CVE-2026-35547

HIGH
Published Apr 30, 2026 Modified May 1, 2026 CWE-122 CWE-130

Description

When processing the header of an incoming message, libnv failed to properly validate the message size. The lack of validation allows a malicious program to write outside the bounds of a heap allocation. This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges.

CVSS v3.1 Score

8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0003
Probability of exploitation
0.09%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-122 CWE-122
CWE-130 CWE-130

Affected Products

Vendor Product
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd
freebsd freebsd

References

Frequently Asked Questions

What is CVE-2026-35547? +
When processing the header of an incoming message, libnv failed to properly validate the message size. The lack of validation allows a malicious program to write outside the bounds of a heap allocation. This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges. It has a CVSS v3.1 base score of 8.1 (HIGH).
How severe is CVE-2026-35547? +
CVE-2026-35547 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0003, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-35547? +
CVE-2026-35547 affects products from freebsd, specifically: freebsd. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-35547? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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