Vulnerability in Linux

CVE-2025-37954

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (26.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-37954: held from 0.003 to 0.004.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000

Affected products

  • Linux — versions 436be190fbf81e5d84040dabf9cb7be06a94dc5d, 6.14.7, 6.5.10
  • Linux Kernel — versions 6.15

References

Frequently asked questions

What is CVE-2025-37954?
CVE-2025-37954 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2025-05-20.
How severe is CVE-2025-37954?
High severity. CVSS v3 base score is 7.5 out of 10.