CVE-2026-31663
Published: Apr 24, 2026
Modified: May 23, 2026
CVSS v3.1
7.8
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.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected acf568ee859f098279eadf551612f103afdacb4e - < 0f451b43c88bf2b9c038b414be580efee42e031baffected acf568ee859f098279eadf551612f103afdacb4e - < 5002beda5cac69d522dc54da0d5d463ed9c963d2affected acf568ee859f098279eadf551612f103afdacb4e - < 1c428b03840094410c5fb6a5db30640486bbbfcbaffected 69895c5ea0ca2e8d7de1e6d36965d0ab9730787faffected 833760100588acfb267dac4d6a02ab9931237739+4 more versions |
Linux | Linux | affected 4.15unaffected 0 - < 4.15unaffected 6.18.23 - <= 6.18.*unaffected 6.19.13 - <= 6.19.*unaffected 7.0 - <= * |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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