{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89642","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.741Z","datePublished":"2026-09-11T19:45:34.778Z","dateUpdated":"2026-09-13T06:24:05.607Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-13T06:24:05.607Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: call pagecache_isize_extended() in cifs_setsize() when extending\n\ncifs_setsize() calls truncate_pagecache() but skips\npagecache_isize_extended() on extension.  truncate_setsize() shows\nthe correct pattern:\n\n  i_size_write(inode, newsize);\n  if (newsize > oldsize)\n      pagecache_isize_extended(inode, oldsize, newsize);\n  truncate_pagecache(inode, newsize);\n\npagecache_isize_extended() zeroes the tail of the page straddling old\nEOF.  Without it, dirty bytes in that region can be written back to\nthe server, exposing stale data in the newly extended range."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/inode.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"12bafe32f09c0d24f5096154b59c347b9c6606e0","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c510edb9734af1c274d18f4f31a471a166bbc7e8","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/inode.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"7.2.4","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/12bafe32f09c0d24f5096154b59c347b9c6606e0"},{"url":"https://git.kernel.org/stable/c/c510edb9734af1c274d18f4f31a471a166bbc7e8"}],"title":"cifs: call pagecache_isize_extended() in cifs_setsize() when extending","x_generator":{"engine":"bippy-1.2.0"}}}}