CVE-2024-36966 (GCVE-0-2024-36966)

Vulnerability from cvelistv5 – Published: 2024-06-08 12:52 – Updated: 2026-05-11 20:18
VLAI
Title
erofs: reliably distinguish block based and fscache mode
Summary
In the Linux kernel, the following vulnerability has been resolved: erofs: reliably distinguish block based and fscache mode When erofs_kill_sb() is called in block dev based mode, s_bdev may not have been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled, it will be mistaken for fscache mode, and then attempt to free an anon_dev that has never been allocated, triggering the following warning: ============================================ ida_free called for id=0 which is not allocated. WARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140 Modules linked in: CPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630 RIP: 0010:ida_free+0x134/0x140 Call Trace: <TASK> erofs_kill_sb+0x81/0x90 deactivate_locked_super+0x35/0x80 get_tree_bdev+0x136/0x1e0 vfs_get_tree+0x2c/0xf0 do_new_mount+0x190/0x2f0 [...] ============================================ Now when erofs_kill_sb() is called, erofs_sb_info must have been initialised, so use sbi->fsid to distinguish between the two modes.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-12 19:01 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: aca740cecbe57b12bd9c1fc632092af5ebacda0c , < f9b877a7ee312ec8ce17598a7ef85cb820d7c371 (git)
Affected: aca740cecbe57b12bd9c1fc632092af5ebacda0c , < dcdd49701e429c55b3644fd70fc58d85745f8cfe (git)
Affected: aca740cecbe57b12bd9c1fc632092af5ebacda0c , < 7af2ae1b1531feab5d38ec9c8f472dc6cceb4606 (git)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.32 , ≤ 6.6.* (semver)
Unaffected: 6.8.11 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                "value": "CWE-824"
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            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
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    },
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      "current_release_date": "2025-11-21T10:46:52+00:00",
      "cve": "CVE-2024-36966",
      "id": "CVE-2024-36966",
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      "product_status:known_affected": "108",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: erofs: reliably distinguish block based and fscache mode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-36966.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-08-29T01:54:06Z",
      "cve": "CVE-2024-36966",
      "id": "CVE-2024-36966",
      "initial_release_date": "2024-06-11T02:05:34Z",
      "product_status:known_not_affected": "385",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-36966",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-36966.json",
      "version": "19"
    },
    "vulnrichment": {
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              "dateUpdated": "2024-08-02T03:43:50.363Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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                "url": "https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606"
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            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-36966",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
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                    "role": "CISA Coordinator",
                    "timestamp": "2024-06-12T19:01:23.136909Z",
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              "shortName": "CISA-ADP"
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            "title": "CISA ADP Vulnrichment"
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              "product": "Linux",
              "programFiles": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "versions": [
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                  "version": "0",
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                  "version": "6.8.11",
                  "versionType": "semver"
                },
                {
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                  "status": "unaffected",
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                  "versionType": "original_commit_for_fix"
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                      "versionStartIncluding": "6.6",
                      "vulnerable": true
                    },
                    {
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                  ],
                  "negate": false,
                  "operator": "OR"
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          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: reliably distinguish block based and fscache mode\n\nWhen erofs_kill_sb() is called in block dev based mode, s_bdev may not\nhave been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled,\nit will be mistaken for fscache mode, and then attempt to free an anon_dev\nthat has never been allocated, triggering the following warning:\n\n============================================\nida_free called for id=0 which is not allocated.\nWARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140\nModules linked in:\nCPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630\nRIP: 0010:ida_free+0x134/0x140\nCall Trace:\n \u003cTASK\u003e\n erofs_kill_sb+0x81/0x90\n deactivate_locked_super+0x35/0x80\n get_tree_bdev+0x136/0x1e0\n vfs_get_tree+0x2c/0xf0\n do_new_mount+0x190/0x2f0\n [...]\n============================================\n\nNow when erofs_kill_sb() is called, erofs_sb_info must have been\ninitialised, so use sbi-\u003efsid to distinguish between the two modes."
            }
          ],
          "providerMetadata": {
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              "url": "https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606"
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          ],
          "title": "erofs: reliably distinguish block based and fscache mode",
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          }
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      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-36966",
        "datePublished": "2024-06-08T12:52:59.148Z",
        "dateReserved": "2024-05-30T15:25:07.081Z",
        "dateUpdated": "2026-05-11T20:18:02.971Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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  • 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.
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  • 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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.