{"id":"CVE-2026-98167","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix server->total_read for compound encrypted PDUs\n\nIn receive_encrypted_standard(), server->total_read is left at the\nfull decrypted frame size when walki…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix server->total_read for compound encrypted PDUs\n\nIn receive_encrypted_standard(), server->total_read is left at the\nfull decrypted frame size when walki…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 < 8703539d22fdbc13dd2db090ee199c3a427b8ea0","Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 < e78fc1d240b27349b45a0f1c3e3c2c401d7e230d","Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 < a46eb242e9eef3a3897d166748b23303c516e870","Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 < ebb8a075fdc7af3d196a4f158a0e18dbc394c0e3","Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 < 282b72f9a7ef31296c48366db4128882999cc048","Linux >= b24df3e30cbf48255db866720fb71f14bf9d2f39 < f73726b83e4756fdaa099e1bc1143293bd57ad79","Linux 4.19"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:17:58.177","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98167","references":[{"url":"https://git.kernel.org/stable/c/282b72f9a7ef31296c48366db4128882999cc048","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8703539d22fdbc13dd2db090ee199c3a427b8ea0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a46eb242e9eef3a3897d166748b23303c516e870","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e78fc1d240b27349b45a0f1c3e3c2c401d7e230d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ebb8a075fdc7af3d196a4f158a0e18dbc394c0e3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f73726b83e4756fdaa099e1bc1143293bd57ad79","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-06T08:50:17.459Z","slug":"CVE-2026-98167","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix server->total_read for compound encrypted PDUs\n\nIn receive_encrypted_standard(), server->total_read is left at the\nfull decrypted frame size when walking sub-PDUs of a compound encrypted\nframe. As a result, cifs_handle_standard() passes this full size\nto smb2_check_message(), causing the PDU length guards to incorrectly\nvalidate the entire compound frame instead of the current sub-PDU.\n\nThis allows truncated non-last sub-PDUs to bypass length validation,\nleading to out-of-bounds reads in smb2_get_data_area_len().\n\nFix this by setting server->total_read to the true length of the\ncurrent sub-PDU: next_cmd for non-last sub-PDUs, and the remaining\npdu_length for the last one.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}