Incorrect handle could lead to sandbox escapes

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-2857
StatePUBLISHED
Assignermozilla
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-03-27 14:15:55 UTC
Updated2026-04-13 15:16:56 UTC
DescriptionFollowing the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code. A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape. The original vulnerability was being exploited in the wild. *This only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability was fixed in Firefox 136.0.4, Firefox ESR 128.8.1, and Firefox ESR 115.21.1.

Risk And Classification

Primary CVSS: v3.1 10 CRITICAL from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Problem Types: NVD-CWE-noinfo | CWE-668 | CWE-668 CWE-668 Exposure of Resource to Wrong Sphere

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mozilla Firefox All All All All
Application Mozilla Firefox All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mozilla Firefox unaffected 115.21.1 115.* rpm Not specified
CNA Mozilla Firefox unaffected 128.8.1 128.* rpm Not specified
CNA Mozilla Firefox unaffected 136.0.4 * rpm Not specified

References

ReferenceSourceLinkTags
issues.chromium.org/issues/405143032 [email protected] issues.chromium.org Permissions Required
www.cve.org/CVERecord [email protected] www.cve.org Third Party Advisory
www.mozilla.org/security/advisories/mfsa2025-19 [email protected] www.mozilla.org Vendor Advisory
bugzilla.mozilla.org/show_bug.cgi [email protected] bugzilla.mozilla.org Permissions Required
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Andrew McCreight (en)

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