How severe is CVE-2025-40843?

CVE-2025-40843 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-40843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40843?

CVE-2025-40843 affects Ericsson Codechecker. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-40843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-40843 have an EU (EUVD) identifier?

Yes. CVE-2025-40843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30823.

When was CVE-2025-40843 published?

CVE-2025-40843 was published on 2025-10-28 and last updated on 2026-06-17.

CVE-2025-40843

CVE-2025-40843 is a medium-severity vulnerability in Ericsson Codechecker with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-30823
Weakness: CWE-121
Affected product: Ericsson Codechecker
Published: 2025-10-28
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-40843?: 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.
How severe is CVE-2025-40843?: CVE-2025-40843 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-40843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40843?: CVE-2025-40843 affects Ericsson Codechecker. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-40843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-40843 have an EU (EUVD) identifier?: Yes. CVE-2025-40843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-30823.
When was CVE-2025-40843 published?: CVE-2025-40843 was published on 2025-10-28 and last updated on 2026-06-17.

References

https://github.com/Ericsson/codechecker/security/advisories/GHSA-5xf2-f6ch-6p8r

Affected products (1)

cpe:2.3:a:ericsson:codechecker:*:*:*:*:*:*:*:*

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