CVE-2026-74566 (GCVE-0-2026-74566)
Vulnerability from cvelistv5
Published
2026-08-15 12:28
Modified
2026-08-19 16:39
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
keys: make keyring key-chunk byte order agree with keyring_diff_objects()
keyring_get_key_chunk() loads description bytes into the index chunk low
address first, while keyring_diff_objects() numbers the first differing
bit from the low end and folds the absolute byte index into the level
without removing the inline-prefix offset the level already carries.
The two disagree on byte order and bit position, so the array can be
told two keys first differ at a bit that does not differ in the chunk
the walker uses, letting crafted descriptions collide into one node.
Load the chunk in the order keyring_diff_objects() assumes and drop the
inline-prefix length when folding the byte index into the level. This
only changes the in-memory ordering used to place keys within a keyring;
add, search and read of non-colliding keys are unaffected.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: f771fde82051976a6fc0fd570f8b86de4a92124b Version: f771fde82051976a6fc0fd570f8b86de4a92124b Version: f771fde82051976a6fc0fd570f8b86de4a92124b Version: f771fde82051976a6fc0fd570f8b86de4a92124b Version: f771fde82051976a6fc0fd570f8b86de4a92124b Version: f771fde82051976a6fc0fd570f8b86de4a92124b Version: f771fde82051976a6fc0fd570f8b86de4a92124b Version: f771fde82051976a6fc0fd570f8b86de4a92124b |
||
{
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"version": "0",
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"status": "unaffected",
"version": "5.10.265",
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},
{
"lessThanOrEqual": "5.15.*",
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"version": "5.15.216",
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},
{
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"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.6.151",
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{
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{
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{
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],
"cpeApplicability": [
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"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkeys: make keyring key-chunk byte order agree with keyring_diff_objects()\n\nkeyring_get_key_chunk() loads description bytes into the index chunk low\naddress first, while keyring_diff_objects() numbers the first differing\nbit from the low end and folds the absolute byte index into the level\nwithout removing the inline-prefix offset the level already carries.\nThe two disagree on byte order and bit position, so the array can be\ntold two keys first differ at a bit that does not differ in the chunk\nthe walker uses, letting crafted descriptions collide into one node.\n\nLoad the chunk in the order keyring_diff_objects() assumes and drop the\ninline-prefix length when folding the byte index into the level. This\nonly changes the in-memory ordering used to place keys within a keyring;\nadd, search and read of non-colliding keys are unaffected."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:39:06.890Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/414bcf37d81ce9b3823aabc06b04c97fdcbe489b"
},
{
"url": "https://git.kernel.org/stable/c/abe43c661efb753d5ee35ad8ace4bbb16fa9afd0"
},
{
"url": "https://git.kernel.org/stable/c/f81920917074e3c4ad4fba06fe8c56738d010606"
},
{
"url": "https://git.kernel.org/stable/c/bd0f976ef89dce6db458bf75bc2cf51127becc41"
},
{
"url": "https://git.kernel.org/stable/c/7269df3e7fcfa308e6a456305162f7788747bdbd"
},
{
"url": "https://git.kernel.org/stable/c/3d9f16c0b643ceac305526b2e2fe25c2c6166926"
},
{
"url": "https://git.kernel.org/stable/c/7e5397a3fed0dee7779bd084bec3c0584db3c930"
},
{
"url": "https://git.kernel.org/stable/c/58565eef0f8d861aae92abfb7658458d661cee17"
}
],
"title": "keys: make keyring key-chunk byte order agree with keyring_diff_objects()",
"x_generator": {
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},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74566",
"datePublished": "2026-08-15T12:28:07.628Z",
"dateReserved": "2026-08-15T05:44:03.917Z",
"dateUpdated": "2026-08-19T16:39:06.890Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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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