CVE-2026-64380 smb: client: harden POSIX SID length parsing

🗓️ 25 Jul 2026 08:50:30Reported by LinuxType

In the Linux kernel, the following vulnerability has been resolved: smb: client: harden POSIX SID length parsing posix_info_sid_size() reads sid[1] to obtain the subauthority count,but its existing boundary check still accepts buffers with only on...

Reporter	Title	Published	Views	Family All 10
Circl	CVE-2026-64380	25 Jul 202616:16	–	circl
CVE	CVE-2026-64380	25 Jul 202608:50	–	cve
Debian CVE	CVE-2026-64380	25 Jul 202608:50	–	debiancve
EUVD	EUVD-2026-48924	25 Jul 202608:50	–	euvd
NVD	CVE-2026-64380	25 Jul 202610:17	–	nvd
OSV	DEBIAN-CVE-2026-64380	25 Jul 202616:48	–	osv
OSV	ECHO-46D9-F43A-CC47	26 Jul 202602:26	–	osv
Positive Technologies	PT-2026-64601	25 Jul 202600:00	–	ptsecurity
SUSE CVE	SUSE CVE-2026-64380	25 Jul 202616:00	–	susecve
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2026-64380	25 Jul 202600:00	–	nessus

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/smb/client/smb2pdu.c"
    ],
    "versions": [
      {
        "version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
        "lessThan": "171605aed68380c2fa75dff9b3a1ed427c50065b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
        "lessThan": "4213c1208978483021d7d125c131de3985d38f61",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
        "lessThan": "96e889bc1e759c83f25093e8c2f3da31b4973f30",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
        "lessThan": "0de5b8e76847f5de26f364a82c6602c4881c30da",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
        "lessThan": "427eb7eb46425fec845a43e861f3d6e2899cae59",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
        "lessThan": "86c5d470f5d42e61123b2f4b4f0b91f4eee5b980",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
        "lessThan": "46a84715a015cb48e1b9c219dc88c03d8a541ea4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "349e13ad30b45998bb9937cfe0b32be6f951976d",
        "lessThan": "7ad2bcf2441430bb2e918fb3ef9a90d775a6e422",
        "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/smb2pdu.c"
    ],
    "versions": [
      {
        "version": "5.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.7",
        "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-rc2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/46a84715a015cb48e1b9c219dc88c03d8a541ea4
git	www.git.kernel.org/stable/c/4213c1208978483021d7d125c131de3985d38f61
git	www.git.kernel.org/stable/c/171605aed68380c2fa75dff9b3a1ed427c50065b
git	www.git.kernel.org/stable/c/96e889bc1e759c83f25093e8c2f3da31b4973f30
git	www.git.kernel.org/stable/c/0de5b8e76847f5de26f364a82c6602c4881c30da
git	www.git.kernel.org/stable/c/7ad2bcf2441430bb2e918fb3ef9a90d775a6e422
git	www.git.kernel.org/stable/c/86c5d470f5d42e61123b2f4b4f0b91f4eee5b980
git	www.git.kernel.org/stable/c/427eb7eb46425fec845a43e861f3d6e2899cae59

25 Jul 2026 08:50Current

EPSS0.0022