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Vulnerabilities

Vulnerability · CVE-2025-27363

FreeType Out-of-Bounds Write Vulnerability

Published Mar 11, 2025 · catalog updated Jun 17, 2026 · Arch Linux Arch Linux

Patch now

CVE-2025-27363 is in the CISA known-exploited catalog, due May 27, 2025. Confirm Arch Linux Arch Linux against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High8.1
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
27.77%
Remediation
Remediation guidance
Affected products
cpe debian/debian linux · cpe freetype/freetype · vendor FreeType FreeType

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe debian/debian linux11.0
  • cpe freetype/freetypeversion unspecified
  • vendor FreeType FreeTypeversion unspecified

How to fix CVE-2025-27363

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-27363 is in the CISA known-exploited catalog, due May 27, 2025. Confirm Arch Linux Arch Linux against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with debian/debian linux 11.0. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-787: Out-of-bounds Write. EPSS 27.77%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 11, 2025 · Catalog

    Detected

    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

  2. May 6, 2025 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  3. May 27, 2025 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  4. Jun 17, 2026 · Catalog

    Updated

    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

Sources

  • Amazon LinuxVendor advisoryCVE-2025-27363

    CVE-2025-27363

    alas.aws.amazon.com
  • Android Security BulletinsVendor advisoryCVE-2025-27363

    Android Security Bulletin—May 2025 | Android Open Source Project

    source.android.com
  • Arch Linux SecurityVendor advisoryCVE-2025-27363

    CVE-2025-27363 is named on the public Arch Linux Security page.

    security.archlinux.org
  • CISA KEVConfirmed exploitationCVE-2025-27363

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2025-27363

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-27363

    30-day exploitation probability 27.8%

    first.org
  • NIST NVDVulnerability recordCVE-2025-27363

    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 lo

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2025-27363

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.