CVE-2026-70653 libvips: Possible heap-based buffer read overflow when decoding a well-crafted RLE Radiance image
A heap-based buffer read overflow in libvips allows attackers to disclose adjacent heap data via a crafted Radiance image.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-70653?
CVE-2026-70653 is a medium-severity vulnerability in libvips, published on 20 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
libvips is a fast image processing library with low memory needs. Prior to version 8.18.3, the old-style Radiance RLE decoder in libvips/foreign/radiance.c can process a repeat marker at the beginning of a scanline in scanline_read_old and read q[-1] before any prior pixel exists. A crafted Radiance image loaded through VipsForeignLoadRad can therefore disclose four bytes of adjacent heap data, most likely other image data. This issue is fixed in version 8.18.3.
Weakness: CWE-122
Which versions are affected by CVE-2026-70653?
How do I fix CVE-2026-70653?
Upgrade to a fixed version.
Is CVE-2026-70653 being exploited?
There is no known exploitation of CVE-2026-70653 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-70653, GHSA-fh99-55jf-5hj3, UBUNTU-CVE-2026-70653.