CVE-2024-27929 Use After Free in SixLabors.ImageSharp
A heap-use-after-free flaw in SixLabors.ImageSharp allows attackers to disclose information via specially crafted PNG images.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2024-27929?
CVE-2024-27929 is a high-severity use after free vulnerability in SixLabors ImageSharp, published on 5 Mar 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
ImageSharp is a managed, cross-platform, 2D graphics library. A heap-use-after-free flaw was found in ImageSharp's InitializeImage() function of PngDecoderCore.cs file. This vulnerability is triggered when an attacker passes a specially crafted PNG image file to ImageSharp for conversion, potentially leading to information disclosure. This issue has been patched in versions 3.1.3 and 2.1.7.
Weakness: CWE-416
Which versions are affected by CVE-2024-27929?
4 open source packages ship an affected version, including SixLabors.ImageSharp. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
SixLabors.ImageSharp NuGet | All versions | 2.1.7 |
SixLabors.ImageSharp NuGet | All versions | 2.1.7 |
SixLabors.ImageSharp NuGet | From 3.0.0 | 3.1.3 |
SixLabors.ImageSharp NuGet | From 3.0.0 | 3.1.3 |
Products include Sixlabors Imagesharp.
How do I fix CVE-2024-27929?
Upgrade SixLabors.ImageSharp to a fixed version for your release line: 2.1.7 or 3.1.3.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2024-27929 being exploited?
There is no known exploitation of CVE-2024-27929 in the wild and no public exploit code.
Other vulnerabilities in SixLabors ImageSharp
- CVE-2026-106110 ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer
- CVE-2026-106112 ImageSharp: ICC LUT16 output channel count can write beyond Vector4
- CVE-2026-106113 ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index
- CVE-2026-106115 ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer
- CVE-2026-106117 ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows strip buffer — heap OOB write in SixLabors.ImageSharp
Sources
Also known as ECHO-4d13-a9eb-08c2, GHSA-65x7-c272-7g7r.