CVE-2026-98867 (GCVE-0-2026-98867)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:51 – Updated: 2026-10-18 15:51
VLAI
Title
dm-pcache: bound the logical key offset from persistent memory
Summary
In the Linux kernel, the following vulnerability has been resolved: dm-pcache: bound the logical key offset from persistent memory cache_key_decode() takes a key's logical off from the cache device and later indexes req_key_tree->subtrees[] by it in get_subtree(). An off past the device forms a subtree pointer outside the array, which rb_insert() writes through during replay. Reject a key of zero length, or whose off+len (computed in 64 bits) exceeds the device size, before it is used.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7100 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 3d5a87cb909c1f375f08065b20123fa5db5958d8 (git)
Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 10449703200076980704894c3d68d6796182371b (git)
Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 97fc4b53dbe4a983fdf093243067fa6a64562307 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/md/dm-pcache/cache_key.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: bound the logical key offset from persistent memory\n\ncache_key_decode() takes a key\u0027s logical off from the cache device and\nlater indexes req_key_tree-\u003esubtrees[] by it in get_subtree(). An off\npast the device forms a subtree pointer outside the array, which\nrb_insert() writes through during replay.\n\nReject a key of zero length, or whose off+len (computed in 64 bits)\nexceeds the device size, before it is used."
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      "providerMetadata": {
        "dateUpdated": "2026-10-18T15:51:29.499Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-10-18T15:51:29.499Z",
    "dateReserved": "2026-09-25T10:25:14.377Z",
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    "state": "PUBLISHED"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: bound the logical key offset from persistent memory\n\ncache_key_decode() takes a key\u0027s logical off from the cache device and\nlater indexes req_key_tree-\u003esubtrees[] by it in get_subtree(). An off\npast the device forms a subtree pointer outside the array, which\nrb_insert() writes through during replay.\n\nReject a key of zero length, or whose off+len (computed in 64 bits)\nexceeds the device size, before it is used."
          }
        ],
        "id": "CVE-2026-98867",
        "lastModified": "2026-10-18T16:17:41.220",
        "metrics": {},
        "published": "2026-10-18T16:17:41.220",
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        "vulnStatus": "Received"
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    }
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}



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