CVE-2026-31471

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: only publish mode_data after clone setup iptfs_clone_state() stores x->mode_data before allocating the reorder window. If that allocation fails, the code frees the cloned state and returns -ENOMEM, leaving x->mode_data pointing at freed memory. The xfrm clone unwind later runs destroy_state() through x->mode_data, so the failed clone path tears down IPTFS state that clone_state() already freed. Keep the cloned IPTFS state private until all allocations succeed so failed clones leave x->mode_data unset. The destroy path already handles a NULL mode_data pointer.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://git.kernel.org/stable/c/371a43c4ac70cac0de9f9b1fc5b1660b9565b9f1 ↗
• https://git.kernel.org/stable/c/5784a1e2889c9525a8f036cb586930e232170bf7 ↗
• https://git.kernel.org/stable/c/d849a2f7309fc0616e79d13b008b0a47e0458b6e ↗