Security readout for executives and security teams
Plain-English summary
This is a memory-management bug in cairo 1.16.0. When used in a WebKit allocation context, cairo could release memory with the wrong allocator and crash the application. The sourced record describes availability impact, not data theft or remote code execution.
Executive priority
Handle as a targeted stability and availability issue, not an emergency breach indicator. Prioritize exposed desktop, browser, or embedded application environments where crashes affect users or service reliability.
Technical view
cairo_ft_apply_variations() in cairo-ft-font.c frees memory with a function incompatible with WebKit's fastMalloc. The reported failure is free(): invalid pointer, producing an application crash. Sources do not include CVSS, CWE, affected CPEs, or named fixed releases.
Likely exposure
Exposure is most plausible where cairo 1.16.0 is used in applications or platforms involving WebKit memory allocation behavior. The source bundle does not identify affected vendors, CPEs, distributions, or package ranges beyond cairo 1.16.0.
Exploitation context
The bundle provides no evidence of active exploitation, and KEV is false. The described outcome is a crash, so treat this primarily as an availability risk unless vendor evidence shows broader impact.
Researcher notes
The public record is sparse: no CVSS, CWE, CPEs, exploit status, or fixed release are provided. Analysis should stay tied to cairo 1.16.0, cairo_ft_apply_variations(), WebKit fastMalloc incompatibility, and the documented crash outcome.
Mitigation direction
- Check vendor or distribution advisories for cairo and WebKit package guidance.
- Prioritize updating cairo packages where cairo 1.16.0 is present.
- Avoid assuming a fixed version unless confirmed by vendor guidance.
- Track the referenced cairo merge request for remediation context.
Validation and detection
- Inventory systems and applications using cairo 1.16.0.
- Identify applications combining cairo rendering with WebKit allocation contexts.
- Review crash telemetry for free(): invalid pointer failures in affected applications.
- Confirm vendor package status against official advisories or distribution trackers.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-19876 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.webkit.org/show_bug.cgi?id=191595CVE reference · x_refsource_MISC
- https://gitlab.freedesktop.org/cairo/cairo/merge_requests/5CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.