CVE-2026-64288

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 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:

KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB

VNCR TLB invalidation occurs from MMU notifiers or TLBI instructions, and either can race against a vcpu not being onlined yet (no pseudo-TLB allocated). Similarly, the TLB might be invalid, and the invalidation should be skipped in this case.

Both kvm_invalidate_vncr_ipa() and kvm_invalidate_vncr_va() are expected to perform the same checks, except that the latter doesn't check for the allocation and blindly dereferences the pointer.

Solve this by introducing a new iterator built on top of the usual kvm_for_each_vcpu() that checks for both of the above conditions, and convert the two users to it.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 17, 2026

Advisory Details (3)

Auto-updated Aug 13, 2026
No patch confirmed yet.
generic

KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7c73a269a880b1399baacfb9d521415e6ef7ecc2
generic

KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5fd30133af864a1de0a0bd87d3fe3cf23205fbc7
generic

KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4be6cbeb93d26994bd1827ddbce391e3c4395c8f

Vendor Advisories for CVE-2026-64288(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (156 versions)7.1.4-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 59× 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.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-30 00:12 UTCEG score recompute
  3. 2026-08-30 00:11 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 23:09 UTCEG score recompute
  6. 2026-08-27 23:08 UTCGHSA enrichment
  7. 2026-08-26 21:27 UTCEG score recompute
  8. 2026-08-26 21:27 UTCGHSA enrichment
  9. 2026-08-26 14:47 UTCEPSS rescore
  10. 2026-08-25 19:45 UTCEG score recompute
  11. 2026-08-25 19:45 UTCGHSA enrichment
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-24 18:03 UTCEG score recompute
  14. 2026-08-24 18:03 UTCGHSA enrichment
  15. 2026-08-23 15:35 UTCGHSA enrichment
  16. 2026-08-22 13:54 UTCEG score recompute
  17. 2026-08-22 13:54 UTCGHSA enrichment
  18. 2026-08-21 23:49 UTCEPSS rescore
  19. 2026-08-21 12:12 UTCEG score recompute
  20. 2026-08-21 12:12 UTCGHSA enrichment
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-20 10:30 UTCEG score recompute
  23. 2026-08-20 10:30 UTCGHSA enrichment
  24. 2026-08-19 17:04 UTCEPSS rescore
  25. 2026-08-19 08:48 UTCEG score recompute
Show 52 more
  1. 2026-08-19 08:48 UTCGHSA enrichment
  2. 2026-08-18 13:48 UTCEPSS rescore
  3. 2026-08-18 07:06 UTCEG score recompute
  4. 2026-08-18 07:06 UTCGHSA enrichment
  5. 2026-08-17 13:47 UTCEPSS rescore
  6. 2026-08-17 05:21 UTCGHSA enrichment
  7. 2026-08-16 20:21 UTCEG score recompute
  8. 2026-08-16 20:21 UTCGHSA enrichment
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-15 18:40 UTCEG score recompute
  11. 2026-08-15 18:40 UTCGHSA enrichment
  12. 2026-08-15 01:30 UTCEPSS rescore
  13. 2026-08-14 16:58 UTCEG score recompute
  14. 2026-08-14 16:58 UTCGHSA enrichment
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-13 15:16 UTCEG score recompute▲ 5.50
  17. 2026-08-13 15:16 UTCGHSA enrichment
  18. 2026-08-13 15:15 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  19. 2026-08-12 13:51 UTCEPSS rescore
  20. 2026-08-11 13:47 UTCGHSA enrichment
  21. 2026-08-11 00:00 UTCEPSS rescore
  22. 2026-08-09 13:47 UTCEPSS rescore
  23. 2026-08-08 16:37 UTCEPSS rescore
  24. 2026-08-08 14:09 UTCGHSA enrichment
  25. 2026-08-06 13:47 UTCEPSS rescore
  26. 2026-08-05 19:17 UTCEPSS rescore
  27. 2026-08-05 19:17 UTCEPSS rescore
  28. 2026-08-05 14:30 UTCGHSA enrichment
  29. 2026-08-04 15:10 UTCEPSS rescore
  30. 2026-08-04 10:39 UTCEPSS rescore
  31. 2026-08-03 10:36 UTCEPSS rescore
  32. 2026-08-02 14:53 UTCGHSA enrichment
  33. 2026-08-02 02:27 UTCEPSS rescore
  34. 2026-08-01 04:16 UTCEPSS rescore
  35. 2026-07-30 16:28 UTCEPSS rescore
  36. 2026-07-30 15:15 UTCEG score recompute
  37. 2026-07-30 15:15 UTCGHSA enrichment
  38. 2026-07-30 01:30 UTCEPSS rescore
  39. 2026-07-30 01:30 UTCEPSS rescore
  40. 2026-07-29 02:30 UTCEG score recompute
  41. 2026-07-29 02:30 UTCGHSA enrichment
  42. 2026-07-28 15:37 UTCEPSS rescore
  43. 2026-07-27 14:14 UTCEPSS rescore
  44. 2026-07-26 14:54 UTCEPSS rescore
  45. 2026-07-26 14:54 UTCEPSS rescore
  46. 2026-07-26 02:53 UTCEG score recompute
  47. 2026-07-26 02:52 UTCGHSA enrichment
  48. 2026-07-25 14:18 UTCEPSS rescore
  49. 2026-07-25 14:18 UTCEPSS rescore
  50. 2026-07-25 10:39 UTCNVD update
  51. 2026-07-25 09:40 UTCEG score recompute
  52. 2026-07-25 09:21 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64288?
CVE-2026-64288 is a medium vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB VNCR TLB invalidation occurs from MMU notifiers or TLBI instructions, and either can race against a vcpu not being onlined yet (no pseudo-TLB allocated). Similarly, the TLB…
When was CVE-2026-64288 disclosed?
CVE-2026-64288 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64288 actively exploited?
CVE-2026-64288 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 95.2% of all scored CVEs.
What is the CVSS score of CVE-2026-64288?
CVE-2026-64288 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-64288?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64288, 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-2026-64288

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