CVE-2026-72463
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 versions
Linux kernel versions
6.12.94,
6.18.23,
6.19.13,
7.0
and later are affected. Fixed in
7.1.5,
7.2-rc1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-72463?
CVE-2026-72463 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.12.94 onward and has been patched in 7.1.5 and 7.2-rc1. CVE-2026-72463 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-72463?
Yes. CVE-2026-72463 has been patched. Fixed versions include 7.1.5 and 7.2-rc1. If you are running Linux kernel 6.12.94 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-72463 actively exploited?
No. CVE-2026-72463 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.