CVE-2026-45972

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0	Patch
https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81	Patch
https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151	Patch
https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74	Patch
https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73	Patch
https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda	Patch
https://access.redhat.com/security/cve/CVE-2026-45972
https://bugzilla.redhat.com/show_bug.cgi?id=2481973
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.19:-::::::

History

No history.

Information

Published : 2026-05-27 14:17

Updated : 2026-07-15 02:22

NVD link : CVE-2026-45972

Mitre link : CVE-2026-45972

CVE.ORG link : CVE-2026-45972

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

CWE-825

Expired Pointer Dereference

{"id": "CVE-2026-45972", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.0, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.0}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "743f70406264348c0830f38409eb6c40a42fb2db", "lessThan": "96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74", "versionType": "git"}, {"status": "affected", "version": "3a6d6b332f92990958602c1e35ce0173e2dd62e9", "lessThan": "7425453ea16dbc3bbb0f6cac4d60b537e5e4d151", "versionType": "git"}, {"status": "affected", "version": "b64e3b5d8d759dd4333992e4ba4dadf9359952c8", "lessThan": "4d339b219004869e96c4ce56b8891f83a38da4c0", "versionType": "git"}, {"status": "affected", "version": "9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5", "lessThan": "e66dcf7bb9c4df5582c82bc3582725abcbfbea73", "versionType": "git"}, {"status": "affected", "version": "e3a43633023e3cacaca60d4b8972d084a2b06236", "lessThan": "639deb962986ef2f5e2a6d5a600c66f922471e81", "versionType": "git"}, {"status": "affected", "version": "e3a43633023e3cacaca60d4b8972d084a2b06236", "lessThan": "ebbbc4bfad4cb355d17c671223d0814ee3ef4eda", "versionType": "git"}, {"status": "affected", "version": "6.1.163", "lessThan": "6.1.165", "versionType": "semver"}, {"status": "affected", "version": "6.6.124", "lessThan": "6.6.128", "versionType": "semver"}, {"status": "affected", "version": "6.12.70", "lessThan": "6.12.75", "versionType": "semver"}, {"status": "affected", "version": "6.18.10", "lessThan": "6.18.14", "versionType": "semver"}], "programFiles": ["fs/smb/client/smb2file.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"status": "unaffected", "version": "0", "lessThan": "6.19", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.165", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.128", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.75", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.14", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.4", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/smb/client/smb2file.c"], "defaultStatus": "affected"}]}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "affectedData": [{"cpes": ["cpe:/o:redhat:enterprise_linux:10"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "packageName": "kernel", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:6"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "packageName": "kernel", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:7"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "packageName": "kernel", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:7"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "packageName": "kernel-rt", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "kernel", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:8"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "packageName": "kernel-rt", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "kernel", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:9"], "vendor": "Red Hat", "product": "Red Hat Enterprise Linux 9", "packageName": "kernel-rt", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "affected"}]}], "published": "2026-05-27T14:17:14.173", "references": [{"url": "https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-45972", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481973", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-825"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential UAF and double free in smb2_open_file()\n\nZero out @err_iov and @err_buftype before retrying SMB2_open() to\nprevent an UAF bug if @data != NULL, otherwise a double free."}], "lastModified": "2026-07-15T02:22:08.177", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F2E6F672-99A5-4539-9312-ED9E5727E1C1", "versionEndExcluding": "6.1.165", "versionStartIncluding": "6.1.163"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5A13D8A0-4650-4291-B232-D6A29EB529EA", "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.6.124"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8A635070-FE03-4A8C-B47E-AD467AF0ECB5", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.12.70"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "35A89BC7-E31E-4DDF-A921-3EDD7EB77120", "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.18.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "411B9362-5B74-4569-8450-50CAD50DE99C", "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.19.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "35C8A871-4971-433E-A046-FC9F7B7D190A"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}