{
  "cveId": "CVE-2026-78422",
  "url": "https://patchblox.com/security/cve/CVE-2026-78422",
  "summary": "CVE-2026-78422 is fixed in rust-zbus-polkit on 1 platform by DEBIAN-CVE-2026-78422 (version 5.1.0-1), released September 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "rust-zbus-polkit: Subject::new_for_owner() in the zbus_polkit crate encodes the uid entry of a unix-process polkit subject as an unsign...",
  "description": "Subject::new_for_owner() in the zbus_polkit crate encodes the uid entry of a unix-process polkit subject as an unsigned 32-bit integer (D-Bus type u), whereas the org.freedesktop.PolicyKit1.Authority interface specifies a signed 32-bit integer (D-Bus type i). Because of this type mismatch, polkit silently discards the caller-supplied UID and instead determines the subject\u0027s owner itself by looking up the PID in /proc, a lookup that is inherently subject to a time-of-check/time-of-use race.  Consequently, an application that passes a UID obtained from a trustworthy source \u2014 for example SO_PEERCRED Unix socket peer credentials \u2014 in order to defend against PID reuse receives no protection, and the supplied UID has no effect on the authorization decision. A local unprivileged attacker who can cause an authorized process to terminate and then win the race to have their own process assigned the same PID can be authorized under the identity of the terminated process, bypassing the polkit authorization check and performing actions the attacker is not entitled to.  This issue affects zbus_polkit before 5.1.0.",
  "published": "2026-08-31T15:17:58Z",
  "severity": "",
  "epss": 0.00125,
  "epssPercentile": 0.02202,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "rust-zbus-polkit",
      "release": "Debian 14",
      "fixedVersion": "5.1.0-1",
      "fix": "DEBIAN-CVE-2026-78422",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-78422",
      "released": "2026-09-08T02:27:47Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}