{"id":"CVE-2026-98685","title":"smb: client: discard post-EOF pagecache when extending a file via clone range","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: discard post-EOF pagecache when extending a file via clone range\n\ncifs_remap_file_range() discarded the pagecache only for the folios\noverlapping the desti…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= c54fc3a4f375663f2361a9cbb2955fb4ef912879 < 15bb9f1d3e967e328649e92a1451e60a0dc66118","Linux >= c54fc3a4f375663f2361a9cbb2955fb4ef912879 < 4721587f96cb8de8164f3fd203093a0875560999","Linux 358bd5f436d820bb758833050aae065b35d6986c","Linux 43801359c8971cc49b4a4db5015fba77fbd09c32","Linux >= 6.1.68 < 6.2","Linux >= 6.6.7 < 6.7","Linux 6.7"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:45:53.821Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98685","references":[{"url":"https://git.kernel.org/stable/c/15bb9f1d3e967e328649e92a1451e60a0dc66118"},{"url":"https://git.kernel.org/stable/c/4721587f96cb8de8164f3fd203093a0875560999"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.528Z","slug":"CVE-2026-98685","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: discard post-EOF pagecache when extending a file via clone range\n\ncifs_remap_file_range() discarded the pagecache only for the folios\noverlapping the destination region, so when a clone extends the file the\nfolio straddling the old EOF - which may hold data dirtied past EOF\nthrough an mmap - was never dropped and became visible as file content\nonce the file was extended.\n\nStart the discard at the smaller of fstart and the old EOF.  i_size is\nstill old here, so nothing past the old EOF is flushed to the server.\n\n## Affected\n\n- `Linux >= c54fc3a4f375663f2361a9cbb2955fb4ef912879 < 15bb9f1d3e967e328649e92a1451e60a0dc66118`\n- `Linux >= c54fc3a4f375663f2361a9cbb2955fb4ef912879 < 4721587f96cb8de8164f3fd203093a0875560999`\n- `Linux 358bd5f436d820bb758833050aae065b35d6986c`\n- `Linux 43801359c8971cc49b4a4db5015fba77fbd09c32`\n- `Linux >= 6.1.68 < 6.2`\n- `Linux >= 6.6.7 < 6.7`\n- `Linux 6.7`\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":[]}