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HighFix available

regmap: maple: Fix cache corruption in regcache_maple_drop()

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: regmap: maple: Fix cache corruption in regcache_maple_drop() When keeping the upper end of a cache block entry, the entry[] array must be indexed by the offset from the base register of the block, i.e. max - mas.index. The code was indexing entry[] by only the register address, leading to an out-of-bounds access that copied some part of the kernel memory over the cache contents. This bug was not detected by the regmap KUnit test because it only tests with a block of registers starting at 0, so mas.index == 0.

Products
Kernel
Affected versions
Not specified
Fixed versions
6.6.26, 6.8.5
CVEs
CVE-2024-36019
Confirmed fixed CVEs
Not specified
Updated in this feed
6 Nov 2026, 02:52 UTC · Revision 1

Source evidence

regmap: maple: Fix cache corruption in regcache_maple_drop()

core-osv · Original source

Published 30 May 2024, 14:59 UTC

In the Linux kernel, the following vulnerability has been resolved: regmap: maple: Fix cache corruption in regcache_maple_drop() When keeping the upper end of a cache block entry, the entry[] array must be indexed by the offset from the base register of the block, i.e. max - mas.index. The code was indexing entry[] by only the register address, leading to an out-of-bounds access that copied some part of the kernel memory over the cache contents. This bug was not detected by the regmap KUnit test because it only tests with a block of registers starting at 0, so mas.index == 0.

osv:CVE-2024-36019

Kernel

Fixed versions: 6.6.26, 6.8.5

Complete source record
{
  "id": "d2d97b2e44817faca95cf15ae01221b209e00ae0a527d30482004182e77e3937",
  "url": "https://osv.dev/vulnerability/CVE-2024-36019",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "regmap: maple: Fix cache corruption in regcache_maple_drop()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: regmap: maple: Fix cache corruption in regcache_maple_drop() When keeping the upper end of a cache block entry, the entry[] array must be indexed by the offset from the base register of the block, i.e. max - mas.index. The code was indexing entry[] by only the register address, leading to an out-of-bounds access that copied some part of the kernel memory over the cache contents. This bug was not detected by the regmap KUnit test because it only tests with a block of registers starting at 0, so mas.index == 0.",
    "evidence": "osv:CVE-2024-36019",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.26",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.8.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-36019",
      "aliases": [
        "CVE-2024-36019"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
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              "type": "GIT",
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                {
                  "fixed": "3af6c5ac72dc5b721058132a0a1d7779e443175e"
                },
                {
                  "fixed": "51c4440b9d3fd7c8234e6de9170a487c03506e53"
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                {
                  "fixed": "00bb549d7d63a21532e76e4a334d7807a54d9f31"
                }
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          ],
          "database_specific": {
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          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.4.0"
                },
                {
                  "fixed": "6.6.26"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.8.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-36019.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.711763290Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/00bb549d7d63a21532e76e4a334d7807a54d9f31",
        "https://git.kernel.org/stable/c/3af6c5ac72dc5b721058132a0a1d7779e443175e",
        "https://git.kernel.org/stable/c/51c4440b9d3fd7c8234e6de9170a487c03506e53",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36019.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-36019",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/36xxx/CVE-2024-36019.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-36019",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 514440,
  "published_at": "2024-05-30T14:59:42.84+00:00"
}