Buffer overflow in X.org X Server
CVE-2021-4011
A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SwapCreateRegister function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Vulnerability class: Buffer Overflow
EPSS: 0.006 (43.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- X.org X_server — versions 21.1.0, 21.1.1
- Debian Debian_linux — versions 9.0, 10.0, 11.0
- Fedoraproject Fedora — versions 34, 35
- N/a Xorg-x11-server — versions xorg-x11-server 21.1.2, xorg-x11-server 1.20.14
Weakness classification (CWE)
References
- secalert@redhat.com (Vendor Advisory)
- secalert@redhat.com (Vendor Advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory)
- secalert@redhat.com (vendor-advisory, Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (vendor-advisory)
- secalert@redhat.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-4011?
- CVE-2021-4011 is a high-severity vulnerability in X.org X Server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2021-12-17.
- How severe is CVE-2021-4011?
- High severity. CVSS v3 base score is 7.8 out of 10.