---
cve: "CVE-2026-53388"
severity: "HIGH"
cvss: 7.8
epss: "13%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-19 12:16:49"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-09T12:25:56+02:00"
---

# CVE-2026-53388

> 7.8 HIGH

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.15.211
- Kernel ≥ 6.1.177
- Kernel ≥ 6.6.144
- Kernel ≥ 6.12.95
- Kernel ≥ 6.18.37
- Kernel ≥ 7.0.14
- Kernel ≥ 7.1.2

## Referenzen

- <https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6>
- <https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4>
- <https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407>
- <https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2>
- <https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677>
- <https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25>
- <https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666>
- <https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53388) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_