What is CVE-2026-4012?

CVE-2026-4012 is a low-severity vulnerability in Rxi Fe, classified under Out-of-bounds Read. CVSS score: 3.3/10. Published 2026-03-12.

How severe is CVE-2026-4012?

Low severity. CVSS v3 base score is 3.3 out of 10.

Out-of-bounds Read in Rxi Fe

CVE-2026-4012

A vulnerability was determined in rxi fe up to ed4cda96bd582cbb08520964ba627efb40f3dd91. The impacted element is the function read_ of the file src/fe.c. This manipulation with the input 1 causes out-of-bounds read. The attack requires loc…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (4.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R.

Affected products

Rxi Fe — versions ed4cda96bd582cbb08520964ba627efb40f3dd91

Weakness classification (CWE)

References

VDB-350534 | rxi fe fe.c read_ out-of-bounds (vdb-entry, technical-description)
VDB-350534 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
Submit #769774 | rxi fe master-branch Out-of-Bounds Read (third-party-advisory)
github.com/rxi/fe/issues/34 (issue-tracking)
github.com/oneafter/0211/blob/main/fe/repro (exploit)
github.com/rxi/fe/ (product)

Frequently asked questions

What is CVE-2026-4012?: CVE-2026-4012 is a low-severity vulnerability in Rxi Fe, classified under Out-of-bounds Read. CVSS score: 3.3/10. Published 2026-03-12.
How severe is CVE-2026-4012?: Low severity. CVSS v3 base score is 3.3 out of 10.