CVE-2026-46266

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-03. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

A fix is available — apply it.

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

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP

Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous.

socket(AF_INET, SOCK_RAW, 255);

A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes.

inner = IP(src="192.168.2.1", dst="8.8.8.8", proto=255)/Raw("TEST") pkt = IP(src="192.168.1.1", dst="192.168.2.1")/ICMP(type=3, code=4, nexthopmtu=576)/inner

"man 7 raw" states:

A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able to send any IP protocol that is specified in the passed header. Receiving of all IP protocols via IPPROTO_RAW is not possible using raw sockets.

Make sure we drop these malicious packets.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

June 3, 2026

Last Modified

September 2, 2026

Advisory Details (6)

Auto-updated Sep 7, 2026
No patch confirmed yet.
generic

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b
generic

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22
generic

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575
generic

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2
generic

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/47276297140ee6712646f9b19fb04fe26daedd01
generic

inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99

Vendor Advisories for CVE-2026-46266(2)

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-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-40.40) @ questing2026-08-25ubuntu
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1058.61.1) @ 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-xilinx-zynqmp-tools-5.15.0-1076 (5.15.0-1076.80) @ jammy2026-08-25ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.254.238) @ bionic2026-08-25ubuntu
ubuntulinux-virtual (3.13.0.215.225) @ trusty2026-08-25ubuntu
ubuntulinux-tools-azure (4.15.0.1205.220~14.04.1) @ trusty2026-08-25ubuntu
ubuntulinux-tools-kvm-5.4 (5.4.0.1149.145) @ focal2026-08-25ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1110.106) @ jammy2026-08-25ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1080 (5.4.0-1080.84) @ focal2026-08-25ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1054.56) @ jammy2026-08-25ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.254.266~16.04.1) @ xenial2026-08-25ubuntu
ubuntulinux-tools-azure-fde-edge (5.15.0.1118.127~20.04.1) @ focal2026-08-25ubuntu
ubuntulinux-tools-oracle (4.15.0.1158.169~16.04.1) @ xenial2026-08-25ubuntu
ubuntulinux-tools-fips (4.4.0.1127.129) @ xenial2026-08-25ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1114.111) @ jammy2026-08-25ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.284.290) @ xenial2026-08-25ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (5.15.0.190.157) @ jammy2026-08-25ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1028.28) @ noble2026-08-25ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-08-25ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-08-25ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-08-25ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.17.0-1017.19) @ questing2026-08-25ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-08-25ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-08-25ubuntu
ubuntulinux-virtual-hwe-24.04 (6.17.0-40.40~24.04.1) @ noble2026-08-25ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)6.1.187-1—
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 ... 6.18~rc7-1~exp1 (103 versions)6.18.14-1—

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 6× in last 7d / 106× 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 480 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-46266?
CVE-2026-46266 is a critical vulnerability published on June 3, 2026. In the Linux kernel, the following vulnerability has been resolved: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous. socket(AFINET, SOCKRAW, 255); A malicious incoming ICMP packet can set…
When was CVE-2026-46266 disclosed?
CVE-2026-46266 was first published in the National Vulnerability Database on June 3, 2026, with the most recent update on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46266 actively exploited?
CVE-2026-46266 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 69.5% of all scored CVEs.
What is the CVSS score of CVE-2026-46266?
CVE-2026-46266 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-46266?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46266, 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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