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Fencer Intel
critical 9.3

CVE-2025-53391 json

The Debian zuluPolkit/CMakeLists.txt file for zuluCrypt through the zulucrypt_6.2.0-1 package has insecure PolicyKit allow_any/allow_inacti…

published last yr. modified 4mo ago also EUVD-2025-19461

cvss
9.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

The Debian zuluPolkit/CMakeLists.txt file for zuluCrypt through the zulucrypt_6.2.0-1 package has insecure PolicyKit allow_any/allow_inactive/allow_active settings that allow a local user to escalate their privileges to root.

Patch / fix

  • zulucrypt Ubuntu Pro 18.04 LTS 5.4.0-2ubuntu0.1~esm2
  • zulucrypt Ubuntu Pro 20.04 LTS 5.7.0-1ubuntu0.1~esm1
  • zulucrypt Ubuntu Pro 22.04 LTS 5.7.1-2ubuntu0.1~esm1
  • zulucrypt Ubuntu Pro 24.04 LTS 6.2.0-1ubuntu3+esm1

ubuntu advisories UBUNTU-CVE-2025-53391

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2025-53391 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-53391 updated cvss 9.3

zulucrypt: ZuluCrypt PolicyKit Privilege Escalation

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.debian.org https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1108288 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

  • Debian zulucrypt

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.