CVEvulnerability

CVE-2026-31663

7.8 HIGH Published 2026-04-24 Modified 2026-10-21 Official page ↗
Status
Modified
Published
2026-04-24
Last modified
2026-10-21
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416, CWE-826

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.

Affected configurations

• linux linux kernel (>= 3.2.100 < 3.3) • linux linux kernel (>= 3.16.55 < 3.17) • 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) • linux linux kernel 4.15 • linux linux kernel 7.0

Related

Weakness · CWE (2)

  • CWE-416 Use After Free weakness
  • CWE-826 Premature Release of Resource During Expected Lifetime weakness

References