CVE-2026-43125 (GCVE-0-2026-43125)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-08-05 12:26
VLAI
Title
dlm: validate length in dlm_search_rsb_tree
Summary
In the Linux kernel, the following vulnerability has been resolved: dlm: validate length in dlm_search_rsb_tree The len parameter in dlm_dump_rsb_name() is not validated and comes from network messages. When it exceeds DLM_RESNAME_MAXLEN, it can cause out-of-bounds write in dlm_search_rsb_tree(). Add length validation to prevent potential buffer overflow.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-130 - Improper Handling of Length Parameter Inconsistency
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7210cb7a72a22303cdb225bd1aea28697a17bbae , < 67288113c5e6cf9e659b4065c0ed6f16100e0c71 (git)
Affected: 7210cb7a72a22303cdb225bd1aea28697a17bbae , < 082083c9fbd99422a0370fe2102144a231c9f5d6 (git)
Affected: 7210cb7a72a22303cdb225bd1aea28697a17bbae , < 5f053a2e7209d326cbbc07738fa6d6893d307438 (git)
Affected: 7210cb7a72a22303cdb225bd1aea28697a17bbae , < 080e5563f878c64e697b89e7439d730d0daad882 (git)
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Linux Linux Affected: 3.4
Unaffected: 0 , < 3.4 (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:3.10.0-1160.155.1.rt56.1307.el7 , < * (rpm)
    cpe:/a:redhat:rhel_extras_rt_els:7
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Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:3.10.0-1160.154.1.el7 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-553.132.1.rt7.473.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::nfv
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.18.0-553.132.1.el8_10 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:4.18.0-372.198.1.el8_6 , < * (rpm)
    cpe:/o:redhat:rhel_aus:8.6
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Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:4.18.0-372.198.1.el8_6 , < * (rpm)
    cpe:/o:redhat:rhel_eus_long_life:8.6
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Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:4.18.0-477.150.1.el8_8 , < * (rpm)
    cpe:/o:redhat:rhel_tus:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:4.18.0-477.150.1.el8_8 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.8
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:5.14.0-687.15.1.el9_8 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
    cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:5.14.0-284.178.1.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:5.14.0-284.178.1.rt14.463.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::nfv
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Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:5.14.0-427.136.1.el9_4 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4
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Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:5.14.0-570.125.1.el9_6 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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      "source": "Microsoft CSAF VEX",
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      "title": "dlm: validate length in dlm_search_rsb_tree",
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      "version": "8"
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    "redhat_vex": {
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      "cve": "CVE-2026-43125",
      "id": "CVE-2026-43125",
      "initial_release_date": "2026-05-06T00:00:00+00:00",
      "product_status:fixed": "1419",
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      "product_status:under_investigation": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dlm: validate length in dlm_search_rsb_tree",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43125.json",
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      "product_status:recommended": "74",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43125",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43125.json",
      "version": "6"
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  }
}



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Tags
Taxonomy of the tags.





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.