CVE-2026-53388 (GCVE-0-2026-53388)
Vulnerability from cvelistv5 – Published: 2026-07-19 11:59 – Updated: 2026-08-17 04:50
VLAI
EPSS
VEX
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)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| 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) |
guessed | |
| 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 , ≤ * (original_commit_for_fix) |
guessed |
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"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()."
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"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",
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"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"
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"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-16T00:10:44Z",
"cve": "CVE-2026-53388",
"id": "CVE-2026-53388",
"initial_release_date": "2026-07-19T17:36:09Z",
"product_status:first_fixed": "194",
"product_status:known_affected": "394",
"product_status:known_not_affected": "147",
"product_status:recommended": "471",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-53388",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53388.json",
"version": "18"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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