CVE-2026-52954 (GCVE-0-2026-52954)
Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-29 04:18
VLAI
Title
libceph: handle rbtree insertion error in decode_choose_args()
Summary
In the Linux kernel, the following vulnerability has been resolved:
libceph: handle rbtree insertion error in decode_choose_args()
A message of type CEPH_MSG_OSD_MAP contains an OSD map that itself
contains a CRUSH map. The received CRUSH map may optionally contain
choose_args that get decoded in decode_choose_args(). In this function,
num_choose_arg_maps is read from the message, and a corresponding number
of crush_choose_arg_maps gets decoded afterwards. Each
crush_choose_arg_map has a choose_args_index, which serves as the key
when inserting it into the choose_args rbtree of the decoded crush_map.
If a (potentially corrupted) message contains two crush_choose_arg_maps
with the same index, the assertion in insert_choose_arg_map() triggers a
kernel BUG when trying to insert the second crush_choose_arg_map.
This patch fixes the issue by switching to the non-asserting rbtree
insertion function and rejecting the message if the insertion fails.
[ idryomov: changelog ]
Severity
7.5 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
5cf9c4a9959b6273675310d14a834ef14fbca37c , < c7bf7864e2924fa5508ac270b0e9364bc13d5a6c
(git)
Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < f47430fc1f815e87406e2d3b4e476eff1bc7fd9b (git) Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < 0b6a3bcb91bc5bfeda39f0df3b71bab62c13e9da (git) Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < 534ebc08df97c47d4c7596f336fa31ecbf91519c (git) Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < 80c73bd1b2b04355d1d0c29be8ccbd25a380905d (git) Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < 4d2b37abda9536808655830d683dc491d31741a8 (git) Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < 0a1265a9ab875f92b6a3ffb497404f46cf9d76a3 (git) Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < d289478cfc0bcf81c7914200d6abdcb78bd04ded (git) |
|
| Linux | Linux |
Affected:
4.13
Unaffected: 0 , < 4.13 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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"version": "5.10.258",
"versionType": "semver"
},
{
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"version": "5.15.209",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.141",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.12.91",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.33",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver"
},
{
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"versionType": "original_commit_for_fix"
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: handle rbtree insertion error in decode_choose_args()\n\nA message of type CEPH_MSG_OSD_MAP contains an OSD map that itself\ncontains a CRUSH map. The received CRUSH map may optionally contain\nchoose_args that get decoded in decode_choose_args(). In this function,\nnum_choose_arg_maps is read from the message, and a corresponding number\nof crush_choose_arg_maps gets decoded afterwards. Each\ncrush_choose_arg_map has a choose_args_index, which serves as the key\nwhen inserting it into the choose_args rbtree of the decoded crush_map.\nIf a (potentially corrupted) message contains two crush_choose_arg_maps\nwith the same index, the assertion in insert_choose_arg_map() triggers a\nkernel BUG when trying to insert the second crush_choose_arg_map.\n\nThis patch fixes the issue by switching to the non-asserting rbtree\ninsertion function and rejecting the message if the insertion fails.\n\n[ idryomov: changelog ]"
}
],
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
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},
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},
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},
{
"url": "https://git.kernel.org/stable/c/d289478cfc0bcf81c7914200d6abdcb78bd04ded"
}
],
"title": "libceph: handle rbtree insertion error in decode_choose_args()",
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"cveId": "CVE-2026-52954",
"datePublished": "2026-06-24T16:28:36.992Z",
"dateReserved": "2026-06-09T07:44:35.372Z",
"dateUpdated": "2026-06-29T04:18:41.413Z",
"state": "PUBLISHED"
},
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"date": "2026-07-05",
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"percentile": "0.40928"
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Each\\ncrush_choose_arg_map has a choose_args_index, which serves as the key\\nwhen inserting it into the choose_args rbtree of the decoded crush_map.\\nIf a (potentially corrupted) message contains two crush_choose_arg_maps\\nwith the same index, the assertion in insert_choose_arg_map() triggers a\\nkernel BUG when trying to insert the second crush_choose_arg_map.\\n\\nThis patch fixes the issue by switching to the non-asserting rbtree\\ninsertion function and rejecting the message if the insertion fails.\\n\\n[ idryomov: changelog 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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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