CVE-2026-46120

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-28. 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

A fix is available — apply it.

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)
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
3%
KEV
Not listed

Published

May 28, 2026

Last Modified

August 5, 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(6)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-25ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-25ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-25ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-25ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-25ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-08-25ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-25ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-25ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-25ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-25ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1061.64~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-25ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-25ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-25ubuntu
redhatkernel-rt-0:4.18.0-553.157.1.rt7.498.el8_102026-08-20redhat
redhatkernel-0:4.18.0-553.157.1.el8_102026-08-20redhat
redhatkernel-0:5.14.0-687.41.1.el9_82026-08-20redhat

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 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.88-1~bpo12+1 (21 versions)6.12.88-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (133 versions)7.0.7-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(22)

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 5× in last 7d / 86× 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 275 total refreshes for this CVE.

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

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 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-2026-46120 actively exploited?
CVE-2026-46120 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 97.5% of all scored CVEs.
What is the CVSS score of CVE-2026-46120?
CVE-2026-46120 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
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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