{
  "cveId": "CVE-2026-17508",
  "url": "https://patchblox.com/security/cve/CVE-2026-17508",
  "summary": "CVE-2026-17508 is fixed in bouncycastle on 1 platform, first by DEBIAN-CVE-2026-17508, released October 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "bouncycastle: This update for bouncycastle fixes the following issues:\n\n- CVE-2026-17507: negative signed leaf_index values from un...",
  "description": "This update for bouncycastle fixes the following issues:\n\n- CVE-2026-17507: negative signed leaf_index values from unsigned wire encodings can cause heap exhaustion\n  (bsc#1284075).\n- CVE-2026-17508: unbounded KDF iteration and memory parameters can cause resource exhaustion (bsc#1284073).\n- CVE-2026-18036: variable-time modulo and division operations in NTRU implementation can allow timing side-channel\n  attacks (bsc#1284065).\n- CVE-2026-18040: table lookups and variable-time duplicate scanning in HQC can cause cache side-channel leaks\n  (bsc#1284205).\n- CVE-2026-71885: unbound X.509 certificates in MLS LeafNode verification can cause identity impersonation and group\n  message interception (bsc#1284165).\n- CVE-2026-71886: unvalidated CERTIFY_OTHER flags in OpenPGP subkeys can cause unauthorized trust delegations and\n  identity spoofing (bsc#1284212).\n- CVE-2026-71887: missing primary key back-signature validation on subkeys can cause signature misattribution and trust\n  context spoofing (bsc#1284213).\n- CVE-2026-71888: disagreement between digestAlgorithm and authAttrs in CMS parsing can cause unauthenticated attribute\n  injection (bsc#1284215).\n- CVE-2026-71889: skipped leaf certificate evaluation in checkNameConstraints can cause X.509 name constraint bypasses\n  (bsc#1284218).\n- CVE-2026-71890: unbounded Remove proposals in external MLS commits can cause arbitrary group member eviction and\n  session takeover (bsc#1284219).\n- CVE-2026-71891: forged ECPoint curves in BLS12-381 key validation can cause aggregate signature verification bypasses\n  (bsc#1284220).\n- CVE-2026-71892: type mismatch in CMS key-transport validation can cause key-size enforcement bypasses for HKDF-derived\n  content keys (bsc#1284221).\n- CVE-2026-85515: laundered EOF exceptions in OpenPGP message stream processing can cause unregistered truncation errors\n  and integrity check bypasses (bsc#1284222).\n- CVE-2026-97873: unbounded iteration counts in legacy PBES1 and PKCS#12 PBE implementations can cause resource\n  exhaustion (bsc#1284224).\n\nChanges for bouncycastle:\n\n- Updated to version 1.86.",
  "published": "2026-10-02T08:17:01Z",
  "severity": "",
  "epss": 0.00418,
  "epssPercentile": 0.36325,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bouncycastle",
      "release": "Debian 14",
      "fixedVersion": "1.86-1",
      "fix": "DEBIAN-CVE-2026-17508",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-17508",
      "released": "2026-10-03T21:16:35Z"
    },
    {
      "platform": "linux",
      "product": "bouncycastle",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.86-160000.1.1",
      "fix": "OPENSUSE-SU-2026:22169-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22169-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "bouncycastle",
      "release": "sles 15.6",
      "fixedVersion": "1.86-150200.3.41.1",
      "fix": "SUSE-SU-2026:4797-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4797-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "bouncycastle",
      "release": "sles 15.7",
      "fixedVersion": "1.86-150200.3.41.1",
      "fix": "SUSE-SU-2026:4797-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4797-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "bouncycastle",
      "release": "sles 16.0",
      "fixedVersion": "1.86-160000.1.1",
      "fix": "SUSE-SU-2026:24461-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24461-1",
      "released": "2026-11-07T00:44:01Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}