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fuse: re-lock request before replacing page cache folio

Type: advisorySource: Official CVE List1 source record

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().

Announced Group revision 1
Original source ↗

CVE-2026-53388

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-53388

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
        "lessThan": "7c18691e0cfda29672f79bafde8abdb7710674f6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
        "lessThan": "5927b43a4f8d89e86930f524bf63e9c7e66f61b4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
        "lessThan": "030fe3e9d8abdee303dd7e9e42f45082d382a407",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
        "lessThan": "46473ddccdc5065033e397d6e62c280dbcd3d9c2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
        "lessThan": "af2892249d982a1c036ca456cc135374e68b6677",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
        "lessThan": "0223f452532d9cd8a5e87c45de828fd93c99bd25",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
        "lessThan": "e28db6ac4792d065ab32565fd9f0a2361c3d4666",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
        "lessThan": "a078484921052d0badd827fcc2770b5cfc1d4120",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/fuse/dev.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.35"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.35",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.211",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.177",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.144",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.95",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.37",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.14",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.2",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/fuse/dev.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-53388

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40818 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-53388 · Revision 1Source updated