CVE-2026-63919
Last modified
CVE-2026-63919 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.63% chance of exploitation in the next 30 days.
Description
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().
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 7b3801927e52f8621de311277f7fc727635019e7, < 7ee59eda8820b758ed29e1cd3222359c7b97302c; >= 7b3801927e52f8621de311277f7fc727635019e7, < 2df7059a18afb7d3aee6c36cad5d371c198111d4; >= 7b3801927e52f8621de311277f7fc727635019e7, < 8dfabcba6a943a7a02ebe1e1637c361ba96acbaa; >= 7b3801927e52f8621de311277f7fc727635019e7, < 48ce101cd630d6745b6923b5bad8358bc4c119da; >= 7b3801927e52f8621de311277f7fc727635019e7, < 55ddfc41451f01c588089cd74957a05311b6f202; >= 7b3801927e52f8621de311277f7fc727635019e7, < 9f7ebb45a83afc3216e855e57d51bb4bc9b5232e; >= 7b3801927e52f8621de311277f7fc727635019e7, < 9f67a36e91bb50d358760f381f233913fe5c09f8; >= 7b3801927e52f8621de311277f7fc727635019e7, < c16f74dc1d75d0e2e7670076d5375deda110ebeb |
| Linux | Linux | 5.6 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-63919?
How severe is CVE-2026-63919?
How do I fix CVE-2026-63919?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-63913In the Linux kernel, the following vulnerability has been re…8.2
- CVE-2026-63914In the Linux kernel, the following vulnerability has been re…7.3
- CVE-2026-63915In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-63916In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-63917In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-63918In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-6392Tanium addressed an information disclosure vulnerability in …2.7
- CVE-2026-63920In the Linux kernel, the following vulnerability has been re…7.1
- CVE-2026-63921In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-63922In the Linux kernel, the following vulnerability has been re…9.8
- CVE-2026-63923In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-63924In the Linux kernel, the following vulnerability has been re…9.8
Are you affected by CVE-2026-63919?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST