CVE-2025-9179CRITICAL 9.8EPSS p40.5%

CVE-2025-9179CVE-2025-9179

Description

An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.53% probability of exploitation · percentile 40.5% · 2026-06-19T12:03:05Z
Published2025-08-19
Last modified2026-04-13

Underlying weaknesses· 1

CWE-119

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=1979527
  2. https://www.mozilla.org/security/advisories/mfsa2025-64/
  3. https://www.mozilla.org/security/advisories/mfsa2025-65/
  4. https://www.mozilla.org/security/advisories/mfsa2025-66/
  5. https://www.mozilla.org/security/advisories/mfsa2025-67/
  6. https://www.mozilla.org/security/advisories/mfsa2025-70/
  7. https://www.mozilla.org/security/advisories/mfsa2025-71/
  8. https://www.mozilla.org/security/advisories/mfsa2025-72/

1

TypeTargetConfidenceTier
WeaknessImproper Restriction of Operations within the Bounds of a Memory Buffercwe-1190%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.