CVE-2026-31713 (GCVE-0-2026-31713)
Vulnerability from cvelistv5 – Published: 2026-05-01 13:56 – Updated: 2026-05-01 13:56
VLAI?
Title
fuse: abort on fatal signal during sync init
Summary
In the Linux kernel, the following vulnerability has been resolved:
fuse: abort on fatal signal during sync init
When sync init is used and the server exits for some reason (error, crash)
while processing FUSE_INIT, the filesystem creation will hang. The reason
is that while all other threads will exit, the mounting thread (or process)
will keep the device fd open, which will prevent an abort from happening.
This is a regression from the async mount case, where the mount was done
first, and the FUSE_INIT processing afterwards, in which case there's no
such recursive syscall keeping the fd open.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
dfb84c33079497bf27058b15780e1c7bba4c371b , < 0c7fca880a40a209a9c92be14143996d14b93ff6
(git)
Affected: dfb84c33079497bf27058b15780e1c7bba4c371b , < 300e812b882a174dca675d8028684001ad5826bc (git) Affected: dfb84c33079497bf27058b15780e1c7bba4c371b , < 204aa22a686bfee48daca7db620c1e017615f2ff (git) |
||
{
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/fuse/dev.c",
"fs/fuse/fuse_i.h",
"fs/fuse/inode.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"versionType": "git"
},
{
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"versionType": "git"
}
]
},
{
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"fs/fuse/fuse_i.h",
"fs/fuse/inode.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.18"
},
{
"lessThan": "6.18",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.25",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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},
{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: abort on fatal signal during sync init\n\nWhen sync init is used and the server exits for some reason (error, crash)\nwhile processing FUSE_INIT, the filesystem creation will hang. The reason\nis that while all other threads will exit, the mounting thread (or process)\nwill keep the device fd open, which will prevent an abort from happening.\n\nThis is a regression from the async mount case, where the mount was done\nfirst, and the FUSE_INIT processing afterwards, in which case there\u0027s no\nsuch recursive syscall keeping the fd open."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-01T13:56:09.254Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/0c7fca880a40a209a9c92be14143996d14b93ff6"
},
{
"url": "https://git.kernel.org/stable/c/300e812b882a174dca675d8028684001ad5826bc"
},
{
"url": "https://git.kernel.org/stable/c/204aa22a686bfee48daca7db620c1e017615f2ff"
}
],
"title": "fuse: abort on fatal signal during sync init",
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"assignerShortName": "Linux",
"cveId": "CVE-2026-31713",
"datePublished": "2026-05-01T13:56:09.254Z",
"dateReserved": "2026-03-09T15:48:24.133Z",
"dateUpdated": "2026-05-01T13:56:09.254Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-31713",
"date": "2026-05-05",
"epss": "0.00017",
"percentile": "0.04061"
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}
}
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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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