CVE-2026-98170

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98170", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.322Z", "datePublished": "2026-10-06T08:44:15.138Z", "dateUpdated": "2026-10-30T12:37:48.952Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:37:48.952Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix OOB struct field reads in move_smb2_ea_to_cifs()\n\nIn move_smb2_ea_to_cifs(), the while (src_size > 0) loop condition is\ninsufficient. It allows iteration to continue even if the remaining\nsrc_size is too small to contain a complete smb2_ea_info structure.\nConsequently, reads of ea_name_length and ea_value_length can occur\nout-of-bounds.\n\nFix this by ensuring src_size >= sizeof(*src) before attempting to read\nany structure fields. Additionally, reject any next_entry_offset that is\nsmaller than sizeof(*src) or that would advance the pointer beyond the\navailable buffer.\n\nNote that for calls where the server returns a malformed EA list, the\nerror returned to userspace changes from -ENODATA (getxattr) or\n-ERANGE (listxattr) to -EIO. This correctly signals a server protocol\nerror rather than misleadingly indicating \"attribute not present\" or\n\"output buffer too small\"."}], "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", "fs/smb/client/trace.h"], "versions": [{"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "lessThan": "22886b1b7464613373c9a7d0af2ace029c50cd97", "status": "affected", "versionType": "git"}, {"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "lessThan": "9d707a278c100c26d10fbbbd03988778ffc992ce", "status": "affected", "versionType": "git"}, {"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "lessThan": "90a13af4c9b1369327395bababfe87c75599cc19", "status": "affected", "versionType": "git"}, {"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "lessThan": "61812323c037a94e2e7f0db7ee740c34b126bffe", "status": "affected", "versionType": "git"}, {"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "lessThan": "d3546cecbf81d98bf3b472d341f981eb48c04f47", "status": "affected", "versionType": "git"}, {"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "lessThan": "34a3942e787b9c59758115bd65fe1ec89d68c7a4", "status": "affected", "versionType": "git"}, {"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "lessThan": "13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca", "status": "affected", "versionType": "git"}, {"version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "lessThan": "eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb", "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/smb2ops.c", "fs/smb/client/trace.h"], "versions": [{"version": "4.14", "status": "affected"}, {"version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "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": "6.12.112", "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", "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": "4.14", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/22886b1b7464613373c9a7d0af2ace029c50cd97"}, {"url": "https://git.kernel.org/stable/c/9d707a278c100c26d10fbbbd03988778ffc992ce"}, {"url": "https://git.kernel.org/stable/c/90a13af4c9b1369327395bababfe87c75599cc19"}, {"url": "https://git.kernel.org/stable/c/61812323c037a94e2e7f0db7ee740c34b126bffe"}, {"url": "https://git.kernel.org/stable/c/d3546cecbf81d98bf3b472d341f981eb48c04f47"}, {"url": "https://git.kernel.org/stable/c/34a3942e787b9c59758115bd65fe1ec89d68c7a4"}, {"url": "https://git.kernel.org/stable/c/13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca"}, {"url": "https://git.kernel.org/stable/c/eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb"}], "title": "smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c", "fs/smb/client/trace.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "22886b1b7464613373c9a7d0af2ace029c50cd97", "status": "affected", "version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "versionType": "git"}, {"lessThan": "9d707a278c100c26d10fbbbd03988778ffc992ce", "status": "affected", "version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "versionType": "git"}, {"lessThan": "90a13af4c9b1369327395bababfe87c75599cc19", "status": "affected", "version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "versionType": "git"}, {"lessThan": "61812323c037a94e2e7f0db7ee740c34b126bffe", "status": "affected", "version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "versionType": "git"}, {"lessThan": "d3546cecbf81d98bf3b472d341f981eb48c04f47", "status": "affected", "version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "versionType": "git"}, {"lessThan": "34a3942e787b9c59758115bd65fe1ec89d68c7a4", "status": "affected", "version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "versionType": "git"}, {"lessThan": "13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca", "status": "affected", "version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "versionType": "git"}, {"lessThan": "eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb", "status": "affected", "version": "95907fea4fd8ccc736e0a428e52159b4d42b9958", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c", "fs/smb/client/trace.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.14"}, {"lessThan": "4.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "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": "6.12.112", "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", "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 OOB struct field reads in move_smb2_ea_to_cifs()\n\nIn move_smb2_ea_to_cifs(), the while (src_size > 0) loop condition is\ninsufficient. It allows iteration to continue even if the remaining\nsrc_size is too small to contain a complete smb2_ea_info structure.\nConsequently, reads of ea_name_length and ea_value_length can occur\nout-of-bounds.\n\nFix this by ensuring src_size >= sizeof(*src) before attempting to read\nany structure fields. Additionally, reject any next_entry_offset that is\nsmaller than sizeof(*src) or that would advance the pointer beyond the\navailable buffer.\n\nNote that for calls where the server returns a malformed EA list, the\nerror returned to userspace changes from -ENODATA (getxattr) or\n-ERANGE (listxattr) to -EIO. This correctly signals a server protocol\nerror rather than misleadingly indicating \"attribute not present\" or\n\"output buffer too small\"."}], "id": "CVE-2026-98170", "lastModified": "2026-10-30T13:21:11.190", "metrics": {}, "published": "2026-10-06T09:17:58.640", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/22886b1b7464613373c9a7d0af2ace029c50cd97"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/34a3942e787b9c59758115bd65fe1ec89d68c7a4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/61812323c037a94e2e7f0db7ee740c34b126bffe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90a13af4c9b1369327395bababfe87c75599cc19"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d707a278c100c26d10fbbbd03988778ffc992ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d3546cecbf81d98bf3b472d341f981eb48c04f47"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs()", "id": "2546340", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546340"}, "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 SMB client. When processing extended file attributes returned by a server, insufficient buffer validation allows the kernel to read data past the allocated boundaries. A malicious or compromised server could exploit this issue by returning a malformed response, potentially causing a system crash resulting in a Denial of Service (DoS) or disclosing sensitive kernel memory."], "name": "CVE-2026-98170", "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-2026-98170\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98170\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98170.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[95907fea4fd8ccc736e0a428e52159b4d42b9958,d3546cecbf81d98bf3b472d341f981eb48c04f47)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[95907fea4fd8ccc736e0a428e52159b4d42b9958,34a3942e787b9c59758115bd65fe1ec89d68c7a4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[95907fea4fd8ccc736e0a428e52159b4d42b9958,13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[95907fea4fd8ccc736e0a428e52159b4d42b9958,eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb)"}}], "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": "affected", "versions": {"scheme": "generic", "value": "4.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.54,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc4,*]"}}], "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": "2026-10-06T13:15:15.867493+00:00", "updated": "2026-10-07T07:45:14.223985+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}