CVE-2026-72463
CRITICAL
INFO
Priority: 0.04
BB Relevance:
80/100
Published: 2026-08-15
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix dev use-after-free in xfrm async resumption xfrm async resumption hold skb->dev refcnt until after transport_finish. However, xfrm_rcv_cb may modify skb->dev to tunnel dev without taking device reference, such as vti_rcv_cb. The subsequent async resumption will decrement the tunnel device's reference count, which lead to uaf of tunnel dev and refcnt leak of orig dev as below: unregister_netdevice: waiting for vti1 to become free. Usage count = -2 Stash the original skb->dev to fix refcnt imbalance. The new skb->dev set by xfrm_rcv_cb can race with device teardown. Extend rcu protection over xfrm_rcv_cb and transport_finish to prevent races.
Affected Software (13)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 4236c30b437b80f673b9e08c8fae38b8d471ac9e < fed4d3195a31125566876952ce66113ec1eb9008 |
| Linux | Linux | 0f451b43c88bf2b9c038b414be580efee42e031b < 1acd93259b6be269e26be5d71c224bccd1f8352f |
| Linux | Linux | 1c428b03840094410c5fb6a5db30640486bbbfcb < 63a30015199912bd5055bead8001b1ae68a67cdb |
| Linux | Linux | 1c428b03840094410c5fb6a5db30640486bbbfcb < 8045c0df98d4f14c54e5cb875f1c9c0ce89fe4ff |
| Linux | Linux | 4d06caedea587c59cc2cc893ceecc57c75c64312 |
| Linux | Linux | 94439cbe478b53f92223da9aae95fffb28623c3f |
| Linux | Linux | 5002beda5cac69d522dc54da0d5d463ed9c963d2 |
| Linux | Linux | 6.12.94 < 6.12.112 |
| Linux | Linux | 6.18.23 < 6.18.54 |
| Linux | Linux | 6.1.191 < 6.2 |
| Linux | Linux | 6.6.160 < 6.7 |
| Linux | Linux | 6.19.13 < 6.20 |
| Linux | Linux | 7.0 |