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CVE-2023-0494

HIGHCVSS 7.8/10EPSS 0.90%

Last modified

CVE-2023-0494 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.

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
0.90%

55.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
X.OrgX Server< 21.1.7
FedoraprojectFedora36
FedoraprojectFedora37
RedhatEnterprise Linux8.0
RedhatEnterprise Linux8.1
RedhatEnterprise Linux9.0
RedhatEnterprise Linux Aus8.4
RedhatEnterprise Linux Aus8.6
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Eus8.4
RedhatEnterprise Linux Eus8.6
RedhatEnterprise Linux Eus9.0
RedhatEnterprise Linux For Ibm Z Systems7.0
RedhatEnterprise Linux For Ibm Z Systems8.0
RedhatEnterprise Linux For Ibm Z Systems Eus8.4
RedhatEnterprise Linux For Ibm Z Systems Eus8.6
RedhatEnterprise Linux For Power Big Endian7.0
RedhatEnterprise Linux For Power Little Endian7.0
RedhatEnterprise Linux For Power Little Endian8.0
RedhatEnterprise Linux For Power Little Endian9.0
RedhatEnterprise Linux For Power Little Endian Eus8.4
RedhatEnterprise Linux For Power Little Endian Eus8.6
RedhatEnterprise Linux For Scientific Computing7.0
RedhatEnterprise Linux Server7.0
RedhatEnterprise Linux Server Aus8.2
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions8.1
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions8.2
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions8.4
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions8.6
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions9.0
RedhatEnterprise Linux Server Tus8.2
RedhatEnterprise Linux Server Tus8.4
RedhatEnterprise Linux Server Tus8.6
RedhatEnterprise Linux Server Update Services For Sap Solutions8.2
RedhatEnterprise Linux Server Workstation7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-0494?
A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.
How severe is CVE-2023-0494?
CVE-2023-0494 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.
How do I fix CVE-2023-0494?
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-2023-0494?

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

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Source: NVD / NIST