CVE-2026-24811
Buffer Overflow in root-project root zlib Module (inffast.C
Publication date: 2026-01-27
Last updated on: 2026-02-19
Assigner: Government Technology Agency of Singapore Cyber Security Group (GovTech CSG)
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| root | root | to 6.34.08 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the root-project's zlib compression library, specifically in a cloned function called inflate_fast() within the inffast.c file. The issue stems from the function not having received a prior security patch that was applied to the original zlib code. The vulnerability relates to improper use of post-increment operations in the code, which could lead to security issues. A security fix was applied by replicating the patch from the original zlib repository to correct the code and eliminate the vulnerability. [1]
How can this vulnerability impact me? :
The vulnerability in the inflate_fast() function of the zlib compression library could potentially allow an attacker to exploit the improper handling of data during decompression, leading to security risks such as denial of service or execution of malicious code. Since zlib is widely used for data compression, this could impact any software relying on this library, potentially compromising system security or stability. [1]
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should apply the security patch that fixes the issue in the cloned inflate_fast() function within the root-project's zlib implementation. This patch replicates the fix from the original zlib repository (commit 9aaec95) and involves code changes in inffast.c to use post-increment operations correctly. Updating your root-project root or zlib compression library to include this patch (merged in May 2025) will close the security gap associated with CVE-2026-24811. [1]