CVE-2023-34319
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedSep 22, 2023
First seenSep 22, 2023
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- linux linux_kernel4.10, 4.14.321, 4.19.290, 5.4.252, 5.10.189, 5.15.125, 6.1.44, 6.4.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.9.336 ≤ v < 4.10, 4.14.302 ≤ v < 4.14.321, 4.19.269 ≤ v < 4.19.290, 5.4.227 ≤ v < 5.4.252, 5.10.159 ≤ v < 5.10.189, 5.15.83 ≤ v < 5.15.125, 6.1.13 ≤ v < 6.1.44, 6.2 ≤ v < 6.4.9 | 4.10, 4.14.321, 4.19.290, 5.4.252, 5.10.189, 5.15.125, 6.1.44, 6.4.9 |
| xen xen | 3.2.0 ≤ v | — |
| debian debian_linux | 10.0 | — |
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