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CVE-2023-5728

HIGH
7.5
CVSS Score
Published: October 24, 2023 at 12:47 PM UTC
Updated: June 17, 2026 at 06:49 AM UTC
4 products affected across 2 vendorsDebian LinuxFirefoxThunderbird

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

During garbage collection extra operations were performed on a object that should not be. This could have led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

Affected

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

Debian Linux· Debiandrupal
95%
10.011.0
Firefox· Mozilla
95%
v < 119
Affected range stops below 119, so it looks safe — our inference, not a vendor statement
Affected range stops below 119.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
95%
v < 115.4
Affected range stops below 115.4, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 115.4.1
Affected range stops below 115.4.1, so it looks safe — our inference, not a vendor statement

References (8)

Issue TrackingVendor Advisory
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1852729
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/10/msg00037.html
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/10/msg00042.html
Mailing ListThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2023/dsa-5535
Third Party Advisory
Source: [email protected]
https://www.debian.org/security/2023/dsa-5538
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-45/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-46/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2023-47/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

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

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-416

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