CVE-2025-27363: FreeType Out-of-Bounds Write Vulnerability
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
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.
Description quoted from the CVE record (assigned by facebook, published 2025-03-11).
Weakness: CWE-787 Out-of-bounds Write
How it can be exploited
Exploitable over the network with high attack complexity needing no privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C/CR:H/IR:H/AR:H/MAV:N/MAC:L/MPR:N/MUI:N/MS:U/MC:H/MI:H/MA:H
CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.
- On CISA KEV since
- 2025-05-06
- US federal deadline
- 2025-05-27
- Ransomware use
- Not known
Public exploit evidence (Exploit Observer)
Also known as: BDU:2025-02719, CNNVD-202503-1204, EUVD-2025-6367, GHSA-2mhw-8qcg-gr96, GHSA-g8qj-jv5h-78cp, SNYK-AMZN2-FREETYPE-9599477, SNYK-CENTOS7-FREETYPE-9454341, SNYK-CENTOS7-FREETYPEDEVEL-9454339, SNYK-DEBIAN11-FREETYPE-9402510, SNYK-DEBIAN12-FREETYPE-9402511, SNYK-DEBIAN13-FREETYPE-9402513, SNYK-DEBIANUNSTABLE-FREETYPE-9402512, SNYK-ORACLE7-FREETYPE-9688128, SNYK-ORACLE8-FREETYPE-9597944, SNYK-RHEL8-FREETYPE-9575154, SNYK-RHEL8-JAVA17OPENJDKJAVADOC-9454019, SNYK-RHEL8-JAVA17OPENJDKSLOWDEBUG-9454039, SNYK-RHEL8-SPICECLIENTWINX64-10075088, SNYK-UBUNTU2004-FREETYPE-9402627, SNYK-UBUNTU2204-FREETYPE-9402628
VEDAS cluster: VEDAS:ASHENBRAND
Exploit Observer links 3 pieces of public exploit code or detection modules that name this CVE or one of its aliases.
Exploit code and modules (3)
Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.
- Code repository: https://github.com/ov3rf1ow/cve-2025-27363
- Code repository: https://github.com/tin-z/cve-2025-27363
- Code repository: https://github.com/zhuowei/cve-2025-27363-proof-of-concept
Vulnerability databases and vendor advisories (29)
Catalogue entries, not exploit evidence.
- Vulnerability database or vendor advisory: https://access.redhat.com/security/cve/cve-2025-27363
- Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-6367
- Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-2mhw-8qcg-gr96
- Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-g8qj-jv5h-78cp
- Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-27363
- Vulnerability database or vendor advisory: https://osv.dev/vulnerability/GHSA-2mhw-8qcg-gr96
- Vulnerability database or vendor advisory: https://osv.dev/vulnerability/ROOT-OS-ALPINE-315-CVE-2025-27363
- Vulnerability database or vendor advisory: https://osv.dev/vulnerability/UBUNTU-CVE-2025-27363
- Vulnerability database or vendor advisory: https://security.snyk.io/vuln/SNYK-AMZN2-FREETYPE-9599477
- Vulnerability database or vendor advisory: https://security.snyk.io/vuln/SNYK-CENTOS7-FREETYPE-9454341
- Vulnerability database or vendor advisory: https://security.snyk.io/vuln/SNYK-CENTOS7-FREETYPEDEVEL-9454339
- Vulnerability database or vendor advisory: https://security.snyk.io/vuln/SNYK-DEBIAN11-FREETYPE-9402510
- and 17 more
70 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.
VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.
Live scores
- EPSS
- 0.278
likely to be attacked soon - VEDAS
- 0.975
strong exploit evidence - On CISA KEV
- Yes, since 2025-05-06
- Detection rule
- None yet
Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish. The vertical line is the day CISA added it to its exploited list.
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| FreeType FreeType | from 0.0.0 up to and including 2.13.0 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
Exploit Observer also maps it to: freetype freetype.
How to fix it
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor guidance:
- https://source.android.com/docs/security/bulletin/2025-05-01 (vendor-advisory)
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
References
Vendor advisories and patches
- https://source.android.com/docs/security/bulletin/2025-05-01 (vendor-advisory)
Government sources
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-27363 (government-resource)
Other references
- https://www.facebook.com/security/advisories/cve-2025-27363 (x_refsource_CONFIRM)
- http://www.openwall.com/lists/oss-security/2025/03/13/1
- http://www.openwall.com/lists/oss-security/2025/03/13/2
- http://www.openwall.com/lists/oss-security/2025/03/13/3
- http://www.openwall.com/lists/oss-security/2025/03/13/8
- http://www.openwall.com/lists/oss-security/2025/03/13/11
- http://www.openwall.com/lists/oss-security/2025/03/13/12
- http://www.openwall.com/lists/oss-security/2025/03/14/1
- http://www.openwall.com/lists/oss-security/2025/03/14/2
- http://www.openwall.com/lists/oss-security/2025/03/14/3
- http://www.openwall.com/lists/oss-security/2025/03/14/4
- https://lists.debian.org/debian-lts-announce/2025/03/msg00030.html
3 more
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.