CVE-2026-31663

Vulnerability overview

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 th...

Affected product and versions

Product

Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6

Affected versions

>= acf568ee859f098279eadf551612f103afdacb4e < 4236c30b437b80f673b9e08c8fae38b8d471ac9e, >= acf568ee859f098279eadf551612f103afdacb4e < 0f451b43c88bf2b9c038b414be580efee42e031b, >= acf568ee859f098279eadf551612f103afdacb4e < 5002beda5cac69d522dc54da0d5d463ed9c963d2, >= acf568ee859f098279eadf551612f103afdacb4e < 1c428b03840094410c5fb6a5db30640486bbbfcb, >= 69895c5ea0ca2e8d7de1e6d36965d0ab9730787f, >= 833760100588acfb267dac4d6a02ab9931237739, >= e095ecaec6d94aa2156cceb98a85d409b51190f3, >= 3.2.100 < 3.3, >= 3.16.55 < 3.17, >= 4.14.24 < 4.15, >= 4.15, >= 4.15.1 < 6.18.23, >= 6.19 < 6.19.13, 4.15, 7.0

Fixed versions

3.3, 3.17, 4.15, 6.18.23, 6.19.13

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-826