Threat Intelligence / CVE / CVE-2026-64507

CVE-2026-64507 — Linux

EPSS 0.1% (higher than 4.6% of all scored CVEs) · Priority 0.2/10 · Published 2026-07-25

As of 2026-08-19, CVE-2026-64507 is a vulnerability in Linux, EPSS 0.1% (4.6th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-64507, most recently “Spectre-v2 Branch Target Reuse (BTR) Attack Leaks Linux Kernel Memory Despite Existing Defenses (CVE-2026-64507, CVE-2026-64508)”.

Last updated: 2026-08-19

What is CVE-2026-64507?

In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Enable IBPB flush on BPF JIT allocation Enable hardening against JIT spraying when Spectre-v2 mitigations are in use. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip enabling the IBPB flush if the BPF dispatcher is already using a retpoline sequence. This hardening applies only when BPF-JIT is in use. Guard the enabling under CONFIG_BPF_JIT so that bugs.c still builds with CONFIG_BPF_JIT=n.

1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 68 days ago.

Severity and exploitation probability

EPSS (FIRST)
0.1% probability of exploitation in the next 30 days, higher than 4.6% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
0.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-07-25, last modified 2026-08-19

Is CVE-2026-64507 being exploited?

No public exploitation evidence for CVE-2026-64507 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-08-19. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

Affected products and versions

How to fix CVE-2026-64507

No vendor patch reference has been recorded for CVE-2026-64507 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-64507

1 tracked threat in the Threadlinqs corpus references CVE-2026-64507, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Other references

Showing 5 of 6 recorded references.

Full detection coverage & IOCs for threats exploiting CVE-2026-64507 are available via the Threadlinqs MCP server (Purple tier). View plans →

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