CVE-2023-34319 — Linux: buffer overrun in netback due to unusual packet
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. Unfortu…
Published: 2023-09-22 · CVSS: 7.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7