Answer in brief
CVE-2025-37954 records a High severity (CVSS 7.5) vulnerability in smb: client: Avoid race in open_cached_dir with lease breaks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=81ba10959970d15c388bf29866b01b62f387e6a3 <2ed98e89ebc2e1bc73534dc3c18cb7843a889ff9 || >=81ba10959970d15c388bf29866b01b62f387e6a3 <571dcf3d27b24800c171aea7b5e04ff06d10e2e9 || >=81ba10959970d15c388bf29866b01b62f387e6a3 <2407265dc32bc8cc45b62a612c2a214ba9038e8b || >=81ba10959970d15c388bf29866b01b62f387e6a3 <3ca02e63edccb78ef3659bebc68579c7224a6ca2 || 436be190fbf81e5d84040dabf9cb7be06a94dc5d || >=6.5.10 <6.6 | 2ed98e89ebc2e1bc73534dc3c18cb7843a889ff9, 571dcf3d27b24800c171aea7b5e04ff06d10e2e9, 2407265dc32bc8cc45b62a612c2a214ba9038e8b, 3ca02e63edccb78ef3659bebc68579c7224a6ca2, 6.6 |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
May 20, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.