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        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
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          "category": "description",
          "text": "Issue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient's private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.",
          "title": "Vulnerability description"
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      "release_date": "2026-08-25T13:19:00Z",
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          "date": "2026-09-21T23:57:04.086494Z",
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            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.22.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-perl-1:1.0.2k-24.amzn2.0.22.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-static-1:1.0.2k-24.amzn2.0.22.tuxcare.els1.x86_64"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1790035022"
        },
        {
          "category": "none_available",
          "date": "2026-08-25T13:19:00Z",
          "details": "Affected",
          "product_ids": [
            "Amazon-Linux-2:openssl-1:1.0.2k-24.amzn2.0.17.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-1:1.0.2k-24.amzn2.0.20.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-1:1.0.2k-24.amzn2.0.21.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-1:1.0.2k-24.amzn2.0.22.x86_64",
            "Amazon-Linux-2:openssl-devel-1:1.0.2k-24.amzn2.0.17.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-devel-1:1.0.2k-24.amzn2.0.20.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-devel-1:1.0.2k-24.amzn2.0.21.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-devel-1:1.0.2k-24.amzn2.0.22.x86_64",
            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.17.tuxcare.els1.i686",
            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.17.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.20.tuxcare.els1.i686",
            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.20.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.21.tuxcare.els1.i686",
            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.21.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.22.i686",
            "Amazon-Linux-2:openssl-libs-1:1.0.2k-24.amzn2.0.22.x86_64",
            "Amazon-Linux-2:openssl-perl-1:1.0.2k-24.amzn2.0.17.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-perl-1:1.0.2k-24.amzn2.0.20.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-perl-1:1.0.2k-24.amzn2.0.21.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-perl-1:1.0.2k-24.amzn2.0.22.x86_64",
            "Amazon-Linux-2:openssl-static-1:1.0.2k-24.amzn2.0.17.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-static-1:1.0.2k-24.amzn2.0.20.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-static-1:1.0.2k-24.amzn2.0.21.tuxcare.els1.x86_64",
            "Amazon-Linux-2:openssl-static-1:1.0.2k-24.amzn2.0.22.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    }
  ]
}