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CVE-2026-31663

HIGH · CVSS 7.8 EPSS 0.01%

Source: NVD + CISA KEV + EPSS · Published: 2026-04-24 · Last synced: 2026-05-24

CyberRota Analysis

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CVE
CVE-2026-31663
Severity
HIGH
CVSS
7.8
EPSS
0.01%
Linux

Original NVD Description

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.