CVE-2026-63858

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-19. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: add hook transactions for device deletions

Restore the flag that indicates that the hook is going away, ie. NFT_HOOK_REMOVE, but add a new transaction object to track deletion of hooks without altering the basechain/flowtable hook_list during the preparation phase.

The existing approach that moves the hook from the basechain/flowtable hook_list to transaction hook_list breaks netlink dump path readers of this RCU-protected list.

It should be possible use an array for nft_trans_hook to store the deleted hooks to compact the representation but I am not expecting many hook object, specially now that wildcard support for devices is in place.

Note that the nft_trans_chain_hooks() list contains a list of struct nft_trans_hook objects for DELCHAIN and DELFLOWTABLE commands, while this list stores struct nft_hook objects for NEWCHAIN and NEWFLOWTABLE. Note that new commands can be updated to use nft_trans_hook for consistency.

This patch also adapts the event notification path to deal with the list of hook transactions.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

July 19, 2026

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

netfilter: nf_tables: add hook transactions for device deletions - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4e69bfb32b2db323d9205fdb30e284481b37817c
generic

netfilter: nf_tables: add hook transactions for device deletions - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/10f79dbd7719d1da9f5884d13060322d8729f091

Vendor Advisories for CVE-2026-63858(2)

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

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-11ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-11ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-11ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-11ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-11ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-11ubuntu

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 ... 7.2~rc5-1~exp1 (496 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (350 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (174 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

All Vendor Advisories

(6)

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 17× in last 7d / 119× 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 239 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-63858?
CVE-2026-63858 is a high vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: add hook transactions for device deletions Restore the flag that indicates that the hook is going away, ie. NFTHOOKREMOVE, but add a new transaction object to track deletion of hooks without altering the…
When was CVE-2026-63858 disclosed?
CVE-2026-63858 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-2026-63858 actively exploited?
CVE-2026-63858 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.6% of all scored CVEs.
What is the CVSS score of CVE-2026-63858?
CVE-2026-63858 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-63858?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63858, 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

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