{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98169", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.322Z", "datePublished": "2026-10-06T08:44:14.339Z", "dateUpdated": "2026-10-07T06:49:19.327Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-07T06:49:19.327Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential OOB read in smb3_enum_snapshots()\n\nIf snapshot_array_size is smaller than GMT_TOKEN_SIZE,\nsmb3_enum_snapshots() sets ret_data_len to\nsizeof(struct smb_snapshot_array) without verifying the actual length\nof the server's reply.\n\nBecause SMB2_ioctl() places no lower bound on the server-supplied\nOutputCount and allocates retbuf to exactly that length, a short reply\nresults in ret_data_len exceeding the size of retbuf. The subsequent\ncopy_to_user() then reads past the end of retbuf, leaking adjacent slab\nmemory to userspace. The subsequent clamp check is ineffective as it\nonly reduces ret_data_len.\n\nFix this by rejecting replies shorter than\nsizeof(struct smb_snapshot_array) with -EIO. Note that the bound is set\nto the 12-byte struct size rather than the 16-byte\nMIN_SNAPSHOT_ARRAY_SIZE defined in MS-SMB2 3.3.5.15.1, because 12 bytes\nis exactly what copy_to_user() attempts to read."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The bad input is the OutputCount field of the SMB2 IOCTL response to FSCTL_SRV_ENUMERATE_SNAPSHOTS, sent by the SMB server over TCP. SMB2_ioctl() rejects only 0 or oversized values and kmemdup()s 1-11 bytes, and smb3_enum_snapshots() then copies 12 bytes from that buffer.\nAC:L - A server that always answers the snapshot FSCTL with OutputCount 1-11 hits the bug every time a caller passes snapshot_array_size < GMT_TOKEN_SIZE, which is the normal first sizing query. No race or memory layout outside the server's control is needed.\nPR:N - The attacker is the SMB server answering the client's request. It needs no account or privilege on the client to send a short IOCTL response.\nUI:R - A victim has to mount the attacker's share, and a process on the client has to issue ioctl(CIFS_ENUMERATE_SNAPSHOTS) on a file there to make smb3_enum_snapshots() run.\nS:U - The out-of-bounds read and the crash both stay inside the client kernel. No VM, IOMMU or other security boundary is crossed.\nC:L - copy_to_user() reads at most 11 bytes past the kmemdup'd retbuf, from the next kmalloc-8 object or the unused tail of a kmalloc-16 object. The leak is small and fixed in size, and it goes to the ioctl caller, not back over the wire.\nI:N - The defect is a read only: retbuf is copied out to user space, and no kernel memory is written out of bounds.\nA:H - With CONFIG_HARDENED_USERCOPY (common on distro and Android kernels), a 12-byte copy_to_user() from a kmalloc-8 retbuf (OutputCount 1-8) fails the heap object check. usercopy_abort() then calls BUG() and the kernel oopses, or panics if panic_on_oops is set. The server can trigger this on every enumeration."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2ops.c"], "versions": [{"version": "e02789a53d71334b067ad72eee5d4e88a0158083", "lessThan": "15a221c734b9d044ab769e7e3606b2cab96fb65a", "status": "affected", "versionType": "git"}, {"version": "e02789a53d71334b067ad72eee5d4e88a0158083", "lessThan": "74995ee8305a7c4d76ee70d6acd996a75eda3c03", "status": "affected", "versionType": "git"}, {"version": "e02789a53d71334b067ad72eee5d4e88a0158083", "lessThan": "210f0f1f67817e7d2348b86b5115a9b85ef5c98b", "status": "affected", "versionType": "git"}, {"version": "e02789a53d71334b067ad72eee5d4e88a0158083", "lessThan": "1cdf0d304d820fb13bf0faf532c3459600f9ea43", "status": "affected", "versionType": "git"}, {"version": "e02789a53d71334b067ad72eee5d4e88a0158083", "lessThan": "dbe452a905dfe2804647530a9ff3d7e3826ed04d", "status": "affected", "versionType": "git"}, {"version": "e02789a53d71334b067ad72eee5d4e88a0158083", "lessThan": "4775c3b7a597907e0b97556c7986fda238a377ae", "status": "affected", "versionType": "git"}, {"version": "a94703ff8e3647f8a9a3a92a468450299a7b77e9", "status": "affected", "versionType": "git"}, {"version": "82a856f527334ffd69aae26e7dd9e03b19c4a520", "status": "affected", "versionType": "git"}, {"version": "25b981bfe192fd208ba04c81f4aa30ffb5141660", "status": "affected", "versionType": "git"}, {"version": "4.9.125", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.68", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.18.6", "lessThan": "4.19", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2ops.c"], "versions": [{"version": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.8", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc4", "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": "4.19", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.3-rc4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.125"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.68"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/15a221c734b9d044ab769e7e3606b2cab96fb65a"}, {"url": "https://git.kernel.org/stable/c/74995ee8305a7c4d76ee70d6acd996a75eda3c03"}, {"url": "https://git.kernel.org/stable/c/210f0f1f67817e7d2348b86b5115a9b85ef5c98b"}, {"url": "https://git.kernel.org/stable/c/1cdf0d304d820fb13bf0faf532c3459600f9ea43"}, {"url": "https://git.kernel.org/stable/c/dbe452a905dfe2804647530a9ff3d7e3826ed04d"}, {"url": "https://git.kernel.org/stable/c/4775c3b7a597907e0b97556c7986fda238a377ae"}], "title": "smb: client: fix potential OOB read in smb3_enum_snapshots()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "15a221c734b9d044ab769e7e3606b2cab96fb65a", "status": "affected", "version": "e02789a53d71334b067ad72eee5d4e88a0158083", "versionType": "git"}, {"lessThan": "74995ee8305a7c4d76ee70d6acd996a75eda3c03", "status": "affected", "version": "e02789a53d71334b067ad72eee5d4e88a0158083", "versionType": "git"}, {"lessThan": "210f0f1f67817e7d2348b86b5115a9b85ef5c98b", "status": "affected", "version": "e02789a53d71334b067ad72eee5d4e88a0158083", "versionType": "git"}, {"lessThan": "1cdf0d304d820fb13bf0faf532c3459600f9ea43", "status": "affected", "version": "e02789a53d71334b067ad72eee5d4e88a0158083", "versionType": "git"}, {"lessThan": "dbe452a905dfe2804647530a9ff3d7e3826ed04d", "status": "affected", "version": "e02789a53d71334b067ad72eee5d4e88a0158083", "versionType": "git"}, {"lessThan": "4775c3b7a597907e0b97556c7986fda238a377ae", "status": "affected", "version": "e02789a53d71334b067ad72eee5d4e88a0158083", "versionType": "git"}, {"status": "affected", "version": "a94703ff8e3647f8a9a3a92a468450299a7b77e9", "versionType": "git"}, {"status": "affected", "version": "82a856f527334ffd69aae26e7dd9e03b19c4a520", "versionType": "git"}, {"status": "affected", "version": "25b981bfe192fd208ba04c81f4aa30ffb5141660", "versionType": "git"}, {"lessThan": "4.10", "status": "affected", "version": "4.9.125", "versionType": "semver"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.68", "versionType": "semver"}, {"lessThan": "4.19", "status": "affected", "version": "4.18.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.19"}, {"lessThan": "4.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc4", "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: fix potential OOB read in smb3_enum_snapshots()\n\nIf snapshot_array_size is smaller than GMT_TOKEN_SIZE,\nsmb3_enum_snapshots() sets ret_data_len to\nsizeof(struct smb_snapshot_array) without verifying the actual length\nof the server's reply.\n\nBecause SMB2_ioctl() places no lower bound on the server-supplied\nOutputCount and allocates retbuf to exactly that length, a short reply\nresults in ret_data_len exceeding the size of retbuf. The subsequent\ncopy_to_user() then reads past the end of retbuf, leaking adjacent slab\nmemory to userspace. The subsequent clamp check is ineffective as it\nonly reduces ret_data_len.\n\nFix this by rejecting replies shorter than\nsizeof(struct smb_snapshot_array) with -EIO. Note that the bound is set\nto the 12-byte struct size rather than the 16-byte\nMIN_SNAPSHOT_ARRAY_SIZE defined in MS-SMB2 3.3.5.15.1, because 12 bytes\nis exactly what copy_to_user() attempts to read."}], "id": "CVE-2026-98169", "lastModified": "2026-10-07T07:17:03.450", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-06T09:17:58.480", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/15a221c734b9d044ab769e7e3606b2cab96fb65a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1cdf0d304d820fb13bf0faf532c3459600f9ea43"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/210f0f1f67817e7d2348b86b5115a9b85ef5c98b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4775c3b7a597907e0b97556c7986fda238a377ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/74995ee8305a7c4d76ee70d6acd996a75eda3c03"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dbe452a905dfe2804647530a9ff3d7e3826ed04d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: smb: client: fix potential OOB read in smb3_enum_snapshots()", "id": "2546354", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546354"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's Server Message Block (SMB) client. This issue leads to information disclosure caused by an out-of-bounds memory read during snapshot enumeration. A malicious SMB server can provide an unexpectedly short response, causing the kernel client to read beyond the allocated buffer and leak adjacent kernel memory to local user space."], "name": "CVE-2026-98169", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98169\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98169\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98169.mbox"], "threat_severity": "Moderate"}

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