CVE-2026-97561

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97561", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.155Z", "datePublished": "2026-09-25T10:21:50.067Z", "dateUpdated": "2026-10-30T12:37:25.329Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:37:25.329Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: honor forceuid/forcegid when mapping SIDs to uid/gid\n\nWhen the administrator mounts with forceuid or forcegid (uid=/gid=\nmount options), they expect all files to appear owned by the specified\nuser/group. However, several code paths unconditionally called\nsid_to_id() to overwrite cf_uid/cf_gid with server-provided values,\nignoring the administrator's explicit override:\n\n - smb311_posix_info_to_fattr() (stat via POSIX extensions)\n - cifs_posix_to_fattr() (readdir via POSIX extensions)\n - parse_sec_desc() (CIFS ACL ownership mapping)\n\nThis allowed an untrusted server to dictate local file ownership even\nwhen the mount was configured to force specific uid/gid values.\n\nFix all three call sites to check CIFS_MOUNT_OVERR_UID and\nCIFS_MOUNT_OVERR_GID before calling sid_to_id(), following the\nsame pattern already used by cifs_unix_basic_to_fattr() for unix\nextensions."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/cifsacl.c", "fs/smb/client/inode.c", "fs/smb/client/readdir.c"], "versions": [{"version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "lessThan": "89a3b4704af2208e381c55037ff2d1e2365b83e4", "status": "affected", "versionType": "git"}, {"version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "lessThan": "be6eccccec867c22d7c65fab4ea4e91ec3d5b8c6", "status": "affected", "versionType": "git"}, {"version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "lessThan": "bc35de451c128d399ad185d6269f8847e97cd1c9", "status": "affected", "versionType": "git"}, {"version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "lessThan": "6ac7a29691558bed18e2df1780636b8aa0fd13d5", "status": "affected", "versionType": "git"}, {"version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "lessThan": "e1b74f8f8c1d13190b09fe623b729d36b7ac22a8", "status": "affected", "versionType": "git"}, {"version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "lessThan": "18a72975e9f35aadecc75b031f693f2d1f49308f", "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/cifsacl.c", "fs/smb/client/inode.c", "fs/smb/client/readdir.c"], "versions": [{"version": "3.0", "status": "affected"}, {"version": "0", "lessThan": "3.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/89a3b4704af2208e381c55037ff2d1e2365b83e4"}, {"url": "https://git.kernel.org/stable/c/be6eccccec867c22d7c65fab4ea4e91ec3d5b8c6"}, {"url": "https://git.kernel.org/stable/c/bc35de451c128d399ad185d6269f8847e97cd1c9"}, {"url": "https://git.kernel.org/stable/c/6ac7a29691558bed18e2df1780636b8aa0fd13d5"}, {"url": "https://git.kernel.org/stable/c/e1b74f8f8c1d13190b09fe623b729d36b7ac22a8"}, {"url": "https://git.kernel.org/stable/c/18a72975e9f35aadecc75b031f693f2d1f49308f"}], "title": "smb: client: honor forceuid/forcegid when mapping SIDs to uid/gid", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/cifsacl.c", "fs/smb/client/inode.c", "fs/smb/client/readdir.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "89a3b4704af2208e381c55037ff2d1e2365b83e4", "status": "affected", "version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "versionType": "git"}, {"lessThan": "be6eccccec867c22d7c65fab4ea4e91ec3d5b8c6", "status": "affected", "version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "versionType": "git"}, {"lessThan": "bc35de451c128d399ad185d6269f8847e97cd1c9", "status": "affected", "version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "versionType": "git"}, {"lessThan": "6ac7a29691558bed18e2df1780636b8aa0fd13d5", "status": "affected", "version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "versionType": "git"}, {"lessThan": "e1b74f8f8c1d13190b09fe623b729d36b7ac22a8", "status": "affected", "version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "versionType": "git"}, {"lessThan": "18a72975e9f35aadecc75b031f693f2d1f49308f", "status": "affected", "version": "9409ae58e0759d010b347e7b19ebc90ab5d4b98f", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/cifsacl.c", "fs/smb/client/inode.c", "fs/smb/client/readdir.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.0"}, {"lessThan": "3.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: honor forceuid/forcegid when mapping SIDs to uid/gid\n\nWhen the administrator mounts with forceuid or forcegid (uid=/gid=\nmount options), they expect all files to appear owned by the specified\nuser/group. However, several code paths unconditionally called\nsid_to_id() to overwrite cf_uid/cf_gid with server-provided values,\nignoring the administrator's explicit override:\n\n - smb311_posix_info_to_fattr() (stat via POSIX extensions)\n - cifs_posix_to_fattr() (readdir via POSIX extensions)\n - parse_sec_desc() (CIFS ACL ownership mapping)\n\nThis allowed an untrusted server to dictate local file ownership even\nwhen the mount was configured to force specific uid/gid values.\n\nFix all three call sites to check CIFS_MOUNT_OVERR_UID and\nCIFS_MOUNT_OVERR_GID before calling sid_to_id(), following the\nsame pattern already used by cifs_unix_basic_to_fattr() for unix\nextensions."}], "id": "CVE-2026-97561", "lastModified": "2026-10-30T13:21:08.230", "metrics": {}, "published": "2026-09-25T11:17:06.657", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/18a72975e9f35aadecc75b031f693f2d1f49308f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ac7a29691558bed18e2df1780636b8aa0fd13d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89a3b4704af2208e381c55037ff2d1e2365b83e4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc35de451c128d399ad185d6269f8847e97cd1c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/be6eccccec867c22d7c65fab4ea4e91ec3d5b8c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e1b74f8f8c1d13190b09fe623b729d36b7ac22a8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: smb: client: honor forceuid/forcegid when mapping SIDs to uid/gid", "id": "2541172", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541172"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-708", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsmb: client: honor forceuid/forcegid when mapping SIDs to uid/gid\nWhen the administrator mounts with forceuid or forcegid (uid=/gid=\nmount options), they expect all files to appear owned by the specified\nuser/group. However, several code paths unconditionally called\nsid_to_id() to overwrite cf_uid/cf_gid with server-provided values,\nignoring the administrator's explicit override:\n- smb311_posix_info_to_fattr() (stat via POSIX extensions)\n- cifs_posix_to_fattr() (readdir via POSIX extensions)\n- parse_sec_desc() (CIFS ACL ownership mapping)\nThis allowed an untrusted server to dictate local file ownership even\nwhen the mount was configured to force specific uid/gid values.\nFix all three call sites to check CIFS_MOUNT_OVERR_UID and\nCIFS_MOUNT_OVERR_GID before calling sid_to_id(), following the\nsame pattern already used by cifs_unix_basic_to_fattr() for unix\nextensions.", "A flaw was found in the Linux kernel's Server Message Block (SMB) client. When an administrator mounts a remote share with options configured to force specific local user and group ownership, the client fails to enforce these restrictions and instead accepts ownership values provided by the remote server. A malicious or untrusted SMB server can exploit this flaw during file or directory lookups to dictate local file ownership, potentially bypassing local access controls and leading to unauthorized access."], "name": "CVE-2026-97561", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97561\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97561\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97561.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e1b74f8f8c1d13190b09fe623b729d36b7ac22a8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,18a72975e9f35aadecc75b031f693f2d1f49308f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,7.2.7)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-25T17:15:14.753455+00:00", "updated": "2026-10-01T11:00:06.072605+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}