{"id":"CVE-2026-98901","title":"ksmbd: fix lease break and ack state handling","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix lease break and ack state handling\n\nDo not skip valid lease states containing WRITE_CACHING when breaking\nlevel-II/read leases for writes and truncates.\n\nHan…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 17699905a381621c1cee5b6528feb05acedc86a4","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3251ea36df5eef58aa207fbee48849d89b922ea6","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fba4653a0b4dc2f6d42600abe21fb326292f70ff","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5015191096db311759fef98769270336cd8b1324","Linux < 6.6.158","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T11:54:11.554Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98901","references":[{"url":"https://git.kernel.org/stable/c/17699905a381621c1cee5b6528feb05acedc86a4"},{"url":"https://git.kernel.org/stable/c/3251ea36df5eef58aa207fbee48849d89b922ea6"},{"url":"https://git.kernel.org/stable/c/fba4653a0b4dc2f6d42600abe21fb326292f70ff"},{"url":"https://git.kernel.org/stable/c/5015191096db311759fef98769270336cd8b1324"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.575Z","slug":"CVE-2026-98901","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix lease break and ack state handling\n\nDo not skip valid lease states containing WRITE_CACHING when breaking\nlevel-II/read leases for writes and truncates.\n\nHandle lease break acknowledgments according to the SMB2 rule that the\nacknowledged state must be a subset of the server's break target. Apply\nthe acknowledged state directly and keep the break pending on failed ACKs.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 17699905a381621c1cee5b6528feb05acedc86a4`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3251ea36df5eef58aa207fbee48849d89b922ea6`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fba4653a0b4dc2f6d42600abe21fb326292f70ff`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5015191096db311759fef98769270336cd8b1324`\n- `Linux < 6.6.158`\n- `Linux < 6.12.111`\n- `Linux < 6.18.53`\n- `Linux (all versions)`\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":[]}