CVE-2023-54076

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix missed ses refcounting Use new cifs_smb_ses_inc_refcount() helper to get an active reference of @ses and @ses->dfs_root_ses (if set). This will prevent @ses->dfs_root_ses of being put in the next call to cifs_put_smb_ses() and thus potentially causing an use-after-free bug.

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/bf99f6be2d20146942bce6f9e90a0ceef12cbc1e
https://git.kernel.org/stable/c/eb382196e6f6e05cfafdab797840e5a96c6e7bf0

Configurations

No configuration.

History

No history.

Information

Published : 2025-12-24 13:16

Updated : 2026-08-04 10:19

NVD link : CVE-2023-54076

Mitre link : CVE-2023-54076

CVE.ORG link : CVE-2023-54076

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2023-54076", "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}]}, "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": "8e3554150d6c80a84b3cb046615d1a0e943811dc", "lessThan": "eb382196e6f6e05cfafdab797840e5a96c6e7bf0", "versionType": "git"}, {"status": "affected", "version": "8e3554150d6c80a84b3cb046615d1a0e943811dc", "lessThan": "bf99f6be2d20146942bce6f9e90a0ceef12cbc1e", "versionType": "git"}, {"status": "affected", "version": "f30d226bcc9f0e2d97b4a6e94c43a28148fbeab6", "versionType": "git"}, {"status": "affected", "version": "c082c3be0f96e759ff2e361d929832fda0b93851", "versionType": "git"}, {"status": "affected", "version": "6.2.15", "lessThan": "6.3", "versionType": "semver"}, {"status": "affected", "version": "6.3.2", "lessThan": "6.4", "versionType": "semver"}], "programFiles": ["fs/smb/client/dfs.c", "fs/smb/client/smb2transport.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"status": "unaffected", "version": "0", "lessThan": "6.4", "versionType": "semver"}, {"status": "unaffected", "version": "6.4.7", "versionType": "semver", "lessThanOrEqual": "6.4.*"}, {"status": "unaffected", "version": "6.5", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/smb/client/dfs.c", "fs/smb/client/smb2transport.c"], "defaultStatus": "affected"}]}], "published": "2025-12-24T13:16:09.447", "references": [{"url": "https://git.kernel.org/stable/c/bf99f6be2d20146942bce6f9e90a0ceef12cbc1e", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/eb382196e6f6e05cfafdab797840e5a96c6e7bf0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Deferred", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix missed ses refcounting\n\nUse new cifs_smb_ses_inc_refcount() helper to get an active reference\nof @ses and @ses->dfs_root_ses (if set). This will prevent\n@ses->dfs_root_ses of being put in the next call to cifs_put_smb_ses()\nand thus potentially causing an use-after-free bug."}], "lastModified": "2026-08-04T10:19:27.750", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}