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CVE-2024-3861

MEDIUM
4
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
MEDIUM4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

If an AlignedBuffer were assigned to itself, the subsequent self-move could result in an incorrect reference count and later use-after-free. 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 < 115.0v < 125v < 125.0
Affected range stops below 115.0, 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 < 115.0v < 115.10
Affected range stops below 115.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 115.10, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
60%
v < 115.10
Affected range stops below 115.10, 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 (6)

Issue Tracking
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1883158
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2024/04/msg00012.html
Mailing ListThird Party Advisory
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 automatablePartial impact

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

CVSS

4MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-416

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