CVE-2026-45972 (GCVE-0-2026-45972)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:18 – Updated: 2026-08-05 12:28
VLAI
Title
smb: client: fix potential UAF and double free in smb2_open_file()
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.
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-825 - Expired Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 743f70406264348c0830f38409eb6c40a42fb2db , < 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 (git)
Affected: 3a6d6b332f92990958602c1e35ce0173e2dd62e9 , < 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 (git)
Affected: b64e3b5d8d759dd4333992e4ba4dadf9359952c8 , < 4d339b219004869e96c4ce56b8891f83a38da4c0 (git)
Affected: 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 , < e66dcf7bb9c4df5582c82bc3582725abcbfbea73 (git)
Affected: e3a43633023e3cacaca60d4b8972d084a2b06236 , < 639deb962986ef2f5e2a6d5a600c66f922471e81 (git)
Affected: e3a43633023e3cacaca60d4b8972d084a2b06236 , < ebbbc4bfad4cb355d17c671223d0814ee3ef4eda (git)
Affected: 6.1.163 , < 6.1.165 (semver)
Affected: 6.6.124 , < 6.6.128 (semver)
Affected: 6.12.70 , < 6.12.75 (semver)
Affected: 6.18.10 , < 6.18.14 (semver)
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Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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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 7     cpe:/o:redhat:enterprise_linux:7
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-06-30T03:46:40+00:00",
      "cve": "CVE-2026-45972",
      "id": "CVE-2026-45972",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: smb: client: fix potential UAF and double free in smb2_open_file()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-06T01:18:43Z",
      "cve": "CVE-2026-45972",
      "id": "CVE-2026-45972",
      "initial_release_date": "2026-05-28T03:55:10Z",
      "product_status:known_not_affected": "293",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-45972",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45972.json",
      "version": "5"
    }
  }
}



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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.