Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — hsr: hold rcu and dev lock for hsr_get_port_ndev
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0014 4.0 —
AFFECTED
Product Versions Fixed
Linux ef964411c8ca775967355d855abc56aeaca3c867 – —
Linux 6.14 – 6.12.64
TIMELINE
Apr 16 Reserved by Linux
Sep 23 Published (CNA: Linux)
Jul 30 RESCORED — CVE-2025-39872 (Linux). CVSS 7.8 → 5.5 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
hsr: hold rcu and dev lock for hsr_get_port_ndev
hsr_get_port_ndev calls hsr_for_each_port, which need to hold rcu lock.
On the other hand, before return the port device, we need to hold the
device reference to avoid UaF in the caller function.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| April 16, 2025 | Reserved | Reserved by Linux |
| September 23, 2025 | Published | Published (CNA: Linux) |
| July 30, 2026 | RESCORED | RESCORED — CVE-2025-39872 (Linux). CVSS 7.8 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | ef964411c8ca775967355d855abc56aeaca3c867 | — |
| Linux | Linux | — | 6.14 | 6.12.64 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-39872 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 Wednesday, August 19, 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.