{
  "threat_severity" : "Low",
  "public_date" : "2026-01-27T00:00:00Z",
  "bugzilla" : {
    "description" : "openssl: OpenSSL: Denial of Service via type confusion in PKCS#7 signature verification",
    "id" : "2430390",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2430390"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.9",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-1287",
  "details" : [ "Issue summary: A type confusion vulnerability exists in the signature\nverification of signed PKCS#7 data where an ASN1_TYPE union member is\naccessed without first validating the type, causing an invalid or NULL\npointer dereference when processing malformed PKCS#7 data.\nImpact summary: An application performing signature verification of PKCS#7\ndata or calling directly the PKCS7_digest_from_attributes() function can be\ncaused to dereference an invalid or NULL pointer when reading, resulting in\na Denial of Service.\nThe function PKCS7_digest_from_attributes() accesses the message digest attribute\nvalue without validating its type. When the type is not V_ASN1_OCTET_STRING,\nthis results in accessing invalid memory through the ASN1_TYPE union, causing\na crash.\nExploiting this vulnerability requires an attacker to provide a malformed\nsigned PKCS#7 to an application that verifies it. The impact of the\nexploit is just a Denial of Service, the PKCS7 API is legacy and applications\nshould be using the CMS API instead. For these reasons the issue was\nassessed as Low severity.\nThe FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue,\nas the PKCS#7 parsing implementation is outside the OpenSSL FIPS module\nboundary.\nOpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.", "A flaw was found in OpenSSL. This type confusion vulnerability allows a remote attacker to cause a denial of service (DoS) by providing specially crafted PKCS#7 data to an application that performs signature verification. The vulnerability occurs because the application accesses an ASN1_TYPE union member without proper type validation, leading to an invalid or NULL pointer dereference and a crash." ],
  "statement" : "This vulnerability is rated Low for Red Hat products. A type confusion flaw in the legacy PKCS#7 API can lead to a Denial of Service when processing specially crafted PKCS#7 data. Exploitation requires an application to perform signature verification of malformed PKCS#7 data. Red Hat products utilizing the FIPS module are not affected as the PKCS#7 parsing is outside the module boundary.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-01-28T00:00:00Z",
    "advisory" : "RHSA-2026:1472",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.1",
    "package" : "openssl-1:3.5.1-7.el10_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-01-28T00:00:00Z",
    "advisory" : "RHSA-2026:1473",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "openssl-1:3.5.1-7.el9_7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-01-28T00:00:00Z",
    "advisory" : "RHSA-2026:1473",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "openssl-1:3.5.1-7.el9_7"
  }, {
    "product_name" : "Cost Management 4",
    "release_date" : "2026-02-24T00:00:00Z",
    "advisory" : "RHSA-2026:3228",
    "cpe" : "cpe:/a:redhat:cost_management:4::el9",
    "package" : "costmanagement/costmanagement-metrics-rhel9-operator:sha256:1dd05671a8614a4354d9ebf94673f9e1bfd7a38af7052c2a4b9a25264f3ee4e1"
  }, {
    "product_name" : "Red Hat Discovery 2",
    "release_date" : "2026-02-02T00:00:00Z",
    "advisory" : "RHSA-2026:1736",
    "cpe" : "cpe:/a:redhat:discovery:2::el9",
    "package" : "discovery/discovery-server-rhel9:sha256:519d4fe184cebe5152f840e9f609fa4705590656ac9bcace2e2e17622ab7e6a8"
  }, {
    "product_name" : "Red Hat Discovery 2",
    "release_date" : "2026-02-02T00:00:00Z",
    "advisory" : "RHSA-2026:1736",
    "cpe" : "cpe:/a:redhat:discovery:2::el9",
    "package" : "discovery/discovery-ui-rhel9:sha256:26bb49a8e2e695d61192f04eb0db63efa8210bba20ea22b60e4e22d519d8b9e6"
  }, {
    "product_name" : "Red Hat Insights proxy 1.5",
    "release_date" : "2026-02-10T00:00:00Z",
    "advisory" : "RHSA-2026:2485",
    "cpe" : "cpe:/a:redhat:insights_proxy:1.5::el9",
    "package" : "insights-proxy/insights-proxy-container-rhel9:sha256:975a1e501a8520df83f3f4114e72a71384ff1866ec99c7a45fffbf8c76ef5cbc"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-02-11T00:00:00Z",
    "advisory" : "RHSA-2026:2563",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/installer-rhel9:sha256:48cf7cf48dfadb17f9357bf1894a5d0393551a893faa8b0ea0e11fe1ffed497f"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-03-18T00:00:00Z",
    "advisory" : "RHSA-2026:4943",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/cds-rhel9:sha256:200c27e9b396276bd505c6b41127ac5eb1d94d620172cb818ae733f2a21ac524"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-03-18T00:00:00Z",
    "advisory" : "RHSA-2026:4943",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/haproxy-rhel9:sha256:d98fd3fe5f5f9acd0efae7db19b61b864be1eb2fbe2586a1b6be2429fa2cc7a3"
  }, {
    "product_name" : "Red Hat Update Infrastructure 5",
    "release_date" : "2026-03-18T00:00:00Z",
    "advisory" : "RHSA-2026:4943",
    "cpe" : "cpe:/a:redhat:rhui:5::el9",
    "package" : "rhui5/rhua-rhel9:sha256:5f1fbf66fb349a7baf066a1216d39989c3b89f18ec5108b96d9643baf4856778"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "package_name" : "edk2",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "package_name" : "shim",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "package_name" : "shim-unsigned-aarch64",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Fix deferred",
    "package_name" : "shim-unsigned-x64",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Fix deferred",
    "package_name" : "openssl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "openssl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "ovmf",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "compat-openssl10",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "edk2",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "mingw-openssl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "openssl",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "shim",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "shim-unsigned-x64",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "compat-openssl11",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "edk2",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "shim",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "shim-unsigned-aarch64",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "shim-unsigned-x64",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Hardened Images 1",
    "fix_state" : "Not affected",
    "package_name" : "openssl",
    "cpe" : "cpe:/a:redhat:hummingbird:1"
  }, {
    "product_name" : "Red Hat JBoss Core Services",
    "fix_state" : "Fix deferred",
    "package_name" : "openssl",
    "cpe" : "cpe:/a:redhat:jboss_core_services:1"
  }, {
    "product_name" : "Red Hat OpenShift Container Platform 4",
    "fix_state" : "Fix deferred",
    "package_name" : "rhcos",
    "cpe" : "cpe:/a:redhat:openshift:4"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2026-22796\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-22796" ],
  "name" : "CVE-2026-22796",
  "mitigation" : {
    "value" : "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
    "lang" : "en:us"
  },
  "csaw" : false
}