CVE-2026-31663
HIGH
MEDIUM
Priority: 0.01
BB Relevance:
41/100
Published: 2026-04-24
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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 Software (22)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | acf568ee859f098279eadf551612f103afdacb4e < 4d06caedea587c59cc2cc893ceecc57c75c64312 |
| Linux | Linux | acf568ee859f098279eadf551612f103afdacb4e < 94439cbe478b53f92223da9aae95fffb28623c3f |
| Linux | Linux | acf568ee859f098279eadf551612f103afdacb4e < 4236c30b437b80f673b9e08c8fae38b8d471ac9e |
| Linux | Linux | acf568ee859f098279eadf551612f103afdacb4e < 0f451b43c88bf2b9c038b414be580efee42e031b |
| Linux | Linux | acf568ee859f098279eadf551612f103afdacb4e < 5002beda5cac69d522dc54da0d5d463ed9c963d2 |
| Linux | Linux | acf568ee859f098279eadf551612f103afdacb4e < 1c428b03840094410c5fb6a5db30640486bbbfcb |
| Linux | Linux | 69895c5ea0ca2e8d7de1e6d36965d0ab9730787f |
| Linux | Linux | 833760100588acfb267dac4d6a02ab9931237739 |
| Linux | Linux | e095ecaec6d94aa2156cceb98a85d409b51190f3 |
| Linux | Linux | 3.2.100 < 3.3 |
| Linux | Linux | 3.16.55 < 3.17 |
| Linux | Linux | 4.14.24 < 4.15 |
| Linux | Linux | 4.15 |
| linux | linux_kernel | 3.2.100 – 3.3 |
| linux | linux_kernel | 4.15 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |