{"id":41155,"date":"2026-10-19T00:32:23","date_gmt":"2026-10-18T16:32:23","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98683"},"modified":"2026-10-19T00:32:23","modified_gmt":"2026-10-18T16:32:23","slug":"cve-2026-98683","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98683","title":{"rendered":"CVE-2026-98683 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: flush di"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: flush dirty data before zeroing a range<\/p>\n<p>smb3_zero_range() emulates FALLOC_FL_ZERO_RANGE by invalidating the<br \/>\npage cache over the target range with truncate_pagecache_range() and<br \/>\nthen issuing FSCTL_SET_ZERO_DATA to the server.<\/p>\n<p>Dirty data was only flushed conditionally, when the range reached or<br \/>\nextended EOF.  For a purely interior zero range that does not reach<br \/>\nEOF, no flush happened, so a dirty folio overlapping the range could<br \/>\nbe written back to the server after the FSCTL and refill the range<br \/>\nthat was just zeroed with stale data.<\/p>\n<p>Fix this by unconditionally flushing and waiting for dirty data in the<br \/>\nrange before invalidating the page cache and issuing<br \/>\nFSCTL_SET_ZERO_DATA, exactly as was done for smb3_punch_hole() in<br \/>\ncommit d7d2adcd022b (&#8220;smb\/client: flush dirty data before punching a<br \/>\nhole&#8221;); the two paths are structurally identical here.<\/p>\n<p>This is observed as generic\/363 randomly reading stale data where a<br \/>\nzeroed range is expected against Windows Server.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: flush dirty data before zeroing a range<\/p>\n<p>smb3_zero_range() emulates FALLOC_FL_ZERO_RANGE by invalidating the<br \/>\npage cach<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-41155","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/41155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}