CVE-2026-63919xfrm: input: hold netns during deferred transport reinjection
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: xfrm: input: hold netns during deferred transport reinjection Transport-mode reinjection stores a struct net pointer in skb->cb and uses it later from xfrm_trans_reinject(). That pointer must stay valid until the deferred callback runs. Take a netns reference when queueing deferred reinjection work and drop it after the callback completes. Use maybe_get_net() so the queueing path does not revive a namespace that is already being torn down. This keeps the existing workqueue design and fixes the netns lifetime handling in one place for all users of xfrm_trans_queue_net().
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 7b3801927e52f8621de311277f7fc727635019e7 before 7ee59eda8820b758ed29e1cd3222359c7b97302c; 7b3801927e52f8621de311277f7fc727635019e7 builds before 2df7059a18afb7d3aee6c36cad5d371c198111d4; from 7b3801927e52f8621de311277f7fc727635019e7 before 8dfabcba6a943a7a02ebe1e1637c361ba96acbaa; from 7b3801927e52f8621de311277f7fc727635019e7 before 48ce101cd630d6745b6923b5bad8358bc4c119da; from 7b3801927e52f8621de311277f7fc727635019e7 before 55ddfc41451f01c588089cd74957a05311b6f202; from 7b3801927e52f8621de311277f7fc727635019e7 before 9f7ebb45a83afc3216e855e57d51bb4bc9b5232e; from 7b3801927e52f8621de311277f7fc727635019e7 before 9f67a36e91bb50d358760f381f233913fe5c09f8; from 7b3801927e52f8621de311277f7fc727635019e7 before c16f74dc1d75d0e2e7670076d5375deda110ebeb | CNA record |
References
- https://git.kernel.org/stable/c/7ee59eda8820b758ed29e1cd3222359c7b97302c
- https://git.kernel.org/stable/c/2df7059a18afb7d3aee6c36cad5d371c198111d4
- https://git.kernel.org/stable/c/8dfabcba6a943a7a02ebe1e1637c361ba96acbaa
- https://git.kernel.org/stable/c/48ce101cd630d6745b6923b5bad8358bc4c119da
- https://git.kernel.org/stable/c/55ddfc41451f01c588089cd74957a05311b6f202
- https://git.kernel.org/stable/c/9f7ebb45a83afc3216e855e57d51bb4bc9b5232e
- https://git.kernel.org/stable/c/9f67a36e91bb50d358760f381f233913fe5c09f8
- https://git.kernel.org/stable/c/c16f74dc1d75d0e2e7670076d5375deda110ebeb
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.