{"id":"CVE-2026-98170","title":"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","summary":"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 iterati…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 95907fea4fd8ccc736e0a428e52159b4d42b9958 < d3546cecbf81d98bf3b472d341f981eb48c04f47","Linux >= 95907fea4fd8ccc736e0a428e52159b4d42b9958 < 34a3942e787b9c59758115bd65fe1ec89d68c7a4","Linux >= 95907fea4fd8ccc736e0a428e52159b4d42b9958 < 13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca","Linux >= 95907fea4fd8ccc736e0a428e52159b4d42b9958 < eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb","Linux 4.14"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:17:58.640","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98170","references":[{"url":"https://git.kernel.org/stable/c/13efcd37a9b3d6ffa1579c3dda3e29c893ed9bca","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/34a3942e787b9c59758115bd65fe1ec89d68c7a4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d3546cecbf81d98bf3b472d341f981eb48c04f47","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eeb5ef6083e1cefa2ef75041b5597ff228b8d7bb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98170.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98170"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546340"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98170"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98170"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98170.mbox"},{"url":"https://git.kernel.org/stable/c/61812323c037a94e2e7f0db7ee740c34b126bffe"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-10-06T08:50:17.457Z","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-125"],"epss":0.00206,"epssPercentile":0.10487,"slug":"CVE-2026-98170","body":"## Overview\n\nIn 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\".\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98170.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":217220,"id":"CVE-2026-98170","ts":1791360764229,"field":"cvss","old":null,"new":"5.5"},{"seq":217219,"id":"CVE-2026-98170","ts":1791360764229,"field":"severity","old":"none","new":"medium"}]}