CVE-2023-34319 (GCVE-0-2023-34319)

Vulnerability from cvelistv5 – Published: 2023-09-22 13:34 – Updated: 2025-11-04 19:16
VLAI?
Title
Linux: buffer overrun in netback due to unusual packet
Summary
The fix for XSA-423 added logic to Linux'es netback driver to deal with a frontend splitting a packet in a way such that not all of the headers would come in one piece. Unfortunately the logic introduced there didn't account for the extreme case of the entire packet being split into as many pieces as permitted by the protocol, yet still being smaller than the area that's specially dealt with to keep all (possible) headers together. Such an unusual packet would therefore trigger a buffer overrun in the driver.
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
XEN
References
Impacted products
Vendor Product Version
Linux Linux Unknown: consult Xen advisory XSA-432
Create a notification for this product.
Credits
This issue was discovered by Ross Lagerwall of Citrix.
Show details on NVD website
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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