CVE-2018-20374
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source...
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the use_section1 function in tccasm.c.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the use_section1 function in tccasm.c.
- Record
CVE-2018-20374- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the use_section1 function in tccasm.c.
- Record
CVE-2018-20374- Updated
- 2026-11-02
EUVDEUVD-2018-12932 No score
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the use_section1 function in tccasm.c.
- Record
EUVD-2018-12932- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c6x3-v6cq-j2qh
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source...
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the use_section1 function in tccasm.c.
- Record
GHSA-c6x3-v6cq-j2qh- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the use_section1 function in tccasm.c.
- Record
CVE-2018-20374- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2018-20374
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the use_section1 function in tccasm.c.
- Record
DEBIAN-CVE-2018-20374- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-20374
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to an 8 byte out of bounds write in the use_section1 function in tccasm.c.
- Record
UBUNTU-CVE-2018-20374- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
tccDebian:12 |
All versions, plus listed versions 0.9.27+git20200814.62c30a4a-10.9.27+git20200814.62c30a4a-2 |
None known |
tccDebian:13 |
All versions, plus listed versions 0.9.27+git20200814.62c30a4a-2 |
None known |
tccUbuntu:16.04:LTS |
All versions, plus listed versions 0.9.27~git20140923.9d7fb33-3ubuntu10.9.27~git20151227.933c223-1 |
None known |
tccUbuntu:18.04:LTS |
All versions, plus listed versions 0.9.27~git20161217.cd9514ab-3ubuntu10.9.27-20.9.27-40.9.27-5 |
None known |
tccUbuntu:20.04:LTS |
All versions, plus listed versions 0.9.27-8 |
None known |
tccUbuntu:22.04:LTS |
All versions, plus listed versions 0.9.27+git20200814.62c30a4a-1 |
None known |
tccUbuntu:24.04:LTS |
All versions, plus listed versions 0.9.27+git20200814.62c30a4a-1 |
None known |
tccUbuntu:25.10 |
All versions, plus listed versions 0.9.27+git20200814.62c30a4a-2 |
None known |
tccUbuntu:26.10 |
All versions, plus listed versions 0.9.27+git20200814.62c30a4a-2build1 |
None known |
tccUbuntu:26.04:LTS |
All versions, plus listed versions 0.9.27+git20200814.62c30a4a-20.9.27+git20200814.62c30a4a-2build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-20374 is a medium vulnerability (CVSS 5.5) in Tinycc, published December 23, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.75%, the 54th percentile. No source names a fixed version.