Integer underflow in Freetype before 2.2 allows remote attackers to cause a denial of service (crash) via a font file with an odd number of
Integer underflow in Freetype before 2.2 allows remote attackers to cause a denial of service (crash) via a font file with an odd number of blue values, which causes the underflow when decrementing by 2 in a context that assumes an even number of values.
- Published
- May 23, 2006
- Updated
- Jun 16, 2026
- EPSS
- 12.7% · 96th percentile
- CWE
- CWE-189
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Report tools
Action score
24
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 4 / 30 · 12.7%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| freetype | freetype | cpe:2.3:a:freetype:freetype |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- freetype freetypeup to 2.1 inclusive
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | freetype | before 2.2.1-1 | 2.2.1-1 |
| Debian:3.0 | freetype | before 2.0.9-1woody1 | 2.0.9-1woody1 |
| Debian:3.1 | freetype | before 2.1.7-2.5 | 2.1.7-2.5 |
| Red Hat:enterprise_linux:3::as | freetype | before 0:2.1.4-4.0.rhel3.2 | 0:2.1.4-4.0.rhel3.2 |
| Red Hat:enterprise_linux:3::as | freetype-debuginfo | before 0:2.1.4-4.0.rhel3.2 | 0:2.1.4-4.0.rhel3.2 |
| Red Hat:enterprise_linux:3::as | freetype-devel | before 0:2.1.4-4.0.rhel3.2 | 0:2.1.4-4.0.rhel3.2 |
| Red Hat:enterprise_linux:4::as | freetype | before 0:2.1.9-1.rhel4.4 | 0:2.1.9-1.rhel4.4 |
| Red Hat:enterprise_linux:4::as | freetype-debuginfo | before 0:2.1.9-1.rhel4.4 | 0:2.1.9-1.rhel4.4 |
| Red Hat:enterprise_linux:4::as | freetype-demos | before 0:2.1.9-1.rhel4.4 | 0:2.1.9-1.rhel4.4 |
| Red Hat:enterprise_linux:4::as | freetype-devel | before 0:2.1.9-1.rhel4.4 | 0:2.1.9-1.rhel4.4 |
| Red Hat:enterprise_linux:4::as | freetype-utils | before 0:2.1.9-1.rhel4.4 | 0:2.1.9-1.rhel4.4 |
Same product
freetype: all recordsOther highest-scoring records for the same primary product.
- CVE-2025-27363An out of bounds write exists in FreeType versions 2.13.0 and below (newer versions of FreeType are not vulnerable) when attempting to parseKEV70This week
- CVE-2012-1126FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products, allows remote attackers to cause a denial of serv42Plan
- CVE-2022-27404FreeType commit 1e2eb65048f75c64b68708efed6ce904c31f3b2f was discovered to contain a heap buffer overflow via the function sfnt_init_face.40Plan
- CVE-2015-9290In FreeType before 2.6.1, a buffer over-read occurs in type1/t1parse.c on function T1_Get_Private_Dict where there is no check that the new 40Plan
- CVE-2017-8287FreeType 2 before 2017-03-26 has an out-of-bounds write caused by a heap-based buffer overflow related to the t1_builder_close_contour funct40Plan
- CVE-2017-8105FreeType 2 before 2017-03-24 has an out-of-bounds write caused by a heap-based buffer overflow related to the t1_decoder_parse_charstrings f40Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:freetype | 2.2.1-1 · Debian:12 | Package registry (OSV) |
| red hat:freetype | 0:2.1.4-4.0.rhel3.2 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:freetype-debuginfo | 0:2.1.4-4.0.rhel3.2 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:freetype-demos | 0:2.1.9-1.rhel4.4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
| red hat:freetype-devel | 0:2.1.4-4.0.rhel3.2 · Red Hat:enterprise_linux:3::as | Package registry (OSV) |
| red hat:freetype-utils | 0:2.1.9-1.rhel4.4 · Red Hat:enterprise_linux:4::as | Package registry (OSV) |
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2006-06-08 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- First PoC+16 d
- TodaySep 30, 2026+7436 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
CWE-189 · Numeric ErrorsCVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
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References
- ftp://patches.sgi.com/support/free/security/advisories/20060701-01-U
- lists.apple.com/archives/security-announce/2009/May/msg00002.html
- lists.suse.com/archive/suse-security-announce/2006-Jun/0012.html
- secunia.com/advisories/20525
- secunia.com/advisories/20591
- secunia.com/advisories/20638
- secunia.com/advisories/20791
- secunia.com/advisories/21062
- secunia.com/advisories/21135
- secunia.com/advisories/21385
- secunia.com/advisories/21701
- secunia.com/advisories/23939
- secunia.com/advisories/35074
- securitytracker.com/id?1016522
- sunsolve.sun.com/search/document.do?assetkey=1-26-102705-1
- support.apple.com/kb/HT3549
- support.avaya.com/elmodocs2/security/ASA-2006-176.htm
- www.debian.org/security/2006/dsa-1095
- www.mandriva.com/security/advisories?name=MDKSA-2006:099
- www.redhat.com/support/errata/RHSA-2006-0500.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.