Medium · published April 22, 2026
In the Linux kernel, the following vulnerability has been resolved:
esp: fix skb leak with espintcp and async crypto
When the TX queue for espintcp is full, esp_output_tail_tcp will
return an error and not free the skb, because with synchronous crypto,
the common xfrm output code will drop the packet for us.
With async crypto (esp_output_done), we need to drop the skb when
esp_output_tail_tcp returns an error.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 5.6, < 5.10.253 | 5.10.253 |
| linux/linux_kernel | ≥ 5.11, < 5.15.203 | 5.15.203 |
| linux/linux_kernel | ≥ 5.16, < 6.1.168 | 6.1.168 |
| linux/linux_kernel | ≥ 6.2, < 6.6.131 | 6.6.131 |
| linux/linux_kernel | ≥ 6.7, < 6.12.80 | 6.12.80 |
| linux/linux_kernel | ≥ 6.13, < 6.18.21 | 6.18.21 |
| linux/linux_kernel | ≥ 6.19, < 6.19.11 | 6.19.11 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |