High · published May 8, 2026
In the Linux kernel, the following vulnerability has been resolved:
netfilter: x_tables: guard option walkers against 1-byte tail reads
When the last byte of options is a non-single-byte option kind, walkers
that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end
of the option area.
Add an explicit i == optlen - 1 check before dereferencing op[i + 1]
in xt_tcpudp and xt_dccp option walkers.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 2.6.16, < 5.10.253 | 5.10.253 |
| linux/linux_kernel | ≥ 5.11, < 5.15.203 | 5.15.203 |
| linux/linux_kernel | ≥ 5.16, < 6.1.167 | 6.1.167 |
| linux/linux_kernel | ≥ 6.2, < 6.6.130 | 6.6.130 |
| linux/linux_kernel | ≥ 6.7, < 6.12.78 | 6.12.78 |
| linux/linux_kernel | ≥ 6.13, < 6.18.19 | 6.18.19 |
| linux/linux_kernel | ≥ 6.19, < 6.19.9 | 6.19.9 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |