CVE-2026-46023
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.
Does this matter?
Lower severity and a low EPSS score (0.13%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-190
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/17a08791d428885d00e510864283a7b839792368Patch
- https://git.kernel.org/stable/c/249c831183fb806c8e3b14c7c4c1d2fb68cf37fbPatch
- https://git.kernel.org/stable/c/35f6b3281efd44d19110574663bc17a610bc73b9Patch
- https://git.kernel.org/stable/c/47dad9eea75d33212d3d2cea10e7ed6a1bfc0713Patch
- https://git.kernel.org/stable/c/4c788c6f921b22f9b6c3f316c4a071c05683e7dePatch
- https://git.kernel.org/stable/c/87c99a50e0fdc68a5b9b52a94d49452cd3ff02caPatch
- https://git.kernel.org/stable/c/ae59b3025609d5a0a39cf5b2b94e2467f6231573Patch
- https://git.kernel.org/stable/c/e5e0ae3237584ebef510366c4cb3d5cc7c22b610Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.