fuse: reject fuse_notify() pagecache ops on directories
In the Linux kernel, the following vulnerability has been resolved: fuse: reject fuse_notify() pagecache ops on directories The operations FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE allow the FUSE daemon to actively write/read pagecache contents. For directories with FOPEN_CACHE_DIR, the pagecache is used as kernel-internal cache storage, and userspace is not supposed to have direct access to this cache - in particular, fuse_parse_cache() will hit WARN_ON() if the cache contains bogus data. Reject FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE on anything other than regular files with -EINVAL.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.259, 5.15.210, 6.1.176, 6.12.94, 6.18.36, 6.6.143, 7.0.13
- CVEs
- CVE-2026-53168
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 03:29 UTC · Revision 1
Source evidence
fuse: reject fuse_notify() pagecache ops on directories
core-osv · Original sourcePublished 25 Jun 2026, 08:38 UTC
In the Linux kernel, the following vulnerability has been resolved: fuse: reject fuse_notify() pagecache ops on directories The operations FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE allow the FUSE daemon to actively write/read pagecache contents. For directories with FOPEN_CACHE_DIR, the pagecache is used as kernel-internal cache storage, and userspace is not supposed to have direct access to this cache - in particular, fuse_parse_cache() will hit WARN_ON() if the cache contains bogus data. Reject FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE on anything other than regular files with -EINVAL.
osv:CVE-2026-53168
Kernel
Fixed versions: 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13
Complete source record
{
"id": "2ae29f623c5eba062044bd40d61081fd25e78ed0605b9011052bc611bd731e0c",
"url": "https://osv.dev/vulnerability/CVE-2026-53168",
"method": "structured",
"payload": {
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"title": "fuse: reject fuse_notify() pagecache ops on directories",
"summary": "In the Linux kernel, the following vulnerability has been resolved: fuse: reject fuse_notify() pagecache ops on directories The operations FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE allow the FUSE daemon to actively write/read pagecache contents. For directories with FOPEN_CACHE_DIR, the pagecache is used as kernel-internal cache storage, and userspace is not supposed to have direct access to this cache - in particular, fuse_parse_cache() will hit WARN_ON() if the cache contains bogus data. Reject FUSE_NOTIFY_STORE and FUSE_NOTIFY_RETRIEVE on anything other than regular files with -EINVAL.",
"evidence": "osv:CVE-2026-53168",
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"modified": "2026-10-28T02:30:49.582756890Z",
"provider": "osv",
"references": [
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"https://nvd.nist.gov/vuln/detail/CVE-2026-53168",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"evidence": "/id"
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"security_relevant": true,
"severity_evidence": null
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"source_id": "core-osv",
"document_id": 517760,
"published_at": "2026-06-25T08:38:47.42+00:00"
}