Threats Tagged 'cve-2026-89640'
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Threats Tagged 'cve-2026-89640'
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A vulnerability in the Linux kernel's CIFS implementation was fixed involving an underflow of a signed offset (loff_t) in the cifs_remap_file_range() function when the length parameter is zero. This underflow occurs when the offset is greater than the source inode size, leading to corruption of the ByteCount in a file system control request and inversion of the range in a file write operation. The fix involves proper bounds checking and eliminating a time-of-check to time-of-use (TOCTOU) race condition by rejecting offsets greater than the source size and treating offsets equal to the source size as no-ops. Join the discussion | GCVE Database | 09/11/2026, 21:31:35 UTC Added: 09/12/2026, 00:42:44 UTC |
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