CVE-2023-29535

MEDIUM

6.5

CVSS Score

Published: June 2, 2023 at 12:00 AM UTC

Updated: October 24, 2026 at 01:10 PM UTC

5 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.7%

SSVC

PoC

Description

Following a Garbage Collector compaction, weak maps may have been accessed before they were correctly traced. This resulted in memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

Affected

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

Firefox · Mozilla

95%

v < 112.0

Affected range stops below 112, so it looks safe — our inference, not a vendor statement

Affected range stops below 112.0, so it looks safe — our inference, not a vendor statement

Firefox ESR · Mozilla

95%

v < 102.10

Affected range stops below 102.10, so it looks safe — our inference, not a vendor statement

Firefox Mobile · Mozilla

95%

v < 112.0

Affected range stops below 112.0, so it looks safe — our inference, not a vendor statement

Focus · Mozilla

95%

v < 112.0

Affected range stops below 112, so it looks safe — our inference, not a vendor statement

Affected range stops below 112.0, so it looks safe — our inference, not a vendor statement

Thunderbird · Mozilla

95%

v < 102.10

Affected range stops below 102.10, 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 (4)

Issue Tracking

Source: [email protected]

https://bugzilla.mozilla.org/show_bug.cgi?id=1820543

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-13/

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-14/

Vendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2023-15/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

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

CVSS

6.5MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-noinfo

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