MEDIUM
An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27
Published May 31, 2019
5.5
MEDIUMCVSS 3.0
EPSS 1.22%
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
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
5.5 MEDIUM NVD
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.22% 0.01218
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.01218
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.22% (0.01218) | 67.59th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.22% (0.01218) | 67.28th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.15% (0.00152) | 51.92th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.15% (0.00152) | 51.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.15% (0.00152) | 49.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.51% (0.01512) | 50.79th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v1 |
| Jan 6, 2022 | 3.63% (0.03630) | 71.48th | v1 |
| Jan 5, 2022 | 0.83% (0.00833) | 58.90th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
Weaknesses (1)
References (3)
- http://www.securityfocus.com/bid/108541 vdb-entryx_refsource_BID
- https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.html x_refsource_MISCExploitThird Party Advisory
- https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5 x_refsource_MISCPatchThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/108541 | vdb-entryx_refsource_BID | |
| https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.html | x_refsource_MISCExploitThird Party Advisory | |
| https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5 | x_refsource_MISCPatchThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published May 31, 2019
Updated Aug 4, 2024
Reserved May 31, 2019
Link CVE-2019-12495
CISA Vulnrichment
Updated n/a