Freetype
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Known Exploited Freetype Vulnerabilities
The following Freetype vulnerabilities have been marked by CISA as Known to be Exploited by threat actors.
| Title | Description | Added |
|---|---|---|
| FreeType Out-of-Bounds Write 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. CVE-2025-27363 Exploit Probability: 68.4% |
May 6, 2025 |
The vulnerability CVE-2025-27363: FreeType Out-of-Bounds Write Vulnerability is in the top 5% of the currently known exploitable vulnerabilities.
By the Year
In 2025 there have been 2 vulnerabilities in Freetype with an average score of 7.2 out of ten. Freetype did not have any published security vulnerabilities last year. That is, 2 more vulnerabilities have already been reported in 2025 as compared to last year.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2025 | 2 | 7.15 |
| 2024 | 0 | 0.00 |
| 2023 | 0 | 0.00 |
| 2022 | 3 | 8.27 |
| 2021 | 0 | 0.00 |
| 2020 | 1 | 9.60 |
| 2019 | 1 | 6.50 |
| 2018 | 1 | 6.50 |
It may take a day or so for new Freetype vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.
Recent Freetype Security Vulnerabilities
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
CVE-2025-27363
8.1 - High
- March 11, 2025
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.
FreeType 2.8.1 has a signed integer overflow in cf2_doFlex in cff/cf2intrp.c.
CVE-2025-23022
6.2 - Medium
- January 10, 2025
FreeType 2.8.1 has a signed integer overflow in cf2_doFlex in cff/cf2intrp.c.
Integer Overflow or Wraparound
FreeType commit 1e2eb65048f75c64b68708efed6ce904c31f3b2f was discovered to contain a heap buffer overflow
CVE-2022-27404
9.8 - Critical
- April 22, 2022
FreeType commit 1e2eb65048f75c64b68708efed6ce904c31f3b2f was discovered to contain a heap buffer overflow via the function sfnt_init_face.
Memory Corruption
FreeType commit 53dfdcd8198d2b3201a23c4bad9190519ba918db was discovered to contain a segmentation violation
CVE-2022-27405
7.5 - High
- April 22, 2022
FreeType commit 53dfdcd8198d2b3201a23c4bad9190519ba918db was discovered to contain a segmentation violation via the function FNT_Size_Request.
Out-of-bounds Read
FreeType commit 22a0cccb4d9d002f33c1ba7a4b36812c7d4f46b5 was discovered to contain a segmentation violation
CVE-2022-27406
7.5 - High
- April 22, 2022
FreeType commit 22a0cccb4d9d002f33c1ba7a4b36812c7d4f46b5 was discovered to contain a segmentation violation via the function FT_Request_Size.
Out-of-bounds Read
Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111
CVE-2020-15999
9.6 - Critical
- November 03, 2020
Heap buffer overflow in Freetype in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Memory Corruption
FreeType before 2.6.2 has a heap-based buffer over-read in tt_cmap14_validate in sfnt/ttcmap.c.
CVE-2015-9383
6.5 - Medium
- September 03, 2019
FreeType before 2.6.2 has a heap-based buffer over-read in tt_cmap14_validate in sfnt/ttcmap.c.
Out-of-bounds Read
An issue was discovered in FreeType 2 through 2.9
CVE-2018-6942
6.5 - Medium
- February 13, 2018
An issue was discovered in FreeType 2 through 2.9. A NULL pointer dereference in the Ins_GETVARIATION() function within ttinterp.c could lead to DoS via a crafted font file.
NULL Pointer Dereference
FreeType 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 function in psaux/psobjs.c.
CVE-2017-8287
9.8 - Critical
- April 27, 2017
FreeType 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 function in psaux/psobjs.c.
Buffer Overflow
FreeType 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 function in psaux/t1decode.c.
CVE-2017-8105
9.8 - Critical
- April 24, 2017
FreeType 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 function in psaux/t1decode.c.
Memory Corruption
FreeType 2 before 2017-03-07 has an out-of-bounds write related to the TT_Get_MM_Var function in truetype/ttgxvar.c and the sfnt_init_face function in sfnt/sfobjs.c.
CVE-2017-7858
9.8 - Critical
- April 14, 2017
FreeType 2 before 2017-03-07 has an out-of-bounds write related to the TT_Get_MM_Var function in truetype/ttgxvar.c and the sfnt_init_face function in sfnt/sfobjs.c.
Memory Corruption
FreeType 2 before 2017-03-08 has an out-of-bounds write caused by a heap-based buffer overflow related to the TT_Get_MM_Var function in truetype/ttgxvar.c and the sfnt_init_face function in sfnt/sfobjs.c.
CVE-2017-7857
9.8 - Critical
- April 14, 2017
FreeType 2 before 2017-03-08 has an out-of-bounds write caused by a heap-based buffer overflow related to the TT_Get_MM_Var function in truetype/ttgxvar.c and the sfnt_init_face function in sfnt/sfobjs.c.
Memory Corruption
FreeType 2 before 2017-02-02 has an out-of-bounds write caused by a heap-based buffer overflow related to the tt_size_reset function in truetype/ttobjs.c.
CVE-2017-7864
9.8 - Critical
- April 14, 2017
FreeType 2 before 2017-02-02 has an out-of-bounds write caused by a heap-based buffer overflow related to the tt_size_reset function in truetype/ttobjs.c.
Memory Corruption
FreeType 2 before 2016-12-16 has an out-of-bounds write caused by a heap-based buffer overflow related to the cff_parser_run function in cff/cffparse.c.
CVE-2016-10328
9.8 - Critical
- April 14, 2017
FreeType 2 before 2016-12-16 has an out-of-bounds write caused by a heap-based buffer overflow related to the cff_parser_run function in cff/cffparse.c.
Memory Corruption
The parse_charstrings function in type1/t1load.c in FreeType 2 before 2.7 does not ensure
CVE-2016-10244
7.8 - High
- March 06, 2017
The parse_charstrings function in type1/t1load.c in FreeType 2 before 2.7 does not ensure that a font contains a glyph name, which allows remote attackers to cause a denial of service (heap-based buffer over-read) or possibly have unspecified other impact via a crafted file.
Out-of-bounds Read
Stack-based buffer overflow in the cf2_hintmap_build function in cff/cf2hints.c in FreeType before 2.5.3
CVE-2014-2240
- March 12, 2014
Stack-based buffer overflow in the cf2_hintmap_build function in cff/cf2hints.c in FreeType before 2.5.3 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a large number of stem hints in a font file.
Buffer Overflow
The _bdf_parse_glyphs function in FreeType before 2.4.11
CVE-2012-5670
- January 24, 2013
The _bdf_parse_glyphs function in FreeType before 2.4.11 allows context-dependent attackers to cause a denial of service (out-of-bounds write and crash) via vectors related to BDF fonts and an ENCODING field with a negative value.
Buffer Overflow
The _bdf_parse_glyphs function in FreeType before 2.4.11 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via vectors related to BDF fonts and an incorrect calculation
CVE-2012-5669
- January 24, 2013
The _bdf_parse_glyphs function in FreeType before 2.4.11 allows context-dependent attackers to cause a denial of service (crash) and possibly execute arbitrary code via vectors related to BDF fonts and an incorrect calculation that triggers an out-of-bounds read.
Buffer Overflow
FreeType before 2.4.11
CVE-2012-5668
- January 24, 2013
FreeType before 2.4.11 allows context-dependent attackers to cause a denial of service (NULL pointer dereference and crash) via vectors related to BDF fonts and the improper handling of an "allocation error" in the bdf_free_font function.
Buffer Overflow
FreeType 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 service (invalid heap write operation and memory corruption) or possibly execute arbitrary code via crafted glyph or bitmap data in a BDF font
CVE-2012-1136
- April 25, 2012
FreeType 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 service (invalid heap write operation and memory corruption) or possibly execute arbitrary code via crafted glyph or bitmap data in a BDF font that lacks an ENCODING field.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1144
- April 25, 2012
FreeType 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 service (invalid heap write operation and memory corruption) or possibly execute arbitrary code via a crafted TrueType font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1143
- April 25, 2012
FreeType 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 service (divide-by-zero error) via a crafted font.
Numeric Errors
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1142
- April 25, 2012
FreeType 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 service (invalid heap write operation and memory corruption) or possibly execute arbitrary code via crafted glyph-outline data in a font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1141
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via a crafted ASCII string in a BDF font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1140
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via a crafted PostScript font object.
Buffer Overflow
Array index error in FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1139
- April 25, 2012
Array index error in FreeType 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 service (invalid stack read operation and memory corruption) or possibly execute arbitrary code via crafted glyph data in a BDF font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1138
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via vectors involving the MIRP instruction in a TrueType font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1137
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via a crafted header in a BDF font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1135
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via vectors involving the NPUSHB and NPUSHW instructions in a TrueType font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1134
- April 25, 2012
FreeType 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 service (invalid heap write operation and memory corruption) or possibly execute arbitrary code via crafted private-dictionary data in a Type 1 font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1126
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via crafted property data in a BDF font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1127
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via crafted glyph or bitmap data in a BDF font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1128
- April 25, 2012
FreeType 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 service (NULL pointer dereference and memory corruption) or possibly execute arbitrary code via a crafted TrueType font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1129
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via a crafted SFNT string in a Type 42 font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1130
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via crafted property data in a PCF font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products, on 64-bit platforms
CVE-2012-1131
- April 25, 2012
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products, on 64-bit platforms allows remote attackers to cause a denial of service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via vectors related to the cell table of a font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1132
- April 25, 2012
FreeType 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 service (invalid heap read operation and memory corruption) or possibly execute arbitrary code via crafted dictionary data in a Type 1 font.
Buffer Overflow
FreeType before 2.4.9, as used in Mozilla Firefox Mobile before 10.0.4 and other products
CVE-2012-1133
- April 25, 2012
FreeType 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 service (invalid heap write operation and memory corruption) or possibly execute arbitrary code via crafted glyph or bitmap data in a BDF font.
Buffer Overflow
Integer overflow in base/ftstream.c in libXft (aka the X FreeType library) in FreeType before 2.4 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted Compact Font Format (CFF) font file
CVE-2010-3311
- January 07, 2011
Integer overflow in base/ftstream.c in libXft (aka the X FreeType library) in FreeType before 2.4 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted Compact Font Format (CFF) font file that triggers a heap-based buffer overflow, related to an "input stream position error" issue, a different vulnerability than CVE-2010-1797.
Numeric Errors
Buffer overflow in the ft_var_readpackedpoints function in truetype/ttgxvar.c in FreeType 2.4.3 and earlier
CVE-2010-3855
- November 26, 2010
Buffer overflow in the ft_var_readpackedpoints function in truetype/ttgxvar.c in FreeType 2.4.3 and earlier allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted TrueType GX font.
Buffer Overflow
Heap-based buffer overflow in the Ins_SHZ function in ttinterp.c in FreeType 2.4.3 and earlier
CVE-2010-3814
- November 26, 2010
Heap-based buffer overflow in the Ins_SHZ function in ttinterp.c in FreeType 2.4.3 and earlier allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted SHZ bytecode instruction, related to TrueType opcodes, as demonstrated by a PDF document with a crafted embedded font.
Buffer Overflow
FreeType before 2.4.2 uses incorrect integer data types during bounds checking, which
CVE-2010-2807
- August 19, 2010
FreeType before 2.4.2 uses incorrect integer data types during bounds checking, which allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file.
Incorrect Conversion between Numeric Types
Integer underflow in glyph handling in FreeType before 2.4.0
CVE-2010-2497
- August 19, 2010
Integer underflow in glyph handling in FreeType before 2.4.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file.
Integer underflow
The psh_glyph_find_strong_points function in pshinter/pshalgo.c in FreeType before 2.4.0 does not properly implement hinting masks, which allows remote attackers to cause a denial of service (heap memory corruption and application crash) or possibly execute arbitrary code via a crafted font file
CVE-2010-2498
- August 19, 2010
The psh_glyph_find_strong_points function in pshinter/pshalgo.c in FreeType before 2.4.0 does not properly implement hinting masks, which allows remote attackers to cause a denial of service (heap memory corruption and application crash) or possibly execute arbitrary code via a crafted font file that triggers an invalid free operation.
Memory Corruption
Buffer overflow in the Mac_Read_POST_Resource function in base/ftobjs.c in FreeType before 2.4.0
CVE-2010-2499
- August 19, 2010
Buffer overflow in the Mac_Read_POST_Resource function in base/ftobjs.c in FreeType before 2.4.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted LaserWriter PS font file with an embedded PFB fragment.
Classic Buffer Overflow
Integer overflow in the gray_render_span function in smooth/ftgrays.c in FreeType before 2.4.0
CVE-2010-2500
- August 19, 2010
Integer overflow in the gray_render_span function in smooth/ftgrays.c in FreeType before 2.4.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file.
Integer Overflow or Wraparound
Heap-based buffer overflow in the Mac_Read_POST_Resource function in base/ftobjs.c in FreeType before 2.4.0
CVE-2010-2519
- August 19, 2010
Heap-based buffer overflow in the Mac_Read_POST_Resource function in base/ftobjs.c in FreeType before 2.4.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted length value in a POST fragment header in a font file.
Memory Corruption
Heap-based buffer overflow in the Ins_IUP function in truetype/ttinterp.c in FreeType before 2.4.0, when TrueType bytecode support is enabled
CVE-2010-2520
- August 19, 2010
Heap-based buffer overflow in the Ins_IUP function in truetype/ttinterp.c in FreeType before 2.4.0, when TrueType bytecode support is enabled, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file.
Memory Corruption
Multiple buffer overflows in demo programs in FreeType before 2.4.0
CVE-2010-2527
- August 19, 2010
Multiple buffer overflows in demo programs in FreeType before 2.4.0 allow remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file.
Classic Buffer Overflow
Buffer overflow in ftmulti.c in the ftmulti demo program in FreeType before 2.4.2
CVE-2010-2541
- August 19, 2010
Buffer overflow in ftmulti.c in the ftmulti demo program in FreeType before 2.4.2 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file.
Classic Buffer Overflow
