CVE-2026-63919 (GCVE-0-2026-63919)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-20 13:41
VLAI
Title
xfrm: input: hold netns during deferred transport reinjection
Summary
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
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7b3801927e52f8621de311277f7fc727635019e7 , < 7ee59eda8820b758ed29e1cd3222359c7b97302c (git)
Affected: 7b3801927e52f8621de311277f7fc727635019e7 , < 2df7059a18afb7d3aee6c36cad5d371c198111d4 (git)
Affected: 7b3801927e52f8621de311277f7fc727635019e7 , < 8dfabcba6a943a7a02ebe1e1637c361ba96acbaa (git)
Affected: 7b3801927e52f8621de311277f7fc727635019e7 , < 48ce101cd630d6745b6923b5bad8358bc4c119da (git)
Affected: 7b3801927e52f8621de311277f7fc727635019e7 , < 55ddfc41451f01c588089cd74957a05311b6f202 (git)
Affected: 7b3801927e52f8621de311277f7fc727635019e7 , < 9f7ebb45a83afc3216e855e57d51bb4bc9b5232e (git)
Affected: 7b3801927e52f8621de311277f7fc727635019e7 , < 9f67a36e91bb50d358760f381f233913fe5c09f8 (git)
Affected: 7b3801927e52f8621de311277f7fc727635019e7 , < c16f74dc1d75d0e2e7670076d5375deda110ebeb (git)
Create a notification for this product.
Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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    "datePublished": "2026-07-19T14:55:22.121Z",
    "dateReserved": "2026-07-19T07:54:57.020Z",
    "dateUpdated": "2026-07-20T13:41:29.060Z",
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.