CVE-2018-20374 json
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27.
published 2018-12-23 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-12932
- cvss
- 5.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- lists.nongnu.org https://lists.nongnu.org/archive/html/tinycc-devel/2018-12/msg00015.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 5.5 | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
lists.nongnu.org
/archive/html/tinycc-devel/2018-12/msg00015.html
exploit, mailing-list, third-party-advisory
Sources
- CVE List CVE-2018-20374
- NVD CVE-2018-20374
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.