{
  "cveId": "CVE-2022-50731",
  "url": "https://patchblox.com/security/cve/CVE-2022-50731",
  "summary": "CVE-2022-50731 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50731, released December 24, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  crypto: akcipher - default implementation for se...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  crypto: akcipher - default implementation for setting a private key  Changes from v1:   * removed the default implementation from set_pub_key: it is assumed that     an implementation must always have this callback defined as there are     no use case for an algorithm, which doesn\u0027t need a public key  Many akcipher implementations (like ECDSA) support only signature verifications, so they don\u0027t have all callbacks defined.  Commit 78a0324f4a53 (\u0022crypto: akcipher - default implementations for request callbacks\u0022) introduced default callbacks for sign/verify operations, which just return an error code.  However, these are not enough, because before calling sign the caller would likely call set_priv_key first on the instantiated transform (as the in-kernel testmgr does). This function does not have a default stub, so the kernel crashes, when trying to set a private key on an akcipher, which doesn\u0027t support signature generation.  I\u0027ve noticed this, when trying to add a KAT vector for ECDSA signature to the testmgr.  With this patch the testmgr returns an error in dmesg (as it should) instead of crashing the kernel NULL ptr dereference.",
  "published": "2025-12-24T13:15:59Z",
  "severity": "",
  "epss": 0.00251,
  "epssPercentile": 0.16599,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.0.3-1",
      "fix": "DEBIAN-CVE-2022-50731",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-50731",
      "released": "2025-12-24T13:15:59Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.0.3-1",
      "fix": "DEBIAN-CVE-2022-50731",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-50731",
      "released": "2025-12-24T13:15:59Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.0.3-1",
      "fix": "DEBIAN-CVE-2022-50731",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-50731",
      "released": "2025-12-24T13:15:59Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}