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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-89642

cifs: call pagecache_isize_extended() in cifs_setsize() when extending

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: call pagecache_isize_extended() in cifs_setsize() when extending cifs_setsize() calls truncate_pagecache() but skips pagecache_isize_extended() on extension. truncate_setsize() shows the correct pattern: i_size_write(inode, newsize); if (newsize > oldsize) pagecache_isize_extended(inode, oldsize, newsize); truncate_pagecache(inode, newsize); pagecache_isize_extended() zeroes the tail of the page straddling old EOF. Without it, dirty bytes in that region can be written back to the server, exposing stale data in the newly extended range.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 880e1b5883a5d78d916fa446791c48f28a16719baffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 5463d96cd2e46064ceefcf861b028745a4f4c373affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 40c16040783abcc240bd1b453e679ea6ca30e19eaffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e1f692b6da3e632a25d0b3a99f833bb609bae1a3affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 12bafe32f09c0d24f5096154b59c347b9c6606e0affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < c510edb9734af1c274d18f4f31a471a166bbc7e8affected

Linux Linux

Default version status: affected

  • 2.6.12affected
  • 0 to < 2.6.12unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.114 to ≤ 6.12.*unaffected
  • 6.18.57 to ≤ 6.18.*unaffected
  • 7.2.4 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References