Answer in brief
CVE-2025-39689 records a Unknown severity vulnerability in ftrace: Also allocate and copy hash for reading of filter files. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. 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-2025-39689 records a Unknown severity vulnerability in ftrace: Also allocate and copy hash for reading of filter files. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c20489dad156dd9919ebd854bbace46dbd2576a3 <12064e1880fc9202be75ff668205b1703d92f74f || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <c4cd93811e038d19f961985735ef7bb128078dfb || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <e0b6b223167e1edde5c82edf38e393c06eda1f13 || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <a40c69f4f1ed96acbcd62e9b5ff3a596f0a91309 || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <3b114a3282ab1a12cb4618a8f45db5d7185e784a || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <c591ba1acd081d4980713e47869dd1cc3d963d19 || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <64db338140d2bad99a0a8c6a118dd60b3e1fb8cb || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <bfb336cf97df7b37b2b2edec0f69773e06d11955 | 12064e1880fc9202be75ff668205b1703d92f74f, c4cd93811e038d19f961985735ef7bb128078dfb, e0b6b223167e1edde5c82edf38e393c06eda1f13, a40c69f4f1ed96acbcd62e9b5ff3a596f0a91309, 3b114a3282ab1a12cb4618a8f45db5d7185e784a, c591ba1acd081d4980713e47869dd1cc3d963d19, 64db338140d2bad99a0a8c6a118dd60b3e1fb8cb, bfb336cf97df7b37b2b2edec0f69773e06d11955 |
| Linux/Linuxgeneric | 4.12 | Not reported |
| Siemens/SIMATIC CN 4100generic | >=0 <V5.0 | V5.0 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Sep 5, 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: ftrace: Also allocate and copy hash for reading of filter files Currently the reader of set_ftrace_filter and set_ftrace_notrace just adds the pointer to the global tracer hash to its iterator. Unlike the writer that allocates a copy of the hash, the reader keeps the pointer to the filter hashes. This is problematic because this pointer is static across function calls that release the locks that can update the global tracer hashes. This can cause UAF and similar bugs. Allocate and copy the hash for reading the filter files like it is done for the writers. This not only fixes UAF bugs, but also makes the code a bit simpler as it doesn't have to differentiate when to free the iterator's hash between writers and readers.
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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c20489dad156dd9919ebd854bbace46dbd2576a3 <12064e1880fc9202be75ff668205b1703d92f74f || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <c4cd93811e038d19f961985735ef7bb128078dfb || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <e0b6b223167e1edde5c82edf38e393c06eda1f13 || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <a40c69f4f1ed96acbcd62e9b5ff3a596f0a91309 || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <3b114a3282ab1a12cb4618a8f45db5d7185e784a || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <c591ba1acd081d4980713e47869dd1cc3d963d19 || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <64db338140d2bad99a0a8c6a118dd60b3e1fb8cb || >=c20489dad156dd9919ebd854bbace46dbd2576a3 <bfb336cf97df7b37b2b2edec0f69773e06d11955 | 12064e1880fc9202be75ff668205b1703d92f74f, c4cd93811e038d19f961985735ef7bb128078dfb, e0b6b223167e1edde5c82edf38e393c06eda1f13, a40c69f4f1ed96acbcd62e9b5ff3a596f0a91309, 3b114a3282ab1a12cb4618a8f45db5d7185e784a, c591ba1acd081d4980713e47869dd1cc3d963d19, 64db338140d2bad99a0a8c6a118dd60b3e1fb8cb, bfb336cf97df7b37b2b2edec0f69773e06d11955 |
| Linux/Linuxgeneric | 4.12 | Not reported |
| Siemens/SIMATIC CN 4100generic | >=0 <V5.0 | V5.0 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Sep 5, 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: ftrace: Also allocate and copy hash for reading of filter files Currently the reader of set_ftrace_filter and set_ftrace_notrace just adds the pointer to the global tracer hash to its iterator. Unlike the writer that allocates a copy of the hash, the reader keeps the pointer to the filter hashes. This is problematic because this pointer is static across function calls that release the locks that can update the global tracer hashes. This can cause UAF and similar bugs. Allocate and copy the hash for reading the filter files like it is done for the writers. This not only fixes UAF bugs, but also makes the code a bit simpler as it doesn't have to differentiate when to free the iterator's hash between writers and readers.
Quoted source text, attributed separately from HOL analysis.