CVE-2018-19876: cairographics cairo Use After Free

Vulnerability summary

CVE-2018-19876 is a medium (CVSS 6.5) Use After Free vulnerability in cairographics cairo. EPSS estimates a 1.71% chance of exploitation in the next 30 days, higher than 76.9% of scored vulnerabilities.

Timeline

1. 05-12-2018
   PublishedVulnerability first disclosed.
2. 15-10-2026
   Last modifiedVulnerability information updated.

Description

cairo 1.16.0, in cairo_ft_apply_variations() in cairo-ft-font.c, would free memory using a free function incompatible with WebKit's fastMalloc, leading to an application crash with a "free(): invalid pointer" error.

• 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.