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CVE-2021-4011

HIGHCVSS 7.8/10EPSS 0.56%

Last modified

CVE-2021-4011 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.56% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.8/10

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

EPSS Probability
0.56%

42.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
X.OrgX Server< 1.20.14
X.OrgX Server21.1.0
X.OrgX Server21.1.1
FedoraprojectFedora34
FedoraprojectFedora35
DebianDebian Linux9.0
DebianDebian Linux10.0
DebianDebian Linux11.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2021-4011?
CVE-2021-4011 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.56% probability of exploitation in the next 30 days.
How do I fix CVE-2021-4011?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-4011?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST