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CVE-2026-64448 smb: client: restrict implied bcc[0] exemption to responses without data area

🗓️ 25 Jul 2026 08:51:18Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

In the Linux kernel, the following vulnerability has been resolved: smb: client: restrict implied bcc[0] exemption to responses without data area smb2_check_message() has a long-standing quirk that accepts a responsewhose calculated length is one ...

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-64448
25 Jul 202608:51
attackerkb
CVE
CVE-2026-64448
25 Jul 202608:51
cve
Debian CVE
CVE-2026-64448
25 Jul 202608:51
debiancve
EUVD
EUVD-2026-48792
25 Jul 202608:51
euvd
NVD
CVE-2026-64448
25 Jul 202610:17
nvd
OSV
DEBIAN-CVE-2026-64448
25 Jul 202616:48
osv
Positive Technologies
PT-2026-64669
25 Jul 202600:00
ptsecurity
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/client/smb2misc.c"
    ],
    "versions": [
      {
        "version": "093b2bdad3221e3fae3c26d89387e7297a157664",
        "lessThan": "8d0bbc78046d264bbf6a574ea6f9072258a43e35",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "093b2bdad3221e3fae3c26d89387e7297a157664",
        "lessThan": "b6a381c01e2ac98a48e32ac0f2a45bbadd9e26b0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "093b2bdad3221e3fae3c26d89387e7297a157664",
        "lessThan": "31c6312608c60b72a1feb99a5afb680645a3e8a3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "093b2bdad3221e3fae3c26d89387e7297a157664",
        "lessThan": "573e502d14714d2947e22e7eff40ec20a6a44a42",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "093b2bdad3221e3fae3c26d89387e7297a157664",
        "lessThan": "419ec1b604d7fb60c10aec2dc062371f9fcd4940",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "093b2bdad3221e3fae3c26d89387e7297a157664",
        "lessThan": "ceb875a375dedbf51c9425c1d13a2d7a8435c08c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "093b2bdad3221e3fae3c26d89387e7297a157664",
        "lessThan": "6e9d10f62773b99bd927940fd9cbdfe7207e23ff",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "093b2bdad3221e3fae3c26d89387e7297a157664",
        "lessThan": "53b7c271f06be4dd5cfc8c6ef552a8355c891a7f",
        "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/smb2misc.c"
    ],
    "versions": [
      {
        "version": "3.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.6",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.261",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.212",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.178",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.96",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.39",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.4",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc3",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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25 Jul 2026 08:51Current
EPSS0.0022
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