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CVE-2023-46838

HIGHCVSS 7.5/10EPSS 1.18%

Last modified

CVE-2023-46838 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Transmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

Transmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. carry no data at all. Besides a certain initial portion of the to be transferred data, these parts are directly translated into what Linux calls SKB fragments. Such converted request parts can, when for a particular SKB they are all of length zero, lead to a de-reference of NULL in core networking code.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
1.18%

63.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel>= 4.14, < 4.19.306
LinuxLinux Kernel>= 4.20, < 5.4.268
LinuxLinux Kernel>= 5.5, < 5.10.209
LinuxLinux Kernel>= 5.11, < 5.15.148
LinuxLinux Kernel>= 5.16, < 6.1.75
LinuxLinux Kernel>= 6.2, < 6.6.14
LinuxLinux Kernel>= 6.7, < 6.7.2
FedoraprojectFedora38
FedoraprojectFedora39
DebianDebian Linux10.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-46838?
Transmit requests in Xen's virtual network protocol can consist of multiple parts. While not really useful, except for the initial part any of them may be of zero length, i.e. carry no data at all. Besides a certain initial portion of the to be transferred data, these parts are directly translated into what Linux calls SKB fragments. Such converted request parts can, when for a particular SKB they are all of length zero, lead to a de-reference of NULL in core networking code.
How severe is CVE-2023-46838?
CVE-2023-46838 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.
How do I fix CVE-2023-46838?
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.

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Source: NVD / NIST