What is CVE-2023-4255?

CVE-2023-4255 is a medium-severity vulnerability in Fedora Extra Packages For Enterprise Linux, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-12-21.

How severe is CVE-2023-4255?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2023-4255 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Fedora Extra Packages For Enterprise Linux

CVE-2023-4255

An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Explo…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (6.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Fedora Extra Packages For Enterprise Linux
Fedora
N/a W3m

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2023-4255?: CVE-2023-4255 is a medium-severity vulnerability in Fedora Extra Packages For Enterprise Linux, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2023-12-21.
How severe is CVE-2023-4255?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2023-4255 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.