Is CVE-2025-11931 in the CISA KEV catalog?

No. CVE-2025-11931 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-11931?

CVE-2025-11931 has a CVSS v3 base score of 8.2 (Low).

What is the EPSS score for CVE-2025-11931?

CVE-2025-11931 has an EPSS score of 0.30% (21th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-11931?

Upgrade wolfssl on debian unstable to 5.8.4-1 or later.

CVE & CISA-KEV Catalog

CVE-2025-11931

LOW

8.2

CVSS v3

NVD

Description

Integer Underflow Leads to Out-of-Bounds Access in XChaCha20-Poly1305 Decrypt. This issue is hit specifically with a call to the function wc_XChaCha20Poly1305_Decrypt() which is not used with TLS connections, only from direct calls from an application.

CWE-191

How to fix

Remediation Available

wolfsslDebian

Fixed in:5.8.4-1CVE-2025-11931

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Exploit Intelligence

0.30%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Patch1

github.com

Related Vulnerabilities

Other CWE-191 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0497	Critical	9.8	100%	KEV	Fix
CVE-2020-36221	High	7.5	84%	-	Fix
CVE-2020-36228	High	7.5	83%	-	Fix
CVE-2023-31102	High	7.8	71%	-	Fix
CVE-2024-38063	Critical	9.8	71%	-	Fix
CVE-2017-14496	High	7.5	66%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-04.