CVE-2026-93211 (GCVE-0-2026-93211)
Vulnerability from cvelistv5
Published
2026-09-24 15:10
Modified
2026-10-19 09:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nfsd: initialize DRC hash table before registering shrinker shrinker_register() precedes the INIT_LIST_HEAD loop and the drc_hashsize store. On weakly-ordered architectures (arm64, ppc), a shrinker scan can observe drc_hashsize before the bucket list heads are initialized, causing a NULL deref in the DRC shrinker callback. Move bucket initialization and the drc_hashsize store before shrinker_register() so the hash table is fully initialized before it becomes visible to the shrinker.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7
Version: 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7
Version: 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7
Version: 8eea99a81c6f67c08fedd7db2ccd09aa93db69a7
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfscache.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f060f43a67635dbb393bf5dcbfc3e8b9a44942cb",
              "status": "affected",
              "version": "8eea99a81c6f67c08fedd7db2ccd09aa93db69a7",
              "versionType": "git"
            },
            {
              "lessThan": "b57bd8cb739cb3cf88bdb1a5903a42a707a5c282",
              "status": "affected",
              "version": "8eea99a81c6f67c08fedd7db2ccd09aa93db69a7",
              "versionType": "git"
            },
            {
              "lessThan": "431c70ca5163c98c746f22f16cd58ca5aefec6dc",
              "status": "affected",
              "version": "8eea99a81c6f67c08fedd7db2ccd09aa93db69a7",
              "versionType": "git"
            },
            {
              "lessThan": "b0c58934f5cc4f05b63ef6605dd10c1d0d489e88",
              "status": "affected",
              "version": "8eea99a81c6f67c08fedd7db2ccd09aa93db69a7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfscache.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: initialize DRC hash table before registering shrinker\n\nshrinker_register() precedes the INIT_LIST_HEAD loop and the\ndrc_hashsize store. On weakly-ordered architectures (arm64, ppc),\na shrinker scan can observe drc_hashsize before the bucket list\nheads are initialized, causing a NULL deref in the DRC shrinker\ncallback.\n\nMove bucket initialization and the drc_hashsize store before\nshrinker_register() so the hash table is fully initialized before\nit becomes visible to the shrinker."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:07:23.361Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f060f43a67635dbb393bf5dcbfc3e8b9a44942cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/b57bd8cb739cb3cf88bdb1a5903a42a707a5c282"
        },
        {
          "url": "https://git.kernel.org/stable/c/431c70ca5163c98c746f22f16cd58ca5aefec6dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/b0c58934f5cc4f05b63ef6605dd10c1d0d489e88"
        }
      ],
      "title": "nfsd: initialize DRC hash table before registering shrinker",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93211",
    "datePublished": "2026-09-24T15:10:34.407Z",
    "dateReserved": "2026-09-17T16:02:15.093Z",
    "dateUpdated": "2026-10-19T09:07:23.361Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.