Allocation of Resources Without Limits or Throttling Affecting firefox-esr package, versions <140.9.0esr-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.1% (28th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOXESR-15792971
  • published27 Mar 2026
  • disclosed15 Sept 2025

Introduced: 15 Sep 2025

CVE-2025-59375  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox-esr to version 140.9.0esr-1 or higher.

NVD Description

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

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

CVSS Base Scores

version 3.1