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 (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
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)
Create a notification for this product.
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      "id": "CVE-2024-36966",
      "initial_release_date": "2024-06-11T02:05:34Z",
      "product_status:known_not_affected": "283",
      "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": "17"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f9b877a7ee312ec8ce17598a7ef85cb820d7c371\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/dcdd49701e429c55b3644fd70fc58d85745f8cfe\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T03:43:50.363Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-36966\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-12T19:01:23.136909Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-12T19:01:31.564Z\"}}], \"cna\": {\"title\": \"erofs: reliably distinguish block based and fscache mode\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"aca740cecbe57b12bd9c1fc632092af5ebacda0c\", \"lessThan\": \"f9b877a7ee312ec8ce17598a7ef85cb820d7c371\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"aca740cecbe57b12bd9c1fc632092af5ebacda0c\", \"lessThan\": \"dcdd49701e429c55b3644fd70fc58d85745f8cfe\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"aca740cecbe57b12bd9c1fc632092af5ebacda0c\", \"lessThan\": \"7af2ae1b1531feab5d38ec9c8f472dc6cceb4606\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/erofs/super.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.32\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/erofs/super.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f9b877a7ee312ec8ce17598a7ef85cb820d7c371\"}, {\"url\": \"https://git.kernel.org/stable/c/dcdd49701e429c55b3644fd70fc58d85745f8cfe\"}, {\"url\": \"https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.32\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.11\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"6.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:18:02.971Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-36966\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:18:02.971Z\", \"dateReserved\": \"2024-05-30T15:25:07.081Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-08T12:52:59.148Z\", \"assignerShortName\": \"Linux\"}",
      "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

Author Source Type Date Other

Nomenclature

  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.