CVE-2026-63919

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-19. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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 v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

July 19, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Jul 20, 2026
No patch confirmed yet.
generic

xfrm: input: hold netns during deferred transport reinjection - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c16f74dc1d75d0e2e7670076d5375deda110ebeb
generic

xfrm: input: hold netns during deferred transport reinjection - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9f7ebb45a83afc3216e855e57d51bb4bc9b5232e
generic

xfrm: input: hold netns during deferred transport reinjection - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9f67a36e91bb50d358760f381f233913fe5c09f8
generic

xfrm: input: hold netns during deferred transport reinjection - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8dfabcba6a943a7a02ebe1e1637c361ba96acbaa
generic

xfrm: input: hold netns during deferred transport reinjection - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7ee59eda8820b758ed29e1cd3222359c7b97302c
generic

xfrm: input: hold netns during deferred transport reinjection - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/55ddfc41451f01c588089cd74957a05311b6f202
generic

xfrm: input: hold netns during deferred transport reinjection - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/48ce101cd630d6745b6923b5bad8358bc4c119da
generic

xfrm: input: hold netns during deferred transport reinjection - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2df7059a18afb7d3aee6c36cad5d371c198111d4

Vendor Advisories for CVE-2026-63919(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (138 versions)7.0.12-1—

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 29× in last 7d / 163× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 214 total refreshes for this CVE.

  1. 2026-08-30 02:57 UTCEG score recompute
  2. 2026-08-30 02:57 UTCVendor advisory
  3. 2026-08-30 02:57 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-27 23:49 UTCEG score recompute
  7. 2026-08-27 23:49 UTCVendor advisory
  8. 2026-08-27 23:49 UTCGHSA enrichment
  9. 2026-08-27 14:25 UTCEPSS rescore
  10. 2026-08-27 11:54 UTCVendor advisory
  11. 2026-08-27 11:54 UTCGHSA enrichment
  12. 2026-08-26 22:26 UTCEG score recompute
  13. 2026-08-26 22:26 UTCVendor advisory
  14. 2026-08-26 22:26 UTCGHSA enrichment
  15. 2026-08-26 14:46 UTCEPSS rescore
  16. 2026-08-26 07:25 UTCVendor advisory
  17. 2026-08-26 07:25 UTCGHSA enrichment
  18. 2026-08-25 18:49 UTCEG score recompute
  19. 2026-08-25 18:49 UTCGHSA enrichment
  20. 2026-08-25 13:49 UTCEPSS rescore
  21. 2026-08-25 06:45 UTCVendor advisory
  22. 2026-08-25 06:45 UTCGHSA enrichment
  23. 2026-08-24 19:10 UTCEG score recompute
  24. 2026-08-24 19:10 UTCVendor advisory
  25. 2026-08-24 19:10 UTCGHSA enrichment
Show 75 more
  1. 2026-08-24 06:51 UTCVendor advisory
  2. 2026-08-24 06:51 UTCGHSA enrichment
  3. 2026-08-23 19:20 UTCVendor advisory
  4. 2026-08-23 19:20 UTCGHSA enrichment
  5. 2026-08-23 07:49 UTCEG score recompute
  6. 2026-08-23 07:49 UTCVendor advisory
  7. 2026-08-23 07:49 UTCGHSA enrichment
  8. 2026-08-23 00:19 UTCEPSS rescore
  9. 2026-08-22 20:18 UTCVendor advisory
  10. 2026-08-22 20:18 UTCGHSA enrichment
  11. 2026-08-22 08:47 UTCEG score recompute
  12. 2026-08-22 08:47 UTCVendor advisory
  13. 2026-08-22 08:47 UTCGHSA enrichment
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 21:16 UTCVendor advisory
  16. 2026-08-21 21:16 UTCGHSA enrichment
  17. 2026-08-21 09:45 UTCEG score recompute
  18. 2026-08-21 09:45 UTCVendor advisory
  19. 2026-08-21 09:45 UTCGHSA enrichment
  20. 2026-08-20 22:55 UTCEPSS rescore
  21. 2026-08-20 22:14 UTCVendor advisory
  22. 2026-08-20 22:14 UTCGHSA enrichment
  23. 2026-08-20 10:40 UTCVendor advisory
  24. 2026-08-20 10:40 UTCGHSA enrichment
  25. 2026-08-19 23:10 UTCEG score recompute
  26. 2026-08-19 23:10 UTCVendor advisory
  27. 2026-08-19 23:10 UTCGHSA enrichment
  28. 2026-08-19 17:04 UTCEPSS rescore
  29. 2026-08-19 07:24 UTCVendor advisory
  30. 2026-08-19 07:23 UTCGHSA enrichment
  31. 2026-08-18 19:50 UTCEG score recompute
  32. 2026-08-18 19:50 UTCVendor advisory
  33. 2026-08-18 19:50 UTCGHSA enrichment
  34. 2026-08-18 13:48 UTCEPSS rescore
  35. 2026-08-18 01:54 UTCEG score recompute
  36. 2026-08-18 01:54 UTCVendor advisory
  37. 2026-08-18 01:54 UTCGHSA enrichment
  38. 2026-08-17 13:47 UTCEPSS rescore
  39. 2026-08-17 13:17 UTCVendor advisory
  40. 2026-08-17 13:17 UTCGHSA enrichment
  41. 2026-08-17 01:47 UTCEG score recompute
  42. 2026-08-17 01:47 UTCVendor advisory
  43. 2026-08-17 01:47 UTCGHSA enrichment
  44. 2026-08-16 14:56 UTCEPSS rescore
  45. 2026-08-16 14:16 UTCVendor advisory
  46. 2026-08-16 14:16 UTCGHSA enrichment
  47. 2026-08-16 02:45 UTCEG score recompute
  48. 2026-08-16 02:45 UTCVendor advisory
  49. 2026-08-16 02:45 UTCGHSA enrichment
  50. 2026-08-15 15:14 UTCVendor advisory
  51. 2026-08-15 15:14 UTCGHSA enrichment
  52. 2026-08-15 03:43 UTCEG score recompute
  53. 2026-08-15 03:43 UTCVendor advisory
  54. 2026-08-15 03:43 UTCGHSA enrichment
  55. 2026-08-15 01:30 UTCEPSS rescore
  56. 2026-08-14 16:12 UTCVendor advisory
  57. 2026-08-14 16:12 UTCGHSA enrichment
  58. 2026-08-14 04:42 UTCEG score recompute
  59. 2026-08-14 04:42 UTCVendor advisory
  60. 2026-08-14 04:42 UTCGHSA enrichment
  61. 2026-08-13 22:00 UTCEPSS rescore
  62. 2026-08-13 17:11 UTCVendor advisory
  63. 2026-08-13 17:11 UTCGHSA enrichment
  64. 2026-08-13 05:41 UTCVendor advisory
  65. 2026-08-13 05:41 UTCGHSA enrichment
  66. 2026-08-12 18:09 UTCEG score recompute
  67. 2026-08-12 18:09 UTCVendor advisory
  68. 2026-08-12 18:09 UTCGHSA enrichment
  69. 2026-08-12 13:51 UTCEPSS rescore
  70. 2026-08-12 06:38 UTCVendor advisory
  71. 2026-08-12 06:38 UTCGHSA enrichment
  72. 2026-08-11 19:07 UTCEG score recompute
  73. 2026-08-11 19:07 UTCVendor advisory
  74. 2026-08-11 19:07 UTCGHSA enrichment
  75. 2026-08-11 07:33 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-63919?
CVE-2026-63919 is a high vulnerability published on July 19, 2026. 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 xfrmtransreinject(). That pointer must stay valid until the deferred callback…
When was CVE-2026-63919 disclosed?
CVE-2026-63919 was first published in the National Vulnerability Database on July 19, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63919 actively exploited?
CVE-2026-63919 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.7% of all scored CVEs.
What is the CVSS score of CVE-2026-63919?
CVE-2026-63919 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-63919?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63919, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-63919

Explore →

Is Your Infrastructure Affected by CVE-2026-63919?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs