CVE-2026-46120

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 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:

ip6_gre: Use cached t->net in ip6erspan_changelink().

After commit 5e72ce3e3980 ("net: ipv6: Use link netns in newlink() of rtnl_link_ops"), ip6erspan_newlink() correctly resolves the per-netns ip6gre hash via link_net. ip6erspan_changelink() was not converted in that series and still uses dev_net(dev), which diverges from the device's creation netns after IFLA_NET_NS_FD migration.

This re-inserts the tunnel into the wrong per-netns hash. The original netns keeps a stale entry. When that netns is later destroyed, ip6gre_exit_rtnl_net() walks the stale entry, producing a slab-use-after-free reported by KASAN, followed by a kernel BUG at net/core/dev.c (LIST_POISON1) in unregister_netdevice_many_notify().

Reachable from an unprivileged user namespace (unshare --user --map-root-user --net).

ip6gre_changelink() earlier in the same file already uses the cached t->net; only ip6erspan_changelink() has the wrong shape.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
2.6%
KEV
Not listed

Published

May 28, 2026

Last Modified

June 24, 2026

Advisory Details (8)

Auto-updated Jun 4, 2026
No patch confirmed yet.
generic

ip6_gre: Use cached t->net in ip6erspan_changelink(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eca62bb0569de4d43a4dac06a2092a9d4ca1d702
generic

ip6_gre: Use cached t->net in ip6erspan_changelink(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82
generic

ip6_gre: Use cached t->net in ip6erspan_changelink(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cf7fc624329e76c6394653d12353e1d033adea91
generic

ip6_gre: Use cached t->net in ip6erspan_changelink(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7bd0f2b162b426b343a114e1b329f0d8d14fdc6e
generic

ip6_gre: Use cached t->net in ip6erspan_changelink(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/311fdd26eb4443d43b909cc67a10f3a5fd1b21b2
generic

ip6_gre: Use cached t->net in ip6erspan_changelink(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1d324c2f43f70c965f25c58cc3611c779adbe47e
generic

ip6_gre: Use cached t->net in ip6erspan_changelink(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0fcf6731706f73494245a9c0d64f93bebf95bb51
generic

ip6_gre: Use cached t->net in ip6erspan_changelink(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/01b71ff2857d3598337de11e7840a8e3ff21553c

Vendor Advisories for CVE-2026-46120(2)

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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 85× 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 187 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-46120?
CVE-2026-46120 is a high vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: ip6gre: Use cached t->net in ip6erspanchangelink(). After commit 5e72ce3e3980 ("net: ipv6: Use link netns in newlink() of rtnllinkops"), ip6erspan_newlink() correctly resolves the per-netns ip6gre hash via linknet.…
When was CVE-2026-46120 disclosed?
CVE-2026-46120 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on June 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46120 actively exploited?
CVE-2026-46120 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46120?
CVE-2026-46120 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-46120?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46120, 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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