CVE-2025-39822 (GCVE-0-2025-39822)
Vulnerability from cvelistv5
Published
2025-09-16 13:00
Modified
2025-09-29 06:00
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
io_uring/kbuf: fix signedness in this_len calculation
When importing and using buffers, buf->len is considered unsigned.
However, buf->len is converted to signed int when committing. This can
lead to unexpected behavior if the buffer is large enough to be
interpreted as a negative value. Make min_t calculation unsigned.
References
Impacted products
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"product": "Linux",
"programFiles": [
"io_uring/kbuf.c"
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"vendor": "Linux",
"versions": [
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"version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
"versionType": "git"
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"versions": [
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"version": "6.12"
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"version": "0",
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"status": "unaffected",
"version": "6.16.5",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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}
],
"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"references": [
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"url": "https://git.kernel.org/stable/c/f4f411c068402c370c4f9a9d4950a97af97bbbb1"
},
{
"url": "https://git.kernel.org/stable/c/c64eff368ac676e8540344d27a3de47e0ad90d21"
}
],
"title": "io_uring/kbuf: fix signedness in this_len calculation",
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"cveId": "CVE-2025-39822",
"datePublished": "2025-09-16T13:00:21.533Z",
"dateReserved": "2025-04-16T07:20:57.139Z",
"dateUpdated": "2025-09-29T06:00:22.299Z",
"state": "PUBLISHED"
},
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}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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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