GHSA-826X-H445-JQCG
Vulnerability from github – Published: 2026-10-18 18:31 – Updated: 2026-10-30 15:33In 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.
{
"affected": [],
"aliases": [
"CVE-2026-98686"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-18T16:17:21Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: discard post-EOF pagecache when extending a file via zero range\n\nsmb3_zero_range() removed the pagecache only for the range being zeroed,\nso when it extends the file the folio straddling the old EOF - which may\nhold data dirtied past EOF through an mmap - was never dropped and became\nvisible as file content once the file was extended.\n\nLower the discard boundary to the smaller of the zero-range offset and the\nold EOF.",
"id": "GHSA-826x-h445-jqcg",
"modified": "2026-10-30T15:33:55Z",
"published": "2026-10-18T18:31:59Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98686"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/03408d15c5405f8dc3e1a114cdce2174027a85f6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1ecf89d8efca618e0c758c06b9a1fdde8bd941da"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3df27277f8f95345d4a6c57367824bf1aefdbf66"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b75dadb50a25eed525264bf6fea44fad94e7626f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0"
}
],
"schema_version": "1.4.0",
"severity": []
}
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