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CVE-2026-63919

Full vulnerability record from the local CVENow database.

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().

Severity
HIGH
CVSS score
8.8 (v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-07-19 16:17:10.030000
Last modified
2026-10-27 12:51:04.317000
View original CVE JSON 
{
  "id": "CVE-2026-63919",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-07-19T16:17:10.030",
  "lastModified": "2026-10-27T12:51:04.317",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: input: hold netns during deferred transport reinjection\n\nTransport-mode reinjection stores a struct net pointer in skb->cb and\nuses it later from xfrm_trans_reinject(). That pointer must stay valid\nuntil the deferred callback runs.\n\nTake a netns reference when queueing deferred reinjection work and drop\nit after the callback completes. Use maybe_get_net() so the queueing\npath does not revive a namespace that is already being torn down.\n\nThis keeps the existing workqueue design and fixes the netns lifetime\nhandling in one place for all users of xfrm_trans_queue_net()."
    }
  ],
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          "userInteraction": "NONE",
          "scope": "UNCHANGED",
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