CVE-2026-64082

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-19. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
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:

riscv: Fix register corruption from uninitialized cregs on error

compat_riscv_gpr_set() calls cregs_to_regs() unconditionally, even when user_regset_copyin() fails. Since cregs is an uninitialized stack variable, a copyin failure causes uninitialized stack data to be written into the target task's pt_regs, corrupting its register state and potentially leaking kernel stack contents.

compat_restore_sigcontext() has the same issue: it calls cregs_to_regs() even when __copy_from_user() fails, leading to the same corruption of the signal-returning task's register state on error.

Only call cregs_to_regs() when the user copy succeeds.

CVSS v3
7.8
EG Score
7.8(high)
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
2%
KEV
Not listed

Published

July 19, 2026

Last Modified

July 20, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

riscv: Fix register corruption from uninitialized cregs on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9e020156833f1ad0d425a1e3d85b65639f1c1c50
generic

riscv: Fix register corruption from uninitialized cregs on error - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6ebcbb53fc9bc30843054ed99fd60b8e542628f4

Vendor Advisories for CVE-2026-64082(2)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-07-26ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-07-26ubuntu

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.

All Vendor Advisories

(2)

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 24× in last 7d / 27× 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. 2026-07-27 00:04 UTCEG score recompute
  2. 2026-07-27 00:04 UTCGHSA enrichment
  3. 2026-07-26 14:54 UTCEPSS rescore
  4. 2026-07-26 14:54 UTCEPSS rescore
  5. 2026-07-26 10:54 UTCEG score recompute
  6. 2026-07-26 10:54 UTCVendor advisory
  7. 2026-07-26 10:54 UTCGHSA enrichment
  8. 2026-07-25 14:18 UTCEPSS rescore
  9. 2026-07-25 14:18 UTCEPSS rescore
  10. 2026-07-24 14:18 UTCEPSS rescore
  11. 2026-07-24 14:18 UTCEPSS rescore
  12. 2026-07-23 14:18 UTCEPSS rescore
  13. 2026-07-23 14:18 UTCEPSS rescore
  14. 2026-07-23 03:22 UTCEG score recompute
  15. 2026-07-22 14:08 UTCEPSS rescore
  16. 2026-07-22 14:08 UTCEPSS rescore
  17. 2026-07-21 15:25 UTCEPSS rescore
  18. 2026-07-21 15:25 UTCEPSS rescore
  19. 2026-07-20 17:25 UTCEG score recompute
  20. 2026-07-20 17:25 UTCGHSA enrichment
  21. 2026-07-20 17:08 UTCEPSS rescore
  22. 2026-07-20 14:35 UTCEG score recompute▲ 7.80
  23. 2026-07-20 14:35 UTCGHSA enrichment
  24. 2026-07-20 14:32 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  25. 2026-07-19 17:49 UTCNVD update
Show 2 more
  1. 2026-07-19 16:11 UTCEG score recompute
  2. 2026-07-19 16:03 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-64082?
CVE-2026-64082 is a high vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: riscv: Fix register corruption from uninitialized cregs on error compatriscvgprset() calls cregsto_regs() unconditionally, even when userregsetcopyin() fails. Since cregs is an uninitialized stack variable, a copyin failure causes…
When was CVE-2026-64082 disclosed?
CVE-2026-64082 was first published in the National Vulnerability Database on July 19, 2026, with the most recent update on July 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64082 actively exploited?
CVE-2026-64082 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 97.8% of all scored CVEs.
What is the CVSS score of CVE-2026-64082?
CVE-2026-64082 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-64082?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64082, 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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