CVE-2025-37954smb: client: Avoid race in open_cached_dir with lease breaks
Updated under an hour ago ()
Does this affect you?
It affects Linux and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | 81ba10959970d15c388bf29866b01b62f387e6a3 builds before 2ed98e89ebc2e1bc73534dc3c18cb7843a889ff9; from 81ba10959970d15c388bf29866b01b62f387e6a3 before 571dcf3d27b24800c171aea7b5e04ff06d10e2e9; from 81ba10959970d15c388bf29866b01b62f387e6a3 before 2407265dc32bc8cc45b62a612c2a214ba9038e8b; 81ba10959970d15c388bf29866b01b62f387e6a3 builds before 3ca02e63edccb78ef3659bebc68579c7224a6ca2; 436be190fbf81e5d84040dabf9cb7be06a94dc5d; from 6.5.10 before 6.6 | CNA record |
linux linux_kernel linux:linux_kernel | before 6.6.91; from 6.7 before 6.12.29; from 6.13 before 6.14.7; 6.15; 6.15; 6.15; 6.15; 6.15 | NVD |
References
- https://git.kernel.org/stable/c/2ed98e89ebc2e1bc73534dc3c18cb7843a889ff9patch
- https://git.kernel.org/stable/c/571dcf3d27b24800c171aea7b5e04ff06d10e2e9patch
- https://git.kernel.org/stable/c/2407265dc32bc8cc45b62a612c2a214ba9038e8bpatch
- https://git.kernel.org/stable/c/3ca02e63edccb78ef3659bebc68579c7224a6ca2patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.