Answer in brief
CVE-2024-47809 records a Medium severity (CVSS 5.5) vulnerability in dlm: fix possible lkb_resource null dereference. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (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-2024-47809 records a Medium severity (CVSS 5.5) vulnerability in dlm: fix possible lkb_resource null dereference. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (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.
CVSS is 5.5. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (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 | >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <e1ffea6bec96d4349dbfcc42ad3e436259f64243 || >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <8d55ce46dd543c6965970ce70c22c3076dd35b1e || >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <6fbdc3980b70e9c1c86eccea7d5ee68108008fa7 || >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <2db11504ef82a60c1a2063ba7431a5cd013ecfcb || >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <b98333c67daf887c724cd692e88e2db9418c0861 | e1ffea6bec96d4349dbfcc42ad3e436259f64243, 8d55ce46dd543c6965970ce70c22c3076dd35b1e, 6fbdc3980b70e9c1c86eccea7d5ee68108008fa7, 2db11504ef82a60c1a2063ba7431a5cd013ecfcb, b98333c67daf887c724cd692e88e2db9418c0861 |
| Linux/Linuxgeneric | 2.6.30 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jan 11, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: dlm: fix possible lkb_resource null dereference This patch fixes a possible null pointer dereference when this function is called from request_lock() as lkb->lkb_resource is not assigned yet, only after validate_lock_args() by calling attach_lkb(). Another issue is that a resource name could be a non printable bytearray and we cannot assume to be ASCII coded. The log functionality is probably never being hit when DLM is used in normal way and no debug logging is enabled. The null pointer dereference can only occur on a new created lkb that does not have the resource assigned yet, it probably never hits the null pointer dereference but we should be sure that other changes might not change this behaviour and we actually can hit the mentioned null pointer dereference. In this patch we just drop the printout of the resource name, the lkb id is enough to make a possible connection to a resource name if this exists.
Quoted source text, attributed separately from HOL analysis.
CVSS is 5.5. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (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 | >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <e1ffea6bec96d4349dbfcc42ad3e436259f64243 || >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <8d55ce46dd543c6965970ce70c22c3076dd35b1e || >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <6fbdc3980b70e9c1c86eccea7d5ee68108008fa7 || >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <2db11504ef82a60c1a2063ba7431a5cd013ecfcb || >=43279e5376017c40b4be9af5bc79cbb4ef6f53d7 <b98333c67daf887c724cd692e88e2db9418c0861 | e1ffea6bec96d4349dbfcc42ad3e436259f64243, 8d55ce46dd543c6965970ce70c22c3076dd35b1e, 6fbdc3980b70e9c1c86eccea7d5ee68108008fa7, 2db11504ef82a60c1a2063ba7431a5cd013ecfcb, b98333c67daf887c724cd692e88e2db9418c0861 |
| Linux/Linuxgeneric | 2.6.30 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jan 11, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: dlm: fix possible lkb_resource null dereference This patch fixes a possible null pointer dereference when this function is called from request_lock() as lkb->lkb_resource is not assigned yet, only after validate_lock_args() by calling attach_lkb(). Another issue is that a resource name could be a non printable bytearray and we cannot assume to be ASCII coded. The log functionality is probably never being hit when DLM is used in normal way and no debug logging is enabled. The null pointer dereference can only occur on a new created lkb that does not have the resource assigned yet, it probably never hits the null pointer dereference but we should be sure that other changes might not change this behaviour and we actually can hit the mentioned null pointer dereference. In this patch we just drop the printout of the resource name, the lkb id is enough to make a possible connection to a resource name if this exists.
Quoted source text, attributed separately from HOL analysis.