{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52955", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.373Z", "datePublished": "2026-06-24T16:28:37.748Z", "dateUpdated": "2026-07-15T00:45:47.779Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-29T04:18:43.177Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix potential out-of-bounds access in crush_decode()\n\nA message of type CEPH_MSG_OSD_MAP containing a crush map with at least\none bucket has two fields holding the bucket algorithm. If the values\nin these two fields differ, an out-of-bounds access can occur. This is\nthe case because the first algorithm field (alg) is used to allocate\nthe correct amount of memory for a bucket of this type, while the second\nalgorithm field inside the bucket (b->alg) is used in the subsequent\nprocessing.\n\nThis patch fixes the issue by adding a check that compares alg and\nb->alg and aborts the processing in case they differ. Furthermore,\nb->alg is set to 0 in this case, because the destruction of the crush\nmap also uses this field to determine the bucket type, which can again\nresult in an out-of-bounds access when trying to free the memory pointed\nto by the fields of the bucket. To correctly free the memory allocated\nfor the bucket in such a case, the corresponding call to kfree is moved\nfrom the algorithm-specific crush_destroy_bucket functions to the\ngeneric crush_destroy_bucket()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ceph/crush/crush.c", "net/ceph/osdmap.c"], "versions": [{"version": "f24e9980eb860d8600cbe5ef3d2fd9295320d229", "lessThan": "6e70ef53e818c53eab28d7b0026b7fd03dddaba5", "status": "affected", "versionType": "git"}, {"version": "f24e9980eb860d8600cbe5ef3d2fd9295320d229", "lessThan": "ebe76d58a48a48031b98543d86c4cd30a825b622", "status": "affected", "versionType": "git"}, {"version": "f24e9980eb860d8600cbe5ef3d2fd9295320d229", "lessThan": 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{}

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