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Fencer Vulns
medium 6.7

CVE-2025-7519 json

Polkit: xml policy file with a large number of nested elements may lead to out-of-bounds write

published 2025-07-14 15 mo ago modified 2026-11-05 3 d ago also EUVD-2025-21350

cvss
6.7
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 12%
public exploits
0
none known

Summary

A flaw was found in polkit. When processing an XML policy with 32 or more nested elements in depth, an out-of-bounds write can be triggered. This issue can lead to a crash or other unexpected behavior, and arbitrary code execution is not discarded. To exploit this flaw, a high-privilege account is needed as it's required to place the malicious policy file properly.

Patch / fix

  • policykit-1 Debian 14 127-1

debian advisories DEBIAN-CVE-2025-7519

  • policykit-1 Ubuntu 22.04 LTS 0.105-33ubuntu0.1
  • policykit-1 Ubuntu 24.04 LTS 124-2ubuntu1.24.04.3
  • policykit-1 Ubuntu 25.10 126-2ubuntu0.1

ubuntu advisories UBUNTU-CVE-2025-7519

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

  • polkit Linux Micro 6.1 121-slfo.1.1_2.1
  • polkit Linux Micro 6.0 121-3.1
  • polkit SLES for SAP 15 SP4, SLES for SAP 15 SP3, SLES 15 SP4-LTSS +11 more 0.116-150200.3.15.1
  • polkit SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Module for Basesystem 15 SP7 +5 more 121-150500.3.6.1
  • polkit SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 0.113-5.30.1

suse advisories SUSE-SU-2025:20662-1SUSE-SU-2025:20559-1SUSE-SU-2025:02528-1SUSE-SU-2025:02527-1SUSE-SU-2025:02525-1

  • polkit openSUSE Tumbleweed 127-3.1

opensuse advisories openSUSE-SU-2026:10453-1

  • polkit CBL-Mariner 2.0 0.119-4
  • polkit Azure Linux 3.0 123-3

azure linux advisories AZL-65379AZL-65415

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2025-7519 updated cvss 6.7

polkit: XML policy file with a large number of nested elements may lead to out-of-bounds write

  • Red Hat Enterprise Linux 6 polkit, polkit-desktop-policy Red Hat Enterprise Linux 7 polkit
    affected: workaround, no fix planned “There's no known mitigation to this vulnerability other than avoiding the implementation of unknown or untrusted polkit policy files to the system.”
  • Red Hat Enterprise Linux 8 polkit, polkit-libs Red Hat Enterprise Linux 9 polkit, polkit-libs Red Hat Enterprise Linux 10 polkit Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “There's no known mitigation to this vulnerability other than avoiding the implementation of unknown or untrusted polkit policy files to the system.”

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
none
Automatable
no
Technical impact
total
Assessed
15 mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness

References

Sources

Fencer Vulns 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.