How severe is CVE-2016-6831?

CVE-2016-6831 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-6831 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6831?

CVE-2016-6831 affects Call-cc Chicken. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-6831?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-6831 published?

CVE-2016-6831 was published on 2017-01-10 and last updated on 2026-06-17.

CVE-2016-6831

CVE-2016-6831 is a high-severity vulnerability in Call-cc Chicken with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Call-cc Chicken
Published: 2017-01-10
Last modified: 2026-06-17

Description

The "process-execute" and "process-spawn" procedures did not free memory correctly when the execve() call failed, resulting in a memory leak. This could be abused by an attacker to cause resource exhaustion or a denial of service. This affects all releases of CHICKEN up to and including 4.11 (it will be fixed in 4.12 and 5.0, which are not yet released).

Frequently asked questions

What is CVE-2016-6831?: The "process-execute" and "process-spawn" procedures did not free memory correctly when the execve() call failed, resulting in a memory leak. This could be abused by an attacker to cause resource exhaustion or a denial of service. This affects all releases of CHICKEN up to and including 4.11 (it will be fixed in 4.12 and 5.0, which are not yet released).
How severe is CVE-2016-6831?: CVE-2016-6831 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-6831 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6831?: CVE-2016-6831 affects Call-cc Chicken. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-6831?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-6831 published?: CVE-2016-6831 was published on 2017-01-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:call-cc:chicken:*:*:*:*:*:*:*:*

More vulnerabilities in Call-cc Chicken

CVE-2022-45145 — Critical (CVSS 9.8): egg-compile.scm in CHICKEN 5.x before 5.3.1 allows arbitrary OS command execution during package installation via…
CVE-2014-6310 — Critical (CVSS 9.8): Buffer overflow in CHICKEN 4.9.0 and 4.9.0.1 may allow remote attackers to execute arbitrary code via the 'select'…
CVE-2012-6125 — Critical (CVSS 9.8): Chicken before 4.8.0 is susceptible to algorithmic complexity attacks related to hash table collisions.
CVE-2016-6830 — Critical (CVSS 9.8): The "process-execute" and "process-spawn" procedures in CHICKEN Scheme used fixed-size buffers for holding the…
CVE-2013-2075 — High (CVSS 8.8): Multiple buffer overflows in the (1) R5RS char-ready, (2) tcp-accept-ready, and (3) file-select procedures in Chicken…
CVE-2013-2024 — High (CVSS 8.8): OS command injection vulnerability in the "qs" procedure from the "utils" module in Chicken before 4.9.0.

All CVEs affecting Call-cc Chicken →

Other CWE-400 (Uncontrolled Resource Consumption) vulnerabilities

CVE-2026-46775 — Critical (CVSS 9.9): Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0.…
CVE-2025-61303 — Critical (CVSS 9.8): Hatching Triage Sandbox Windows 10 build 2004 (2025-08-14) and Windows 10 LTSC 2021(2025-08-14) contains a…
CVE-2025-43193 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.6, macOS Sonoma 14.7.7,…
CVE-2025-24269 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4. An app may be able to…
CVE-2025-24264 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4,…
CVE-2025-24260 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4, macOS Sonoma 14.7.5,…

Browse all CWE-400 (Uncontrolled Resource Consumption) vulnerabilities →