What’s Vulnerable › Vulnerabilities

CVE-2019-12495

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-05-31 · updated 2026-06-17
• Weakness: CWE-787

Description

An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to a one-byte out-of-bounds write in the gsym_addr function in x86_64-gen.c. This occurs because tccasm.c mishandles section switches.

Affected products

• Tinycc: 0.9.27

References

• http://www.securityfocus.com/bid/108541
• https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.html
• https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5
• http://www.securityfocus.com/bid/108541
• https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.html
• https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5

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