CVE-2019-11757
Mozilla: Use-after-free when creating index updates in IndexedDB
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 22, 2019
Updated · November 22, 2025
Description
A use-after-free flaw was found in Mozilla Firefox and Thunderbird. When following a value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. An attacker could use this flaw to execute code that was stored in the referenced memory or crash the system.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-416 · Use After Free