GHSA-45W6-5FRG-3VFQ
Vulnerability from github – Published: 2026-07-19 12:30 – Updated: 2026-07-20 15:31In the Linux kernel, the following vulnerability has been resolved:
fuse: re-lock request before replacing page cache folio
fuse_try_move_folio() unlocks the request on entry but does not re-lock it on the success path. This means fuse_chan_abort() can end the request and free the fuse_io_args (eg fuse_readpages_end()) while the subsequent copy chain logic after fuse_try_move_folio() accesses the fuse_io_args, leading to use-after-free issues.
Fix this by calling lock_request() before replace_page_cache_folio(). This ensures the request is locked on the success path which will prevent the fuse_io_args from being freed while the later copying logic runs, and also ensures that the ap->folios[i]->mapping is never null since ap->folios[i] will always point to the newfolio after replace_page_cache_folio().
{
"affected": [],
"aliases": [
"CVE-2026-53388"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-19T12:16:49Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: re-lock request before replacing page cache folio\n\nfuse_try_move_folio() unlocks the request on entry but does not\nre-lock it on the success path. This means fuse_chan_abort() can end the\nrequest and free the fuse_io_args (eg fuse_readpages_end()) while the\nsubsequent copy chain logic after fuse_try_move_folio() accesses the\nfuse_io_args, leading to use-after-free issues.\n\nFix this by calling lock_request() before replace_page_cache_folio().\nThis ensures the request is locked on the success path which will\nprevent the fuse_io_args from being freed while the later copying logic\nruns, and also ensures that the ap-\u003efolios[i]-\u003emapping is never null\nsince ap-\u003efolios[i] will always point to the newfolio after\nreplace_page_cache_folio().",
"id": "GHSA-45w6-5frg-3vfq",
"modified": "2026-07-20T15:31:44Z",
"published": "2026-07-19T12:30:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53388"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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