Integer Overflow or Wraparound Affecting nemo-gym package, versions <0.5.0_rc0_git20260729-r6


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-NEMOGYM-21707311
  • published25 Oct 2026
  • disclosed21 Oct 2026

Introduced: 21 Oct 2026

NewCVE-2026-96641  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Chainguard nemo-gym to version 0.5.0_rc0_git20260729-r6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nemo-gym package and not the nemo-gym package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Pillow is a Python imaging library. Prior to 13.0.0, PILfont text-width accumulation in src/_imaging.c checks positive glyph advances against INT_MAX but does not check negative advances against INT_MIN. Repeating a signed 16-bit advance of -32768 can therefore execute a signed C integer overflow in xsize += dx, producing a large positive width from a negative mathematical result. Applications that use getlength(), getsize(), or derived layout, quota, serialization, or allocation calculations can experience logic-integrity errors or resource consumption, while the high-level mask path commonly retains a decompression-bomb check. This issue is fixed in version 13.0.0.

CVSS Base Scores

version 3.1