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 — smb: client: Avoid race in open_cached_dir with lease breaks
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0032 24.7 —
AFFECTED
Product Versions Fixed
Linux 81ba10959970d15c388bf29866b01b62f387e6a3 – —
Linux 6.6 – 6.6.91
TIMELINE
Apr 16 Reserved by Linux
May 20 Published (CNA: Linux)
Jul 30 RESCORED — CVE-2025-37954 (Linux). CVSS 7.5 → 5.5 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: Avoid race in open_cached_dir with lease breaks
A pre-existing valid cfid returned from find_or_create_cached_dir might
race with a lease break, meaning open_cached_dir doesn't consider it
valid, and thinks it's newly-constructed. This leaks a dentry reference
if the allocation occurs before the queued lease break work runs.
Avoid the race by extending holding the cfid_list_lock across
find_or_create_cached_dir and when the result is checked.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| April 16, 2025 | Reserved | Reserved by Linux |
| May 20, 2025 | Published | Published (CNA: Linux) |
| July 30, 2026 | RESCORED | RESCORED — CVE-2025-37954 (Linux). CVSS 7.5 → 5.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | 81ba10959970d15c388bf29866b01b62f387e6a3 | — |
| Linux | Linux | — | 6.6 | 6.6.91 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-37954 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.