CVE-2023-29536: mozilla firefox Use After Free

Vulnerability summary

CVE-2023-29536 is a high (CVSS 8.8) Use After Free vulnerability in mozilla firefox. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 52.3% of scored vulnerabilities.

Timeline

1. 02-06-2023
   PublishedVulnerability first disclosed.
2. 09-01-2025
   Last modifiedVulnerability information updated.

Description

An attacker could cause the memory manager to incorrectly free a pointer that addresses attacker-controlled memory, resulting in an assertion, memory corruption, or 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.

• CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.