CVE-2026-53388 (GCVE-0-2026-53388)

Vulnerability from cvelistv5 – Published: 2026-07-19 11:59 – Updated: 2026-07-20 13:39
VLAI
Title
fuse: re-lock request before replacing page cache folio
Summary
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().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 7c18691e0cfda29672f79bafde8abdb7710674f6 (git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 5927b43a4f8d89e86930f524bf63e9c7e66f61b4 (git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 030fe3e9d8abdee303dd7e9e42f45082d382a407 (git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 46473ddccdc5065033e397d6e62c280dbcd3d9c2 (git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < af2892249d982a1c036ca456cc135374e68b6677 (git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 0223f452532d9cd8a5e87c45de828fd93c99bd25 (git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < e28db6ac4792d065ab32565fd9f0a2361c3d4666 (git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < a078484921052d0badd827fcc2770b5cfc1d4120 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.35
Unaffected: 0 , < 2.6.35 (semver)
Unaffected: 5.15.211 , ≤ 5.15.* (semver)
Unaffected: 6.1.177 , ≤ 6.1.* (semver)
Unaffected: 6.6.144 , ≤ 6.6.* (semver)
Unaffected: 6.12.95 , ≤ 6.12.* (semver)
Unaffected: 6.18.37 , ≤ 6.18.* (semver)
Unaffected: 7.0.14 , ≤ 7.0.* (semver)
Unaffected: 7.1.2 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7c18691e0cfda29672f79bafde8abdb7710674f6",
              "status": "affected",
              "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
              "versionType": "git"
            },
            {
              "lessThan": "5927b43a4f8d89e86930f524bf63e9c7e66f61b4",
              "status": "affected",
              "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
              "versionType": "git"
            },
            {
              "lessThan": "030fe3e9d8abdee303dd7e9e42f45082d382a407",
              "status": "affected",
              "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
              "versionType": "git"
            },
            {
              "lessThan": "46473ddccdc5065033e397d6e62c280dbcd3d9c2",
              "status": "affected",
              "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
              "versionType": "git"
            },
            {
              "lessThan": "af2892249d982a1c036ca456cc135374e68b6677",
              "status": "affected",
              "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
              "versionType": "git"
            },
            {
              "lessThan": "0223f452532d9cd8a5e87c45de828fd93c99bd25",
              "status": "affected",
              "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
              "versionType": "git"
            },
            {
              "lessThan": "e28db6ac4792d065ab32565fd9f0a2361c3d4666",
              "status": "affected",
              "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
              "versionType": "git"
            },
            {
              "lessThan": "a078484921052d0badd827fcc2770b5cfc1d4120",
              "status": "affected",
              "version": "ce534fb052928ce556639d7ecf01cbf4e01321e1",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.35"
            },
            {
              "lessThan": "2.6.35",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.211",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.211",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.177",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.144",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.95",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.37",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.14",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.2",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc1",
                  "versionStartIncluding": "2.6.35",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-20T13:39:51.906Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6"
        },
        {
          "url": "https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407"
        },
        {
          "url": "https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2"
        },
        {
          "url": "https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677"
        },
        {
          "url": "https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25"
        },
        {
          "url": "https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666"
        },
        {
          "url": "https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120"
        }
      ],
      "title": "fuse: re-lock request before replacing page cache folio",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53388",
    "datePublished": "2026-07-19T11:59:34.456Z",
    "dateReserved": "2026-06-09T07:44:35.402Z",
    "dateUpdated": "2026-07-20T13:39:51.906Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53388",
      "date": "2026-07-21",
      "epss": "0.00126",
      "percentile": "0.02635"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-20T14:44:42.000Z",
      "cve": "CVE-2026-53388",
      "id": "msrc_CVE-2026-53388",
      "initial_release_date": "2026-07-20T01:05:40.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "fuse: re-lock request before replacing page cache folio",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53388.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53388\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-19T12:16:49.757\",\"lastModified\":\"2026-07-20T15:16:41.280\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/fuse/dev.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/fuse/dev.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.35\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.35\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.211\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.177\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.144\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.95\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.37\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.14\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.2\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0223f452532d9cd8a5e87c45de828fd93c99bd25\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/030fe3e9d8abdee303dd7e9e42f45082d382a407\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/46473ddccdc5065033e397d6e62c280dbcd3d9c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5927b43a4f8d89e86930f524bf63e9c7e66f61b4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c18691e0cfda29672f79bafde8abdb7710674f6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a078484921052d0badd827fcc2770b5cfc1d4120\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/af2892249d982a1c036ca456cc135374e68b6677\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e28db6ac4792d065ab32565fd9f0a2361c3d4666\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-20T17:09:28+00:00",
      "cve": "CVE-2026-53388",
      "id": "CVE-2026-53388",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "274",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fuse: re-lock request before replacing page cache folio",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53388.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.