CVE-2025-39888 (GCVE-0-2025-39888)
Vulnerability from cvelistv5
Published
2025-09-23 06:00
Modified
2025-09-23 06:00
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
fuse: Block access to folio overlimit
syz reported a slab-out-of-bounds Write in fuse_dev_do_write.
When the number of bytes to be retrieved is truncated to the upper limit
by fc->max_pages and there is an offset, the oob is triggered.
Add a loop termination condition to prevent overruns.
References
Impacted products
{ "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": "623719227b114d73a2cee45f1b343ced63ce09ec", "status": "affected", "version": "3568a956932621cafadafc8b75fcf6dc06555105", "versionType": "git" }, { "lessThan": "9d81ba6d49a7457784f0b6a71046818b86ec7e44", "status": "affected", "version": "3568a956932621cafadafc8b75fcf6dc06555105", "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": "6.16" }, { "lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "6.16.*", "status": "unaffected", "version": "6.16.8", "versionType": "semver" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "6.17-rc6", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.16.8", "versionStartIncluding": "6.16", "vulnerable": true }, { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.17-rc6", "versionStartIncluding": "6.16", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: Block access to folio overlimit\n\nsyz reported a slab-out-of-bounds Write in fuse_dev_do_write.\n\nWhen the number of bytes to be retrieved is truncated to the upper limit\nby fc-\u003emax_pages and there is an offset, the oob is triggered.\n\nAdd a loop termination condition to prevent overruns." } ], "providerMetadata": { "dateUpdated": "2025-09-23T06:00:54.156Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/623719227b114d73a2cee45f1b343ced63ce09ec" }, { "url": "https://git.kernel.org/stable/c/9d81ba6d49a7457784f0b6a71046818b86ec7e44" } ], "title": "fuse: Block access to folio overlimit", "x_generator": { "engine": "bippy-1.2.0" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2025-39888", "datePublished": "2025-09-23T06:00:54.156Z", "dateReserved": "2025-04-16T07:20:57.145Z", "dateUpdated": "2025-09-23T06:00:54.156Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "vulnerability-lookup:meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2025-39888\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-23T06:15:48.960\",\"lastModified\":\"2025-09-23T06:15:48.960\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfuse: Block access to folio overlimit\\n\\nsyz reported a slab-out-of-bounds Write in fuse_dev_do_write.\\n\\nWhen the number of bytes to be retrieved is truncated to the upper limit\\nby fc-\u003emax_pages and there is an offset, the oob is triggered.\\n\\nAdd a loop termination condition to prevent overruns.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/623719227b114d73a2cee45f1b343ced63ce09ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9d81ba6d49a7457784f0b6a71046818b86ec7e44\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}" } }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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