CVE-2026-64522

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA

mlx5e_xfrm_add_state() handles acquire-flow temporary SAs by allocating software state and skipping hardware offload setup.

That path jumps to the common success label before taking the eswitch mode block. After tunnel-mode validation was moved earlier, the common success label unconditionally calls mlx5_eswitch_unblock_mode(). For acquire SAs, this decrements esw->offloads.num_block_mode without a matching increment.

Return directly after installing the acquire SA offload handle, so only the paths that successfully called mlx5_eswitch_block_mode() call the matching unblock.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/abe003b33223ff33552f291644bf35d9c2f992fb
generic

net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ecafd8284e527666e83261e6e57a7c7341d591cb
generic

net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b5bd4249e430f5963d559708ee96a671716d2400

Vendor Advisories for CVE-2026-64522(1)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-15ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-15ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-15ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-15ubuntu

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)7.0.12-1—

All Vendor Advisories

(4)

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 28× in last 7d / 127× 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 253 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64522?
CVE-2026-64522 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA mlx5exfrmadd_state() handles acquire-flow temporary SAs by allocating software state and skipping hardware offload setup. That path jumps to the common success label…
When was CVE-2026-64522 disclosed?
CVE-2026-64522 was first published in the National Vulnerability Database on July 25, 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-2026-64522 actively exploited?
CVE-2026-64522 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 72.6% of all scored CVEs.
What is the CVSS score of CVE-2026-64522?
CVE-2026-64522 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-64522?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64522, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-64522

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