CVE-2024-7527

moderate-risk

Published 2024-08-06

Unexpected marking work at the start of sweeping could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.

Do I need to act?

0.24% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 8.8/10 High

NETWORK / LOW complexity

Affected Products (5)

Firefox

Firefox Esr

Thunderbird

Affected Vendors

Mozilla

References (6)

Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1871303

Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2024-33/

Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2024-34/

Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2024-35/

Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2024-37/

Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2024-38/

/ 100

moderate-risk

Severity 30/34 · Critical

Exploitability 1/34 · Minimal

Exposure 12/34 · Low