Buffer overflow in X.org Libx11
CVE-2023-3138
A vulnerability was found in libX11. The security flaw occurs because the functions in src/InitExt.c in libX11 do not check that the values provided for the Request, Event, or Error IDs are within the bounds of the arrays that those functi…
Vulnerability class: Buffer Overflow
EPSS: 0.017 (74.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- X.org Libx11
- Redhat Enterprise_linux — versions 8.0, 9.0
- N/a Libx11 — versions libX11 1.8.6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Third Party Advisory)
- secalert@redhat.com (Patch)
- secalert@redhat.com (Patch, Mailing List)
- secalert@redhat.com (Patch, Mailing List)
- secalert@redhat.com
Frequently asked questions
- What is CVE-2023-3138?
- CVE-2023-3138 is a high-severity vulnerability in X.org Libx11, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2023-06-28.
- How severe is CVE-2023-3138?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-3138 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.