CVE-2026-111732
Critical
Description
P-Net before 1.0.3, when built with PNET_OPTION_AR_VENDOR_BLOCKS enabled, parses a data length from a field of the ARVendorBlock request that is not part of the block definition and uses it as the number of bytes to copy into a fixed-size buffer, without comparing it with the buffer size or the block length. A crafted Connect request causes an out-of-bounds write. This can lead to a crash (denial of service) or potentially arbitrary code execution. This option is disabled by default.
SeverityCritical
CVSS9.3
Exploit probability—
ProductP-Net
PublishedOct 29, 2026
First seenNov 4, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- RT-Labs P-Net1.0.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| RT-Labs P-Net | v < 1.0.3 | 1.0.3 |
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