CVE-2025-40843 json
Buffer overflow in CodeChecker log command
published 2025-09-22 13 mo ago modified 2026-10-08 32 d ago also GHSA-5xf2-f6ch-6p8r , PYSEC-2025-100 , EUVD-2025-30823
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
CodeChecker is an analyzer tooling, defect database and viewer extension for the Clang Static Analyzer and Clang Tidy.
CodeChecker versions up to 6.26.1 contain a buffer overflow vulnerability in the internal ldlogger library, which is executed by the CodeChecker log command.
This issue affects CodeChecker: through 6.26.1.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 12 mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/Ericsson/codechecker/security/advisories/GHSA-5xf2-f6ch-6p8r referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 5.9 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | codechecker | <6.26.2 |
6.26.2 |
Affected products
- Ericsson CodeChecker
Classification
- Weakness
-
- CWE-121 Stack-based Buffer Overflow
References
-
github.com
/Ericsson/codechecker/commit/4122eb1b43d00c880e4f0747d2ca0a674feb7a50
web
-
github.com
/Ericsson/codechecker/security/advisories/GHSA-5xf2-f6ch-6p8r
vendor-advisory, web, exploit, evidence
-
nvd.nist.gov
/vuln/detail/CVE-2025-40843
advisory
-
github.com
/Ericsson/codechecker
package
-
github.com
/pypa/advisory-database/tree/main/vulns/codechecker/PYSEC-2025-100.yaml
web
Sources
- CVE List CVE-2025-40843
- GitHub Advisory GHSA-5xf2-f6ch-6p8r
- NVD CVE-2025-40843
- OSV PYSEC-2025-100
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.