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CVE-2026-89637 smb: client: fix UAF and buffer leak in cifs_check_trans2() for malformed secondary T2

🗓️ 11 Sep 2026 19:45:31Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 35 Views

UAF and buffer leak in Linux kernel SMB client via malformed secondary TRANSACT2 response.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-89637
12 Sep 202616:13
–circl
cve
CVE
CVE-2026-89637
11 Sep 202619:45
–cve
debiancve
Debian CVE
CVE-2026-89637
11 Sep 202619:45
–debiancve
euvd
EUVD
EUVD-2026-76549
11 Sep 202619:45
–euvd
mscve
Microsoft CVE
smb: client: fix UAF and buffer leak in cifs_check_trans2() for malformed secondary T2
13 Sep 202608:02
–mscve
nvd
NVD
CVE-2026-89637
11 Sep 202620:19
–nvd
osv
OSV
AZL-100694 CVE-2026-89637 affecting package kernel 6.6.150.1-1
11 Sep 202620:19
–osv
osv
OSV
BELL-CVE-2026-89637
15 Sep 202606:05
–osv
osv
OSV
DEBIAN-CVE-2026-89637
11 Sep 202620:19
–osv
osv
OSV
OESA-2026-4039 kernel security update
25 Sep 202601:27
–osv
Rows per page
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/client/smb1transport.c"
    ],
    "versions": [
      {
        "version": "316cf94a910f6f93d43cc574359d163ccae098a3",
        "lessThan": "9eed72e9534b10a6d9f8f5146feff3db53aebdba",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "316cf94a910f6f93d43cc574359d163ccae098a3",
        "lessThan": "5e6533a683f6a851158d9f33fb4ea8f4f25d7f84",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "316cf94a910f6f93d43cc574359d163ccae098a3",
        "lessThan": "730d0bb19507b9e19c2fe5343109ac618e2fbce5",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/client/smb1transport.c"
    ],
    "versions": [
      {
        "version": "3.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.6",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.51",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.4",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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