Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-29. a secondary CVSS source baseline 7.8; sources differ by 0.0.
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:
s390/pkey: Check length in pkey_pckmo handler implementation
Explicitly check the length of the target buffer in the pkey_pckmo implementation of the key_to_protkey() handler function. The handler function fails, if the generated output data exceeds the length of the provided target buffer.
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).
July 29, 2026
August 17, 2026
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| linux-6.12 | — | 6.12.100-1~deb12u1 | — |
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| linux | 6.12.38-1 ... 6.12.96-1 (31 versions) | 6.12.100-1 | — |
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| linux | 6.12.100-1 ... 7.1~rc7-1~exp1 (157 versions) | 7.1.5-1 | — |
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 114 total refreshes for this CVE.
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-64558
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