CVE-2026-31418

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-04-13. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: 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: ipset: drop logically empty buckets in mtype_del

mtype_del() counts empty slots below n->pos in k, but it only drops the bucket when both n->pos and k are zero. This misses buckets whose live entries have all been removed while n->pos still points past deleted slots.

Treat a bucket as empty when all positions below n->pos are unused and release it directly instead of shrinking it further.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

April 13, 2026

Last Modified

July 14, 2026

Advisory Details (10)

Auto-updated Jul 16, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

SSA-082556

https://cert-portal.siemens.com/productcert/html/ssa-082556.html
generic

SSA-019113

https://cert-portal.siemens.com/productcert/html/ssa-019113.html
generic

netfilter: ipset: drop logically empty buckets in mtype_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ceacaa76f221a6577aba945bb8873c2e640aeba4
generic

netfilter: ipset: drop logically empty buckets in mtype_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c098ff857e7ca923539164af5b3c2fe3e8f8afaf
generic

netfilter: ipset: drop logically empty buckets in mtype_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b7eef00f08b92b0b9efe8ae0df6d0005e6199323
generic

netfilter: ipset: drop logically empty buckets in mtype_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb
generic

netfilter: ipset: drop logically empty buckets in mtype_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9862ef9ab0a116c6dca98842aab7de13a252ae02
generic

netfilter: ipset: drop logically empty buckets in mtype_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6cea34d7ec6829b62f521a37a287f670144a2233
generic

netfilter: ipset: drop logically empty buckets in mtype_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4
generic

netfilter: ipset: drop logically empty buckets in mtype_del - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/58f3a14826d4e6b0d5421f1a64be280b48601ea2

Vendor Advisories for CVE-2026-31418(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.253—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 ... 5.10.92-2 (53 versions)5.10.257-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.164-1~deb11u1 (16 versions)6.1.170-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (122 versions)6.19.12-1—

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 48× 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 200 total refreshes for this CVE.

  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:11 UTCEPSS rescore
  3. 2026-09-02 05:28 UTCOSV refresh
  4. 2026-09-01 13:53 UTCEPSS rescore
  5. 2026-09-01 04:39 UTCEPSS rescore
  6. 2026-09-01 04:39 UTCEPSS rescore
  7. 2026-08-30 19:17 UTCEPSS rescore
  8. 2026-08-30 01:22 UTCEPSS rescore
  9. 2026-08-28 21:41 UTCEPSS rescore
  10. 2026-08-27 14:25 UTCEPSS rescore
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-24 14:17 UTCEPSS rescore
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-20 22:55 UTCEPSS rescore
  16. 2026-08-20 22:55 UTCEPSS rescore
  17. 2026-08-19 17:03 UTCEPSS rescore
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 06:55 UTCEG score recompute
  21. 2026-08-16 06:55 UTCVendor advisory
  22. 2026-08-16 06:55 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 01:30 UTCEPSS rescore
  25. 2026-08-14 04:56 UTCEG score recompute
Show 75 more
  1. 2026-08-14 04:56 UTCVendor advisory
  2. 2026-08-14 04:56 UTCGHSA enrichment
  3. 2026-08-13 22:00 UTCEPSS rescore
  4. 2026-08-12 19:10 UTCEG score recompute
  5. 2026-08-12 19:10 UTCVendor advisory
  6. 2026-08-12 19:10 UTCGHSA enrichment
  7. 2026-08-12 13:50 UTCEPSS rescore
  8. 2026-08-11 04:39 UTCEG score recompute
  9. 2026-08-11 04:39 UTCVendor advisory
  10. 2026-08-11 04:39 UTCGHSA enrichment
  11. 2026-08-11 00:00 UTCEPSS rescore
  12. 2026-08-10 04:30 UTCEG score recompute
  13. 2026-08-10 04:30 UTCVendor advisory
  14. 2026-08-10 04:30 UTCGHSA enrichment
  15. 2026-08-09 13:46 UTCEPSS rescore
  16. 2026-08-09 04:20 UTCEG score recompute
  17. 2026-08-09 04:20 UTCVendor advisory
  18. 2026-08-09 04:20 UTCGHSA enrichment
  19. 2026-08-08 16:37 UTCEPSS rescore
  20. 2026-08-07 14:00 UTCEG score recompute
  21. 2026-08-07 14:00 UTCVendor advisory
  22. 2026-08-07 14:00 UTCGHSA enrichment
  23. 2026-08-06 13:46 UTCEPSS rescore
  24. 2026-08-05 23:35 UTCEG score recompute
  25. 2026-08-05 23:35 UTCVendor advisory
  26. 2026-08-05 23:35 UTCGHSA enrichment
  27. 2026-08-05 19:17 UTCEPSS rescore
  28. 2026-08-04 15:10 UTCEPSS rescore
  29. 2026-08-04 10:38 UTCEPSS rescore
  30. 2026-08-03 21:49 UTCEG score recompute
  31. 2026-08-03 21:49 UTCVendor advisory
  32. 2026-08-03 21:49 UTCGHSA enrichment
  33. 2026-08-03 10:36 UTCEPSS rescore
  34. 2026-08-02 13:34 UTCEG score recompute
  35. 2026-08-02 13:34 UTCVendor advisory
  36. 2026-08-02 13:34 UTCGHSA enrichment
  37. 2026-08-02 02:27 UTCEPSS rescore
  38. 2026-08-01 04:16 UTCEPSS rescore
  39. 2026-07-30 16:27 UTCEPSS rescore
  40. 2026-07-30 01:30 UTCEPSS rescore
  41. 2026-07-28 15:36 UTCEPSS rescore
  42. 2026-07-26 14:54 UTCEPSS rescore
  43. 2026-07-26 14:54 UTCEPSS rescore
  44. 2026-07-25 14:18 UTCEPSS rescore
  45. 2026-07-25 14:17 UTCEPSS rescore
  46. 2026-07-24 14:17 UTCEPSS rescore
  47. 2026-07-23 14:18 UTCEPSS rescore
  48. 2026-07-23 14:18 UTCEPSS rescore
  49. 2026-07-23 03:08 UTCEG score recompute
  50. 2026-07-22 14:08 UTCEPSS rescore
  51. 2026-07-22 14:08 UTCEPSS rescore
  52. 2026-07-21 15:24 UTCEPSS rescore
  53. 2026-07-21 15:24 UTCEPSS rescore
  54. 2026-07-20 17:08 UTCEPSS rescore
  55. 2026-07-20 17:08 UTCEPSS rescore
  56. 2026-07-20 12:02 UTCOSV refresh
  57. 2026-07-19 14:31 UTCEPSS rescore
  58. 2026-07-19 14:31 UTCEPSS rescore
  59. 2026-07-19 02:29 UTCEPSS rescore
  60. 2026-07-18 10:04 UTCEPSS rescore
  61. 2026-07-18 10:04 UTCEPSS rescore
  62. 2026-07-16 17:03 UTCEPSS rescore
  63. 2026-07-16 17:03 UTCEPSS rescore
  64. 2026-07-15 16:57 UTCEPSS rescore
  65. 2026-07-15 16:57 UTCEPSS rescore
  66. 2026-07-15 02:00 UTCEPSS rescore
  67. 2026-07-15 02:00 UTCEPSS rescore
  68. 2026-07-14 13:19 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  69. 2026-07-14 13:11 UTCMITRE cvelistV5
  70. 2026-07-13 22:30 UTCEPSS rescore
  71. 2026-07-13 06:13 UTCEPSS rescore
  72. 2026-07-13 06:13 UTCEPSS rescore
  73. 2026-07-12 05:46 UTCEPSS rescore
  74. 2026-07-11 08:27 UTCEPSS rescore
  75. 2026-07-09 19:10 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-31418?
CVE-2026-31418 is a medium vulnerability published on April 13, 2026. In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: drop logically empty buckets in mtype_del mtype_del() counts empty slots below n->pos in k, but it only drops the bucket when both n->pos and k are zero. This misses buckets whose live entries have all been…
When was CVE-2026-31418 disclosed?
CVE-2026-31418 was first published in the National Vulnerability Database on April 13, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31418 actively exploited?
CVE-2026-31418 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 98.0% of all scored CVEs.
What is the CVSS score of CVE-2026-31418?
CVE-2026-31418 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-31418?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31418, 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-2026-31418

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