xfrm: input: hold netns during deferred transport reinjection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63919
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:10 UTC
Updated2026-07-20 15:16:56 UTC
DescriptionIn 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().

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.002260000 probability, percentile 0.134280000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7b3801927e52f8621de311277f7fc727635019e7 7ee59eda8820b758ed29e1cd3222359c7b97302c git Not specified
CNA Linux Linux affected 7b3801927e52f8621de311277f7fc727635019e7 2df7059a18afb7d3aee6c36cad5d371c198111d4 git Not specified
CNA Linux Linux affected 7b3801927e52f8621de311277f7fc727635019e7 8dfabcba6a943a7a02ebe1e1637c361ba96acbaa git Not specified
CNA Linux Linux affected 7b3801927e52f8621de311277f7fc727635019e7 48ce101cd630d6745b6923b5bad8358bc4c119da git Not specified
CNA Linux Linux affected 7b3801927e52f8621de311277f7fc727635019e7 55ddfc41451f01c588089cd74957a05311b6f202 git Not specified
CNA Linux Linux affected 7b3801927e52f8621de311277f7fc727635019e7 9f7ebb45a83afc3216e855e57d51bb4bc9b5232e git Not specified
CNA Linux Linux affected 7b3801927e52f8621de311277f7fc727635019e7 9f67a36e91bb50d358760f381f233913fe5c09f8 git Not specified
CNA Linux Linux affected 7b3801927e52f8621de311277f7fc727635019e7 c16f74dc1d75d0e2e7670076d5375deda110ebeb git Not specified
CNA Linux Linux affected 5.6 Not specified
CNA Linux Linux unaffected 5.6 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8dfabcba6a943a7a02ebe1e1637c361ba96acbaa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2df7059a18afb7d3aee6c36cad5d371c198111d4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9f7ebb45a83afc3216e855e57d51bb4bc9b5232e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/55ddfc41451f01c588089cd74957a05311b6f202 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7ee59eda8820b758ed29e1cd3222359c7b97302c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9f67a36e91bb50d358760f381f233913fe5c09f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c16f74dc1d75d0e2e7670076d5375deda110ebeb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/48ce101cd630d6745b6923b5bad8358bc4c119da 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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