Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-64306
Linux Linux — crypto: drbg - Fix returning success on failure in CTR_DRBG
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0016 4.5 —
AFFECTED
Product Versions Fixed
Linux cde001e4c3c3625c60b68a83eb1f1c2572dee07a – —
Linux 4.1 – 5.10.261
TIMELINE
Jul 19 Reserved by Linux
Jul 25 Published (CNA: Linux)
Sep 3 ENRICHED — CVE-2026-64306 (Linux). Received CVSS 5.5 and CPE data from NVD.
Description
In the Linux kernel, the following vulnerability has been resolved:
crypto: drbg - Fix returning success on failure in CTR_DRBG
drbg_ctr_generate() sometimes returns success when it fails, leaving the
output buffer uninitialized. Fix it.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| July 19, 2026 | Reserved | Reserved by Linux |
| July 25, 2026 | Published | Published (CNA: Linux) |
| September 3, 2026 | ENRICHED | ENRICHED — CVE-2026-64306 (Linux). Received CVSS 5.5 and CPE data from NVD. |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | cde001e4c3c3625c60b68a83eb1f1c2572dee07a | — |
| Linux | Linux | — | 4.1 | 5.10.261 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-64306 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.