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-2026-64075

CVE-2026-64075HIGH

Linux Linux — fprobe: Fix unregister_fprobe() to wait for RCU grace period

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .0017    5.6     —

AFFECTED
  Product  Versions                                    Fixed
  Linux    4346ba1604093305a287e08eb465a9c15ba05b80 –  —
  Linux    6.14 –                                      6.18.34

TIMELINE
  Jul 19  Reserved by Linux
  Jul 19  Published (CNA: Linux)
  Sep 3   ENRICHED — CVE-2026-64075 (Linux). Received CVSS 7.8 and CPE data from NVD.

CWE-416 · CNA: Linux · CVSS v3.1 · 3 references · NVD status: Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: fprobe: Fix unregister_fprobe() to wait for RCU grace period Commit 4346ba1604093 ("fprobe: Rewrite fprobe on function-graph tracer") changed fprobe to register struct fprobe to an rcu-hlist, but it forgot to wait for RCU GP. Thus there can be use-after-free if the fprobe is released right after unregistering. This can be happened on fprobe event and sample module code. To fix this issue, add synchronize_rcu() in unregister_fprobe(). Note that BPF is OK because fprobe is used as a part of bpf_kprobe_multi_link. This unregisters its fprobe in bpf_kprobe_multi_link_release() and it is deallocated via bpf_kprobe_multi_link_dealloc(), which is invoked from bpf_link_defer_dealloc_rcu_gp() RCU callback. For BPF, this also introduced unregister_fprobe_async() which does NOT wait for RCU grace priod.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 19, 2026	Reserved	Reserved by Linux
July 19, 2026	Published	Published (CNA: Linux)
September 3, 2026	ENRICHED	ENRICHED — CVE-2026-64075 (Linux). Received CVSS 7.8 and CPE data from NVD.

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Linux	Linux	—	4346ba1604093305a287e08eb465a9c15ba05b80	—
Linux	Linux	—	6.14	6.18.34

Weaknesses

CWE-416

References (3)

Authoritative record: CVE-2026-64075 at cve.org

Vendors: linux

Weaknesses: CWE-416

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-64075 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.