CVE-2026-98686smb: client: discard post-EOF pagecache when extending a file via zero range
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 12 days later
· 12 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 72c419d9b073628d3b5b0b2fc787b724f1a8c726 – < 1ecf89d8efca618e0c758c06b9a1fdde8bd941da
- affected 72c419d9b073628d3b5b0b2fc787b724f1a8c726 – < 03408d15c5405f8dc3e1a114cdce2174027a85f6
- affected 72c419d9b073628d3b5b0b2fc787b724f1a8c726 – < 3df27277f8f95345d4a6c57367824bf1aefdbf66
- affected 72c419d9b073628d3b5b0b2fc787b724f1a8c726 – < 94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183
- affected 72c419d9b073628d3b5b0b2fc787b724f1a8c726 – < b75dadb50a25eed525264bf6fea44fad94e7626f
- affected 72c419d9b073628d3b5b0b2fc787b724f1a8c726 – < 6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d
- affected 72c419d9b073628d3b5b0b2fc787b724f1a8c726 – < da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0
- affected 5.1
- unaffected < 5.1
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.56 – ≤ 6.18.*
- unaffected 7.2.10 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/1ecf89d8efca618e0c758c06b9a1fdde8bd941da (opens in a new tab)
- https://git.kernel.org/stable/c/03408d15c5405f8dc3e1a114cdce2174027a85f6 (opens in a new tab)
- https://git.kernel.org/stable/c/3df27277f8f95345d4a6c57367824bf1aefdbf66 (opens in a new tab)
- https://git.kernel.org/stable/c/94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183 (opens in a new tab)
- https://git.kernel.org/stable/c/b75dadb50a25eed525264bf6fea44fad94e7626f (opens in a new tab)
- https://git.kernel.org/stable/c/6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d (opens in a new tab)
- https://git.kernel.org/stable/c/da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-103940 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98686)Record last updated .