CVE-2026-63919
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
19/07/2026
Last modified:
27/07/2026
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
xfrm: input: hold netns during deferred transport reinjection<br />
<br />
Transport-mode reinjection stores a struct net pointer in skb->cb and<br />
uses it later from xfrm_trans_reinject(). That pointer must stay valid<br />
until the deferred callback runs.<br />
<br />
Take a netns reference when queueing deferred reinjection work and drop<br />
it after the callback completes. Use maybe_get_net() so the queueing<br />
path does not revive a namespace that is already being torn down.<br />
<br />
This keeps the existing workqueue design and fixes the netns lifetime<br />
handling in one place for all users of xfrm_trans_queue_net().
Impact
Base Score 3.x
8.80
Severity 3.x
HIGH
References to Advisories, Solutions, and Tools
- https://git.kernel.org/stable/c/2df7059a18afb7d3aee6c36cad5d371c198111d4
- https://git.kernel.org/stable/c/48ce101cd630d6745b6923b5bad8358bc4c119da
- https://git.kernel.org/stable/c/55ddfc41451f01c588089cd74957a05311b6f202
- https://git.kernel.org/stable/c/7ee59eda8820b758ed29e1cd3222359c7b97302c
- https://git.kernel.org/stable/c/8dfabcba6a943a7a02ebe1e1637c361ba96acbaa
- https://git.kernel.org/stable/c/9f67a36e91bb50d358760f381f233913fe5c09f8
- https://git.kernel.org/stable/c/9f7ebb45a83afc3216e855e57d51bb4bc9b5232e
- https://git.kernel.org/stable/c/c16f74dc1d75d0e2e7670076d5375deda110ebeb