CVE-2026-23272

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-03-20. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

netfilter: nf_tables: unconditionally bump set->nelems before insertion

In case that the set is full, a new element gets published then removed without waiting for the RCU grace period, while RCU reader can be walking over it already.

To address this issue, add the element transaction even if set is full, but toggle the set_full flag to report -ENFILE so the abort path safely unwinds the set to its previous state.

As for element updates, decrement set->nelems to restore it.

A simpler fix is to call synchronize_rcu() in the error path. However, with a large batch adding elements to already maxed-out set, this could cause noticeable slowdown of such batches.

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

March 20, 2026

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated Jun 10, 2026
No patch confirmed yet.
generic

netfilter: nf_tables: unconditionally bump set->nelems before insertion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e3ccb11fc8249759d23326038c8db987ddaabc77
generic

netfilter: nf_tables: unconditionally bump set->nelems before insertion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/def602e498a4f951da95c95b1b8ce8ae68aa733a
generic

netfilter: nf_tables: unconditionally bump set->nelems before insertion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ccb8c8f3c1127cf34d18c737309897c68046bf21
generic

netfilter: nf_tables: unconditionally bump set->nelems before insertion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/86bc4b1a0f672d47ac19f9022432cb6a2e01cb33
generic

netfilter: nf_tables: unconditionally bump set->nelems before insertion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6826131c7674329335ca25df2550163eb8a1fd0c

Vendor Advisories for CVE-2026-23272(2)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.1.177—osv
linuxKernel @ 6.18.17—osv

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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
linux-6.16.1.106-3~deb11u1 ... 6.1.176-1~deb11u1 (21 versions)6.1.177-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (54 versions)6.1.177-1—
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 ... 6.19~rc8-1~exp1 (117 versions)6.19.8-1—

All Vendor Advisories

(25)

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 7× in last 7d / 57× 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 196 total refreshes for this CVE.

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

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2026-23272?
CVE-2026-23272 is a high vulnerability published on March 20, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: unconditionally bump set->nelems before insertion In case that the set is full, a new element gets published then removed without waiting for the RCU grace period, while RCU reader can be walking over it…
When was CVE-2026-23272 disclosed?
CVE-2026-23272 was first published in the National Vulnerability Database on March 20, 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-2026-23272 actively exploited?
CVE-2026-23272 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 97.7% of all scored CVEs.
What is the CVSS score of CVE-2026-23272?
CVE-2026-23272 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-23272?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23272, 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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