// For flags

CVE-2025-9179

thunderbird: firefox: Sandbox escape due to invalid pointer in the Audio/Video: GMP component

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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 affects Firefox < 142, Firefox ESR < 115.27, Firefox ESR < 128.14, Firefox ESR < 140.2, Thunderbird < 142, Thunderbird < 128.14, and Thunderbird < 140.2.

A flaw was found in Thunderbird and Firefox. The Mozilla Foundation's Security Advisory describes the following issue: An attacker is able to perform memory corruption in the GMP process which process encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process.

Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, sandbox escape or bypass of the same-origin policy. For the oldstable distribution (bookworm), these problems have been fixed in version 128.14.0esr-1~deb12u1. For the stable distribution (trixie), these problems have been fixed in version 128.14.0esr-1~deb13u1.

*Credits: Oskar
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2025-08-19 CVE Reserved
  • 2025-08-19 CVE Published
  • 2025-08-20 CVE Updated
  • 2025-08-25 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mozilla
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 Firefox
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*-
Affected
Mozilla
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 Firefox Esr
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*-
Affected
Mozilla
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 Thunderbird
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*-
Affected
Canonical
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 Ubuntu Linux
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*-
Affected
Centos
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 Centos
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Affected
Debian
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 Debian Linux
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Affected
Fedoraproject
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 Fedora
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Affected
Redhat
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 Enterprise Linux
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Affected
Slackware
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 Slackware Linux
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*-
Affected