Answer in brief
CVE-2026-46023 records a Unknown severity vulnerability in dm mirror: fix integer overflow in create_dirty_log(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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 S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e5e0ae3237584ebef510366c4cb3d5cc7c22b610 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <249c831183fb806c8e3b14c7c4c1d2fb68cf37fb || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ae59b3025609d5a0a39cf5b2b94e2467f6231573 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <35f6b3281efd44d19110574663bc17a610bc73b9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47dad9eea75d33212d3d2cea10e7ed6a1bfc0713 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <87c99a50e0fdc68a5b9b52a94d49452cd3ff02ca || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <17a08791d428885d00e510864283a7b839792368 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c788c6f921b22f9b6c3f316c4a071c05683e7de | e5e0ae3237584ebef510366c4cb3d5cc7c22b610, 249c831183fb806c8e3b14c7c4c1d2fb68cf37fb, ae59b3025609d5a0a39cf5b2b94e2467f6231573, 35f6b3281efd44d19110574663bc17a610bc73b9, 47dad9eea75d33212d3d2cea10e7ed6a1bfc0713, 87c99a50e0fdc68a5b9b52a94d49452cd3ff02ca, 17a08791d428885d00e510864283a7b839792368, 4c788c6f921b22f9b6c3f316c4a071c05683e7de |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: dm mirror: fix integer overflow in create_dirty_log() The argument count calculation in create_dirty_log() performs `*args_used = 2 + param_count` before validating against argc. When a user provides a param_count close to UINT_MAX via the device mapper table string, this unsigned addition wraps around to a small value, causing the subsequent `argc < *args_used` check to be bypassed. The overflowed param_count is then passed as argc to dm_dirty_log_create(), where it can cause out-of-bounds reads on the argv array. Fix by comparing param_count against argc - 2 before performing the addition, following the same pattern used by parse_features() in the same file. Since argc >= 2 is already guaranteed, the subtraction is safe.
Quoted source text, attributed separately from HOL analysis.