CVE-2026-3283 Overview
A vulnerability has been discovered in libvips version 8.19.0, a popular image processing library. The vulnerability affects the function vips_extract_band_build located in the file libvips/conversion/extract.c. Manipulation of the extract_band argument can lead to an out-of-bounds read condition. This vulnerability requires local access to exploit and has been publicly disclosed.
Critical Impact
Local attackers can trigger an out-of-bounds read in libvips 8.19.0 by manipulating the extract_band argument, potentially leading to information disclosure or application crashes.
Affected Products
- libvips version 8.19.0
- Applications and services utilizing libvips 8.19.0 for image processing
Discovery Timeline
- 2026-02-27 - CVE-2026-3283 published to NVD
- 2026-03-02 - Last updated in NVD database
Technical Details for CVE-2026-3283
Vulnerability Analysis
This out-of-bounds read vulnerability exists within the image band extraction functionality of libvips. The vips_extract_band_build function in libvips/conversion/extract.c fails to properly validate the extract_band argument before using it as an index or offset for memory operations. When an attacker provides a maliciously crafted value for this parameter, the function attempts to read memory beyond the allocated buffer boundaries.
Out-of-bounds read vulnerabilities like this one (CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer) can result in information disclosure by exposing sensitive data from adjacent memory regions, or potentially cause application crashes when attempting to access invalid memory addresses.
Root Cause
The root cause of this vulnerability stems from insufficient bounds checking in the vips_extract_band_build function. The code does not adequately validate that the extract_band argument falls within the acceptable range for the image data being processed. This allows manipulation of the argument to reference memory locations outside the intended buffer, leading to an out-of-bounds read condition.
Attack Vector
The attack requires local access to the target system. An attacker must be able to invoke libvips functionality with crafted arguments, either through direct API calls or by providing malicious input to applications that use the library for image processing. The exploit has been disclosed publicly, making the attack methodology more accessible.
The vulnerability manifests when processing image band extraction operations. The extract_band parameter controls which color channels or data bands are extracted from an image, and improper handling of boundary conditions allows reading beyond allocated memory. Technical details regarding the exploitation methodology can be found in GitHub Issue #4880.
Detection Methods for CVE-2026-3283
Indicators of Compromise
- Unexpected crashes or segmentation faults in applications using libvips for image processing
- Anomalous memory access patterns in processes utilizing vips_extract_band_build functionality
- Error logs indicating memory access violations during image band extraction operations
Detection Strategies
- Monitor for processes loading libvips version 8.19.0 through library dependency scanning
- Implement runtime application self-protection (RASP) to detect out-of-bounds memory access attempts
- Use Software Composition Analysis (SCA) tools to identify vulnerable libvips installations across your environment
- Deploy memory sanitizers (AddressSanitizer, MemorySanitizer) in development and testing environments to catch exploitation attempts
Monitoring Recommendations
- Enable detailed logging for applications utilizing libvips image processing functionality
- Monitor system logs for unexpected application terminations related to image processing workflows
- Configure alerting for memory violation events in processes that depend on libvips
- Implement file integrity monitoring for libvips library files to detect unauthorized modifications
How to Mitigate CVE-2026-3283
Immediate Actions Required
- Upgrade libvips to a patched version that includes commit 24795bb3d19d84f7b6f5ed86451ad556c8f2fe70
- Audit systems to identify all applications and services using libvips 8.19.0
- Restrict local access to systems running vulnerable libvips versions until patches can be applied
- Consider temporarily disabling image band extraction functionality if feasible for your use case
Patch Information
The libvips development team has released a patch addressing this vulnerability. The fix is identified by commit 24795bb3d19d84f7b6f5ed86451ad556c8f2fe70. Organizations should apply this patch by updating to the latest libvips release or by applying the commit directly to their installations.
For detailed information about the patch, refer to:
Workarounds
- Limit local access to systems running vulnerable libvips installations to trusted users only
- Implement input validation at the application layer before passing arguments to libvips functions
- Deploy application-level sandboxing to limit the impact of potential exploitation
- Monitor and restrict the execution of image processing operations to authorized processes
# Verify your libvips version
vips --version
# Check if the patch has been applied by verifying the commit
cd /path/to/libvips
git log --oneline | grep "24795bb"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
