{
  "cveId": "CVE-2026-93599",
  "url": "https://patchblox.com/security/cve/CVE-2026-93599",
  "summary": "CVE-2026-93599 is fixed in 9 products on 1 platform, first by RHSA-2026:85848, released September 18, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "rustls-webpki before 0.103.13 Panic via empty BIT STRING",
  "description": "rustls-webpki through 0.103.12 (and 0.104.0-alpha releases before 0.104.0-alpha.7) contains a reachable panic in bit_string_flags() in src/der.rs. The input guard fails to reject a named-bit BIT STRING whose content is exactly [0x00] (zero padding bits and no data bytes), so raw_bits.len() - 1 underflows on the empty slice and the subsequent index operation panics (subtract-with-overflow in debug, index-out-of-bounds in release). The condition is reachable through the public API BorrowedCertRevocationList::from_der() when a CRL contains an issuingDistributionPoint extension with such an onlySomeReasons value. Exploitation requires an application that explicitly opts in to CRL revocation checking by passing RevocationOptions to verify_for_usage() and that parses CRL bytes obtained from a source the attacker can influence; the default rustls configuration, which does not use RevocationOptions, is unaffected. A crafted CRL causes a denial of service via the panic. Fixed in 0.103.13 and 0.104.0-alpha.7.",
  "published": "2026-09-18T13:20:10Z",
  "severity": "Important",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Integer Underflow (Wrap or Wraparound)",
  "epss": 0.00346,
  "epssPercentile": 0.28402,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93599",
  "fixes": [
    {
      "platform": "linux",
      "product": "aws-nitro-enclaves-cli",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.5.2~git0.1c496ed-160000.1.1",
      "fix": "OPENSUSE-SU-2026:22175-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22175-1",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "aws-nitro-enclaves-cli",
      "release": "sles 15.6",
      "fixedVersion": "1.5.2~git0.1c496ed-150600.10.18.1",
      "fix": "SUSE-SU-2026:5066-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5066-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "aws-nitro-enclaves-cli",
      "release": "sles 15.7",
      "fixedVersion": "1.5.2~git0.1c496ed-150600.10.18.1",
      "fix": "SUSE-SU-2026:5066-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5066-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "aws-nitro-enclaves-cli",
      "release": "sles 16.0",
      "fixedVersion": "1.5.2~git0.1c496ed-160000.1.1",
      "fix": "SUSE-SU-2026:24467-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24467-1",
      "released": "2026-11-07T00:45:20Z"
    },
    {
      "platform": "linux",
      "product": "goose",
      "release": "RHEL 10",
      "fixedVersion": "1.45.0-1.el10_2",
      "fix": "RHSA-2026:80765",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-80765",
      "released": "2026-10-13T23:30:48Z"
    },
    {
      "platform": "linux",
      "product": "goose",
      "release": "RHEL 9",
      "fixedVersion": "0:1.45.0-1.el9_8",
      "fix": "RHSA-2026:80764",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-80764",
      "released": "2026-10-12T23:18:47Z"
    },
    {
      "platform": "linux",
      "product": "rust-rustls-webpki",
      "release": "Debian 14",
      "fixedVersion": "0.103.13\u002Bds-1",
      "fix": "DEBIAN-CVE-2026-93599",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93599",
      "released": "2026-09-19T18:30:58Z"
    },
    {
      "platform": "linux",
      "product": "rust-sequoia-sq",
      "release": "RHEL 10",
      "fixedVersion": "1.4.0.1-4.el10_2",
      "fix": "RHSA-2026:85848",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-85848",
      "released": "2026-09-18T14:23:20Z"
    },
    {
      "platform": "linux",
      "product": "rust-sequoia-sq",
      "release": "rocky 10",
      "fixedVersion": "0:1.4.0.1-4.el10_2",
      "fix": "RLSA-2026:85848",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-85848",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "rustup",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.29.1~0-160000.1.1",
      "fix": "OPENSUSE-SU-2026:22016-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22016-1",
      "released": "2026-10-02T19:31:21Z"
    },
    {
      "platform": "linux",
      "product": "rustup",
      "release": "sles 16.0",
      "fixedVersion": "1.29.1~0-160000.1.1",
      "fix": "SUSE-SU-2026:24014-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24014-1",
      "released": "2026-10-02T19:21:30Z"
    },
    {
      "platform": "linux",
      "product": "sccache",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "0.18.0~2-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21982-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21982-1",
      "released": "2026-09-30T17:58:26Z"
    },
    {
      "platform": "linux",
      "product": "sccache",
      "release": "sles 16.0",
      "fixedVersion": "0.18.0~2-160000.1.1",
      "fix": "SUSE-SU-2026:23983-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23983-1",
      "released": "2026-09-30T17:49:13Z"
    },
    {
      "platform": "linux",
      "product": "sequoia-sq",
      "release": "almalinux 10",
      "fixedVersion": "1.4.0.1-4.el10_2",
      "fix": "ALSA-2026:85848",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-85848",
      "released": "2026-11-07T00:40:04Z"
    },
    {
      "platform": "linux",
      "product": "sequoia-sq",
      "release": "ol 10",
      "fixedVersion": "0:1.4.0.1-4.0.1.el10_2",
      "fix": "ELSA-2026-85848",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-85848",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "sequoia-sq",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.5.0-bp160.1.1",
      "fix": "OPENSUSE-RU-2026:22132-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-ru-2026-22132-1",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "shadowsocks-libev",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.3.6-bp160.3.1",
      "fix": "OPENSUSE-SU-2026:22189-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22189-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "shadowsocks-rust",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.25.0-bp160.1.1",
      "fix": "OPENSUSE-SU-2026:22189-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22189-1",
      "released": "2026-11-07T00:47:19Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}