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CVE-2026-98686

UnknownEPSS 0.17%

Last modified

CVE-2026-98686 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.17%

6.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 72c419d9b073628d3b5b0b2fc787b724f1a8c726, < 1ecf89d8efca618e0c758c06b9a1fdde8bd941da; >= 72c419d9b073628d3b5b0b2fc787b724f1a8c726, < 03408d15c5405f8dc3e1a114cdce2174027a85f6; >= 72c419d9b073628d3b5b0b2fc787b724f1a8c726, < 3df27277f8f95345d4a6c57367824bf1aefdbf66; >= 72c419d9b073628d3b5b0b2fc787b724f1a8c726, < 94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183; >= 72c419d9b073628d3b5b0b2fc787b724f1a8c726, < b75dadb50a25eed525264bf6fea44fad94e7626f; >= 72c419d9b073628d3b5b0b2fc787b724f1a8c726, < 6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d; >= 72c419d9b073628d3b5b0b2fc787b724f1a8c726, < da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0
LinuxLinux5.1

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98686?
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.
How severe is CVE-2026-98686?
Severity scoring for CVE-2026-98686 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-98686?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST