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CVE-2024-9403

HIGH
7.3
CVSS Score
Published: October 1, 2024 at 03:13 PM UTC
Updated: June 17, 2026 at 08:24 AM UTC
2 products affected across 1 vendorFirefoxThunderbird

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Severity
HIGH7.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Memory safety bugs present in Firefox 130. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 131 and Thunderbird < 131.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox· Mozilla
95%
v < 131
Affected range stops below 131, so it looks safe — our inference, not a vendor statement
Affected range stops below 131.0, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 131
Affected range stops below 131, so it looks safe — our inference, not a vendor statement
Affected range stops below 131.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Issue Tracking
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1917807
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-46/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-50/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-119

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