CVE-2026-23459

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-04-03. NVD baseline CVSS 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: 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:

ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS

Blamed commits forgot that vxlan/geneve use udp_tunnel[6]_xmit_skb() which call iptunnel_xmit_stats().

iptunnel_xmit_stats() was assuming tunnels were only using NETDEV_PCPU_STAT_TSTATS.

@syncp offset in pcpu_sw_netstats and pcpu_dstats is different.

32bit kernels would either have corruptions or freezes if the syncp sequence was overwritten.

This patch also moves pcpu_stat_type closer to dev->{t,d}stats to avoid a potential cache line miss since iptunnel_xmit_stats() needs to read it.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity82% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

April 3, 2026

Last Modified

July 24, 2026

Advisory Details (2)

Auto-updated May 3, 2026
No patch confirmed yet.
generic

ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8431c602f551549f082bbfa67f3003f2d8e3e132
generic

ip_tunnel: adapt iptunnel_xmit_stats() to NETDEV_PCPU_STAT_DSTATS - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0d087d00161f562d5047cc4009bb0c6a19daf9f1

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 6.19.10—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.

Data Freshness Timeline

(refreshed 14× 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 133 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-23459?
CVE-2026-23459 is a high vulnerability published on April 3, 2026. In the Linux kernel, the following vulnerability has been resolved: iptunnel: adapt iptunnelxmitstats() to NETDEVPCPUSTATDSTATS Blamed commits forgot that vxlan/geneve use udptunnel[6]xmit_skb() which call iptunnelxmitstats(). iptunnelxmitstats() was assuming tunnels were only using…
When was CVE-2026-23459 disclosed?
CVE-2026-23459 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23459 actively exploited?
CVE-2026-23459 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 77.9% of all scored CVEs.
What is the CVSS score of CVE-2026-23459?
CVE-2026-23459 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-23459?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23459, 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.

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