CVE-2026-64056

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-19. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

net: ethernet: cortina: Make RX SKB per-port

The SKB used to assemble packets from fragments in gmac_rx() is static local, but the Gemini has two ethernet ports, meaning there can be races between the ports on a bad day if a device is using both.

Make the RX SKB a per-port variable and carry it over between invocations in the port struct instead.

Zero the pointer once we call napi_gro_frags(), on error (after calling napi_free_frags()) or if the port is stopped.

Zero it in some place where not strictly necessary just to emphasize what is going on.

This was found by Sashiko during normal patch review.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

July 19, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 26, 2026
No patch confirmed yet.
generic

net: ethernet: cortina: Make RX SKB per-port - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/06937db21ee311ed07eba47954447245041a982d
generic

net: ethernet: cortina: Make RX SKB per-port - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/67a35e7da7ef9d2f000aa758552a128324c604a0
generic

net: ethernet: cortina: Make RX SKB per-port - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cfd62907f3cdbc3b6da8f49ba907c0390018fe5e
generic

net: ethernet: cortina: Make RX SKB per-port - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/72158ea185b27afae163949b0e86164cb6b64e55
generic

net: ethernet: cortina: Make RX SKB per-port - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3b249988d774dacf13b203817e971934a42243c4
generic

net: ethernet: cortina: Make RX SKB per-port - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6bba24e9ebe6f1c0b356cd471e36bdc7fa434897
generic

net: ethernet: cortina: Make RX SKB per-port - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b6b22824b30e48ce1df3a2e80990f4b8505deb50
generic

net: ethernet: cortina: Make RX SKB per-port - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/27856d533eca3804008695f61c1e4d5ff984196b

Vendor Advisories for CVE-2026-64056(1)

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

Patch Availability(16)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-30ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-30ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-30ubuntu

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 ... 5.10.92-2 (54 versions)5.10.259-1—
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 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (138 versions)7.0.12-1—

All Vendor Advisories

(16)

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 58× in last 7d / 351× 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 439 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64056?
CVE-2026-64056 is a critical vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: net: ethernet: cortina: Make RX SKB per-port The SKB used to assemble packets from fragments in gmac_rx() is static local, but the Gemini has two ethernet ports, meaning there can be races between the ports on a bad day if a device…
When was CVE-2026-64056 disclosed?
CVE-2026-64056 was first published in the National Vulnerability Database on July 19, 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-2026-64056 actively exploited?
CVE-2026-64056 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.3% of all scored CVEs.
What is the CVSS score of CVE-2026-64056?
CVE-2026-64056 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-64056?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64056, 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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