CVE-2025-27363: FreeType Out-of-Bounds Write Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 6 May 2025, 56 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 27.8%
EPSS score, percentile 98.1 of all scored records
- How severe?
- 8.1 High
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA deadline 27 May 2025. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 0.0.0 through 2.13.0
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date for this action: 27 May 2025.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://source.android.com/docs/security/bulletin/2025-05-01
- https://nvd.nist.gov/vuln/detail/CVE-2025-27363
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | 0.0.0 through 2.13.0 |
Versions not listed are: unaffected.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
FreeType contains an out-of-bounds write vulnerability when attempting to parse font subglyph structures related to TrueType GX and variable font files that may allow for arbitrary code execution.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2025-27363 to its Known Exploited Vulnerabilities (KEV) catalog on 6 May 2025.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 27 May 2025.
- The CVE record was published on 11 Mar 2025, 56 days before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 8.1 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 27.8% (percentile 98.1), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
An out of bounds write exists in FreeType versions 2.13.0 and below (newer versions of FreeType are not vulnerable) when attempting to parse font subglyph structures related to TrueType GX and variable font files. The vulnerable code assigns a signed short value to an unsigned long and then adds a static value causing it to wrap around and allocate too small of a heap buffer. The code then writes up to 6 signed long integers out of bounds relative to this buffer. This may result in arbitrary code execution. This vulnerability may have been exploited in the wild.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 11 Mar 2025 | CVE record published |
| 6 May 2025 | Added to CISA KEV |
| 27 May 2025 | CISA due date for the required action |
| 19 Apr 2026 | CVE record last updated |