Critical · published December 18, 2025
⚠️ A tiny oversight in RIOT OS could lead to big trouble! When handling IPv6 fragments, the reassembly buffer skips a crucial size check. 🤦♂️ Think of it as trying to fit ten pounds of flour into a five-pound bag—when you don’t check the size first, you end up with a messy overflow that spills into other ingredients and causes chaos in the kitchen! If exploited, this vulnerability could enable an attacker to corrupt other packet buffers, potentially leading to wild memory corruption and even remote code execution. While this risk is low, it's still a sneaky threat lurking in the shadows, just waiting for the right moment!
Think of it as trying to fit ten pounds of flour into a five-pound bag—when you don’t check the size first, you end up with a messy overflow that spills into other ingredients and causes chaos in the kitchen! This vulnerability in RIOT OS v2025.07 arises from the lack of a size check during the IPv6 fragmentation reassembly process, allowing buffer overflow and potential state corruption of other memory segments.
If exploited, this vulnerability could enable an attacker to corrupt other packet buffers, potentially leading to wild memory corruption and even remote code execution. While this risk is low, it's still a sneaky threat lurking in the shadows, just waiting for the right moment! To mitigate this issue, upgrade to RIOT OS version 2025.10, which remedies the vulnerability. Additionally, review your configuration for the `gnrc_ipv6_ext_frag` module to ensure it's appropriately managed—better safe than sorry! You've got this! Follow these steps, and you'll be back to solid security in no time. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| riot-os/riot | < 2025.10 | 2025.10 |
| riot-os/riot | all versions | — |
| riot-os/riot | all versions | — |
| riot-os/riot | all versions | — |