_BLOCK_SIZE bytes into req iv even when the selected skcipher exposes a shorter IV. For RFC3686 CTR AES through AF_ALG, the caller IV can be 8 bytes while the driver copies 16 bytes, overwriting memory past the provided IV buffer. For the CVSS the PR:L is used because a local user or local process can reach AF_ALG crypto interfaces without needing full administrator privileges when the vulnerable CCP backed algorithm is available. The issue is not network reachable and requires local code execution on a system with the affected CCP crypto driver and algorithm available.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-07-14T00:00:00Z",
    "advisory" : "RHSA-2026:39494",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.34.1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-13T00:00:00Z",
    "advisory" : "RHSA-2026:38491",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.25.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-13T00:00:00Z",
    "advisory" : "RHSA-2026:38491",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.25.1.el9_8"
  } ],
  "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" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-53016\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53016\nhttps://lore.kernel.org/linux-cve-announce/2026062451-CVE-2026-53016-90ac@gregkh/T" ],
  "name" : "CVE-2026-53016",
  "mitigation" : {
    "value" : "To mitigate this issue, prevent module ccp-crypto from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
    "lang" : "en:us"
  },
  "csaw" : false
}