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CVE-2024-3864

HIGH
8.1
CVSS Score
Published: April 16, 2024 at 03:14 PM UTC
Updated: June 17, 2026 at 07:45 AM UTC
4 products affected across 2 vendorsDebian LinuxFirefoxThunderbird

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Severity
HIGH8.1
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

Description

Memory safety bug present in Firefox 124, Firefox ESR 115.9, and Thunderbird 115.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Affected

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

Debian Linux· Debiandrupal
95%
10.0
Firefox· Mozilla
95%
v ≤ 124v < 115.10.0v < 125v < 125.0
Affected range stops below 115.10.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 125, so it looks safe — our inference, not a vendor statement
Affected range stops below 125.0, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v ≤ 115.9v < 115.10v < 115.10.0
Affected range stops below 115.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 115.10.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
60%
v ≤ 115.9v < 115.10
Affected range stops below 115.10, so it looks safe — our inference, not a vendor statement

References (6)

ExploitIssue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1888333
Mailing List
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2024/04/msg00012.html
Mailing List
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2024/04/msg00013.html
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-18/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-19/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-20/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

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

CVSS

8.1HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-119

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