CVE-2023-4056: Critical severity thunderbird vulnerability
Last updated 24 July 2024
Other sources
Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
— Mozilla
Affected Software
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is CVE-2023-4056?
CVE-2023-4056 is a vulnerability related to memory safety bugs present in Firefox and Thunderbird.
Which software versions are affected by CVE-2023-4056?
CVE-2023-4056 affects Firefox versions up to and excluding 116, Firefox ESR versions up to and excluding 102.14, Thunderbird versions up to and excluding 115.1, and Thunderbird ESR versions up to and excluding 102.14.
What is the severity of CVE-2023-4056?
CVE-2023-4056 has a severity rating of 9.8, which is considered critical.
How can I fix CVE-2023-4056?
To fix CVE-2023-4056, update your Firefox and Thunderbird installations to versions 116 (or later), 102.14 (or later), 115.1 (or later), and 102.14 (or later) respectively.
Where can I find more information about CVE-2023-4056?
You can find more information about CVE-2023-4056 in the following references: [Reference 1](https://bugzilla.mozilla.org/buglist.cgi?bug_id=1820587%2C1824634%2C1839235%2C1842325%2C1843847), [Reference 2](https://www.mozilla.org/en-US/security/advisories/mfsa2023-33/), [Reference 3](https://www.mozilla.org/en-US/security/advisories/mfsa2023-32/).