Answer in brief
CVE-2025-39825 records a Unknown severity vulnerability in smb: client: fix race with concurrent opens in rename(2). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC CN 4100 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2025-39825 records a Unknown severity vulnerability in smb: client: fix race with concurrent opens in rename(2). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC CN 4100 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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), Siemens/SIMATIC CN 4100 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <c9e7de284da0be5b44dbe79d71573f9f7f9b144c || >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <24b9ed739c8c5b464d983e12cf308982f3ae93c2 || >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <c9991af5e09924f6f3b3e6996a5e09f9504b4358 || >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <289f945acb20b9b54fe4d13895e44aa58965ddb2 || >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <d84291fc7453df7881a970716f8256273aca5747 | c9e7de284da0be5b44dbe79d71573f9f7f9b144c, 24b9ed739c8c5b464d983e12cf308982f3ae93c2, c9991af5e09924f6f3b3e6996a5e09f9504b4358, 289f945acb20b9b54fe4d13895e44aa58965ddb2, d84291fc7453df7881a970716f8256273aca5747 |
| Linux/Linuxgeneric | 5.13 | Not reported |
| Siemens/SIMATIC CN 4100generic | >=0 <V5.0 | V5.0 |
Published upstream
Sep 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: fix race with concurrent opens in rename(2) Besides sending the rename request to the server, the rename process also involves closing any deferred close, waiting for outstanding I/O to complete as well as marking all existing open handles as deleted to prevent them from deferring closes, which increases the race window for potential concurrent opens on the target file. Fix this by unhashing the dentry in advance to prevent any concurrent opens on the target.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. 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), Siemens/SIMATIC CN 4100 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <c9e7de284da0be5b44dbe79d71573f9f7f9b144c || >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <24b9ed739c8c5b464d983e12cf308982f3ae93c2 || >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <c9991af5e09924f6f3b3e6996a5e09f9504b4358 || >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <289f945acb20b9b54fe4d13895e44aa58965ddb2 || >=78c09634f7dc061a3bd09704cdbebb3762a45cdf <d84291fc7453df7881a970716f8256273aca5747 | c9e7de284da0be5b44dbe79d71573f9f7f9b144c, 24b9ed739c8c5b464d983e12cf308982f3ae93c2, c9991af5e09924f6f3b3e6996a5e09f9504b4358, 289f945acb20b9b54fe4d13895e44aa58965ddb2, d84291fc7453df7881a970716f8256273aca5747 |
| Linux/Linuxgeneric | 5.13 | Not reported |
| Siemens/SIMATIC CN 4100generic | >=0 <V5.0 | V5.0 |
Published upstream
Sep 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: fix race with concurrent opens in rename(2) Besides sending the rename request to the server, the rename process also involves closing any deferred close, waiting for outstanding I/O to complete as well as marking all existing open handles as deleted to prevent them from deferring closes, which increases the race window for potential concurrent opens on the target file. Fix this by unhashing the dentry in advance to prevent any concurrent opens on the target.
Quoted source text, attributed separately from HOL analysis.