CVE-2026-98686smb: client: discard post-EOF pagecache when extending a file via zero range
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: smb: client: discard post-EOF pagecache when extending a file via zero range smb3_zero_range() removed the pagecache only for the range being zeroed, so when it extends the file the folio straddling the old EOF - which may hold data dirtied past EOF through an mmap - was never dropped and became visible as file content once the file was extended. Lower the discard boundary to the smaller of the zero-range offset and the old EOF.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 72c419d9b073628d3b5b0b2fc787b724f1a8c726 before 94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183; from 72c419d9b073628d3b5b0b2fc787b724f1a8c726 before b75dadb50a25eed525264bf6fea44fad94e7626f; 72c419d9b073628d3b5b0b2fc787b724f1a8c726 builds before 6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d; from 72c419d9b073628d3b5b0b2fc787b724f1a8c726 before da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0 | CNA record |
References
- https://git.kernel.org/stable/c/94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183
- https://git.kernel.org/stable/c/b75dadb50a25eed525264bf6fea44fad94e7626f
- https://git.kernel.org/stable/c/6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d
- https://git.kernel.org/stable/c/da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.