IT

Tracker / CVE-2026-31663

CVE-2026-31663

High 7.8

In the Linux kernel, the following vulnerability has been resolved: xfrm: hold dev ref until after transport_finish NF_HOOK After async crypto completes, xfrm_input_resume() calls dev_put() immediately on re-entry before the skb reaches transport_finish. The skb->dev pointer is then used inside NF_HOOK and its okfn, which can race with device teardown. Remove the dev_put from the async resumption entry and instead drop the reference after the NF_HOOK call in transport_finish, using a saved device pointer since NF_HOOK may consume the skb. This covers NF_DROP, NF_QUEUE and NF_STOLEN paths that skip the okfn. For non-transport exits (decaps, gro, drop) and secondary async return points, release the reference inline when async is set.

Affected products and versions

linux linux_kernel
linux linux_kernel · 3.16.55 → 3.17
linux linux_kernel · 3.2.100 → 3.3
linux linux_kernel · 4.14.24 → 4.15
linux linux_kernel · 4.15.1 → 6.18.23
linux linux_kernel · 6.19 → 6.19.13

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References