CVE-2026-46023 Details
Description
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.
An integer overflow vulnerability has been identified in the Linux kernel's device mapper mirror component, specifically within the 'create_dirty_log()' function. This issue arises because the function calculates the argument count by adding '2' to 'param_count' before validating it against 'argc'. When 'param_count' is set close to UINT_MAX, this addition wraps around, creating a small value that bypasses the subsequent check. The overflowed 'param_count' is then used as 'argc' in 'dm_dirty_log_create()', leading to out-of-bounds reads from the 'argv' array. The vulnerability has been addressed by adjusting the comparison of 'param_count' against 'argc - 2' before performing the addition, a method consistent with the parsing of features in the same file.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for upgrading the kernel can be found in the official Linux kernel documentation.
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CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/17a08791d428885d00e510864283a7b839792368 | kernel.org | Patch |
| https://git.kernel.org/stable/c/249c831183fb806c8e3b14c7c4c1d2fb68cf37fb | kernel.org | Patch |
| https://git.kernel.org/stable/c/35f6b3281efd44d19110574663bc17a610bc73b9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/47dad9eea75d33212d3d2cea10e7ed6a1bfc0713 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4c788c6f921b22f9b6c3f316c4a071c05683e7de | kernel.org | Patch |
| https://git.kernel.org/stable/c/87c99a50e0fdc68a5b9b52a94d49452cd3ff02ca | kernel.org | Patch |
| https://git.kernel.org/stable/c/ae59b3025609d5a0a39cf5b2b94e2467f6231573 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e5e0ae3237584ebef510366c4cb3d5cc7c22b610 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-190 | Integer Overflow or Wraparound | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.12.1, < 5.10.258 >= 5.11, < 5.15.209 >= 5.16, < 6.1.175 >= 6.2, < 6.6.140 >= 6.7, < 6.12.86 >= 6.13, < 6.18.27 >= 6.19, < 7.0.4 2.6.12 - 2.6.12 rc2 2.6.12 rc3 2.6.12 rc4 2.6.12 rc5 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 16, 2026 | Initial Analysis | [email protected] |
| Jun 1, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |