CVE-2026-53388fuse: re-lock request before replacing page cache folio
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In 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().
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ce534fb052928ce556639d7ecf01cbf4e01321e1 before 7c18691e0cfda29672f79bafde8abdb7710674f6; from ce534fb052928ce556639d7ecf01cbf4e01321e1 before 5927b43a4f8d89e86930f524bf63e9c7e66f61b4; from ce534fb052928ce556639d7ecf01cbf4e01321e1 before 030fe3e9d8abdee303dd7e9e42f45082d382a407; from ce534fb052928ce556639d7ecf01cbf4e01321e1 before 46473ddccdc5065033e397d6e62c280dbcd3d9c2; from ce534fb052928ce556639d7ecf01cbf4e01321e1 before af2892249d982a1c036ca456cc135374e68b6677; from ce534fb052928ce556639d7ecf01cbf4e01321e1 before 0223f452532d9cd8a5e87c45de828fd93c99bd25; from ce534fb052928ce556639d7ecf01cbf4e01321e1 before e28db6ac4792d065ab32565fd9f0a2361c3d4666; from ce534fb052928ce556639d7ecf01cbf4e01321e1 before a078484921052d0badd827fcc2770b5cfc1d4120 | CNA record |
linux linux_kernel linux:linux_kernel | from 2.6.35 before 5.15.211; from 5.16 before 6.1.177; from 6.2 before 6.6.144; from 6.7 before 6.12.95; from 6.13 before 6.18.37; from 6.19 before 7.0.14; from 7.1 before 7.1.2 | NVD |
References
- https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6patch
- https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4patch
- https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407patch
- https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2patch
- https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677patch
- https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25patch
- https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666patch
- https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.