CVE-2025-27363

Exp

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.

Published: 2025-03-11 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-27363 is rated Critical Active Threat (86.5/100): CVSS High severity, with high exploitation likelihood (EPSS 23.36%, 97th percentile). CISA KEV confirms active exploitation (added 2025-05-06) affecting FreeType / FreeType. a weakness (CWE-787) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2025-27363

Name: FreeType Out-of-Bounds Write Vulnerability · CISA KEV detail

Exploit added: 2025-05-06

Action due: 2025-05-27

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.

Exploit prediction scoring system (EPSS) score for CVE-2025-27363

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 70.34% 23.36% -46.99%
2 2026-06-06 70.76% 70.34% -0.42%
3 2026-05-24 — 70.76% —

Full EPSS history (59 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-27363

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
8.1 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]

Weakness enumeration for CVE-2025-27363

GitHub Security Advisory for CVE-2025-27363

GHSA-g8qj-jv5h-78cp · Severity: high — An out of bounds write exists in FreeType versions 2.13.0 and below when attempting to parse font...

OS Trackers for CVE-2025-27363

vendor priority summary link
alpine — CVE-2025-27363: 1 source package rows (freetype); 22 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 2, open 20. https://security.alpinelinux.org/vuln/CVE-2025-27363
debian not yet assigned CVE-2025-27363 not yet assigned priority: Debian including 1 source packages (freetype), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-27363
gentoo high CVE-2025-27363: 1 GLSA(s) (202505-07), 1 atom(s) (media-libs/freetype); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2025-27363
redhat high — https://access.redhat.com/security/cve/CVE-2025-27363
suse high CVE-2025-27363 severity important: SUSE including 284 source package names (0.3.2-1.2:libfreetype6-2.10.4-150000.4.18.1, 0.5.14-9.11:libfreetype6-2.10.4-150000.4.18.1, …), 680 product×package rows across 321 product lines (Container bci/kiwi, Container bci/openjdk, … (321 product lines)): Fixed 442, Known Affected 221, Known Not Affected 17. https://www.suse.com/security/cve/CVE-2025-27363/
ubuntu medium CVE-2025-27363 medium priority: Ubuntu including 1 source packages (freetype), 8 status rows across 8 suites (bionic, focal, jammy, noble, oracular, trusty, upstream, xenial): released 5, not-affected 3. https://ubuntu.com/security/CVE-2025-27363

Affected software / configurations for CVE-2025-27363

Vendor Product Version Raw CPE
freetype freetype <= 2.13.0 cpe:2.3:a:freetype:freetype:*:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

References for CVE-2025-27363

URL Tags
https://www.facebook.com/security/advisories/cve-2025-27363 Third Party Advisory
http://www.openwall.com/lists/oss-security/2025/03/13/1 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/11 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/12 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/2 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/3 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/13/8 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/14/1 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/14/2 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/14/3 Mailing List
http://www.openwall.com/lists/oss-security/2025/03/14/4 Mailing List
http://www.openwall.com/lists/oss-security/2025/05/06/3 Mailing List
http://www.openwall.com/lists/oss-security/2026/04/16/5 Mailing List
http://www.openwall.com/lists/oss-security/2026/04/19/3 Mailing List
https://lists.debian.org/debian-lts-announce/2025/03/msg00030.html Mailing List
https://source.android.com/docs/security/bulletin/2025-05-01 Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-27363 US Government Resource
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