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CVE-2026-46023 (GCVE-0-2026-46023)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-06-14 17:48
VLAI
Title
dm mirror: fix integer overflow in create_dirty_log()
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e5e0ae3237584ebef510366c4cb3d5cc7c22b610 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 249c831183fb806c8e3b14c7c4c1d2fb68cf37fb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ae59b3025609d5a0a39cf5b2b94e2467f6231573 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 35f6b3281efd44d19110574663bc17a610bc73b9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 47dad9eea75d33212d3d2cea10e7ed6a1bfc0713 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 87c99a50e0fdc68a5b9b52a94d49452cd3ff02ca (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 17a08791d428885d00e510864283a7b839792368 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4c788c6f921b22f9b6c3f316c4a071c05683e7de (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Since argc \u003e= 2 is already guaranteed, the subtraction 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T06:45:33+00:00",
      "cve": "CVE-2026-46023",
      "id": "CVE-2026-46023",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dm mirror: fix integer overflow in create_dirty_log()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46023.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:13:19Z",
      "cve": "CVE-2026-46023",
      "id": "CVE-2026-46023",
      "initial_release_date": "2026-05-28T03:54:12Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "649",
      "product_status:recommended": "277",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46023",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46023.json",
      "version": "15"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.