Moderate Vulnerability in RRDtool Packages: Stack Buffer Overflow Risk
Summary
ALSA-2026:33731: Moderate: rrdtool security update. Affects python3-rrdtool versions < 1.8.0-21.el10_2. Fixed in 1.8.0-21.el10_2. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
Background
RRDtool is a high-performance data logging and graphing utility designed for storing and displaying time-series data, such as network bandwidth and server load averages. It is widely used due to its ability to manage data compactly and generate useful graphs. However, it has been found to have a security vulnerability that could allow local privilege escalation.
Vulnerability Detail
The vulnerability arises from a stack buffer overflow in the handle_request_create() function of rrdcached. This flaw allows attackers to exploit unbounded Data Source (DS) and Round Robin Archive (RRA) arguments, potentially leading to local privilege escalation. If successfully exploited, an attacker could gain unauthorized access to system resources, compromising the integrity and confidentiality of the system.
How To Fix
Minimum fixed version
1.8.0-21.el10_2
This is the first release that contains the fix.
sudo dnf update python3-rrdtoolTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, you can restrict access to the rrdcached service or limit the input parameters to prevent exploitation until the package is updated. However, this is not a permanent solution and updating the package is strongly recommended.
Conclusion
The RRDtool vulnerability presents a moderate risk due to a stack buffer overflow that could lead to local privilege escalation. It is crucial to update the affected packages to the patched version to mitigate this risk. Users are encouraged to monitor their systems and apply the necessary updates promptly.
See every vulnerability recorded for python3-rrdtool →
FAQ
RRDtool is a utility for logging and graphing time-series data, commonly used for monitoring network bandwidth and server performance.
The vulnerability allows for a stack buffer overflow, which can lead to local privilege escalation, potentially allowing unauthorized access to system resources.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If you cannot update the package, consider restricting access to the rrdcached service and limiting input parameters as a temporary workaround.
More information can be found on the CVE page for CVE-2026-43958, which details the vulnerability and its implications.
Related vulnerabilities
Recent vulnerabilities recorded for python3-rrdtool.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
