CVE-2026-112276: Netpbm rasttopnm heap out-of-bounds read in colormap handling

CVE-2026-112276 · Severity: medium · CVSS 6.1 · Published 2026-10-19

Netpbm is a suite of image conversion tools that processes various graphics formats. The rasttopnm converter reads Sun rasterfiles and can be exploited via a crafted file with a short colormap to leak adjacent heap memory into the output image or crash the program.

Technologies: Netpbm. Vendors: Netpbm.

Quick answers

Is CVE-2026-112276 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-112276 being exploited in the wild.
How severe is CVE-2026-112276?
Medium severity, with a CVSS score of 6.1, published 19 October 2026.
Which products and versions are affected?
Netpbm 11.16.00 and earlier.
Is there a fix for CVE-2026-112276?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-112276 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-112276?
Check whether you run Netpbm at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap out-of-bounds read occurs in rasttopnm's colormap handling when processing Sun rasterfiles with undersized colormaps. The vulnerability is triggered when pixel byte values exceed the colormap length, causing arbitrary heap reads up to 255 bytes beyond the allocated palette. The read data is disclosed in the converted output image.

Affected products

  • Netpbm Netpbm 11.16.00 and earlier

Timeline

  • 2026-10-19: disclosed

References

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