Moderate Vulnerability in Polkit: Denial of Service via Unbounded Input Processing
Summary
RLSA-2026:59997: Moderate: polkit security update. Affects polkit versions < 0:125-4.el10_2.1. Fixed in 0:125-4.el10_2.1. How to fix ↓
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Background
Polkit is a toolkit for defining and handling authorizations in Unix-like operating systems. It allows non-privileged processes to communicate with privileged ones in a controlled manner. This functionality is essential for managing system-wide privileges securely. However, the polkit package in Rocky Linux 10 has been found to have a vulnerability that could lead to a denial of service, impacting system stability and availability.
Vulnerability Detail
The vulnerability identified as CVE-2026-4897 in the polkit package allows for a denial of service through unbounded input processing via standard input. This means that an attacker could exploit this flaw by sending excessive or malformed input to the polkit service, potentially causing it to crash or become unresponsive. The implications of this vulnerability can lead to significant disruptions in system operations, affecting all users and services relying on polkit for authorization.
How To Fix
Minimum fixed version
0:125-4.el10_2.1
This is the first release that contains the fix.
sudo dnf update polkitTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. It is advisable to apply the security update as soon as possible to mitigate the risk.
Conclusion
The polkit vulnerability CVE-2026-4897 poses a moderate risk of denial of service due to unbounded input processing. It is essential to update the polkit package to the latest version to protect your system from potential disruptions. Regular monitoring and timely updates are vital for maintaining system security.
See every vulnerability recorded for polkit →
FAQ
CVE-2026-4897 is a vulnerability in the polkit package that allows for denial of service through unbounded input processing.
This vulnerability can lead to system instability and unavailability, affecting all processes that rely on polkit for authorization.
The CVSS score for this vulnerability is 5.5, indicating a moderate severity level.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
While there are no specific workarounds, it is crucial to prioritize updating the package to mitigate the risk as soon as possible.
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