CVE-2024-27005 (GCVE-0-2024-27005)

Vulnerability from cvelistv5 – Published: 2024-05-01 05:28 – Updated: 2025-12-23 16:40
VLAI?
Title
interconnect: Don't access req_list while it's being manipulated
Summary
In the Linux kernel, the following vulnerability has been resolved: interconnect: Don't access req_list while it's being manipulated The icc_lock mutex was split into separate icc_lock and icc_bw_lock mutexes in [1] to avoid lockdep splats. However, this didn't adequately protect access to icc_node::req_list. The icc_set_bw() function will eventually iterate over req_list while only holding icc_bw_lock, but req_list can be modified while only holding icc_lock. This causes races between icc_set_bw(), of_icc_get(), and icc_put(). Example A: CPU0 CPU1 ---- ---- icc_set_bw(path_a) mutex_lock(&icc_bw_lock); icc_put(path_b) mutex_lock(&icc_lock); aggregate_requests() hlist_for_each_entry(r, ... hlist_del(... <r = invalid pointer> Example B: CPU0 CPU1 ---- ---- icc_set_bw(path_a) mutex_lock(&icc_bw_lock); path_b = of_icc_get() of_icc_get_by_index() mutex_lock(&icc_lock); path_find() path_init() aggregate_requests() hlist_for_each_entry(r, ... hlist_add_head(... <r = invalid pointer> Fix this by ensuring icc_bw_lock is always held before manipulating icc_node::req_list. The additional places icc_bw_lock is held don't perform any memory allocations, so we should still be safe from the original lockdep splats that motivated the separate locks. [1] commit af42269c3523 ("interconnect: Fix locking for runpm vs reclaim")
Severity ?
6.3 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9be2957f014d91088db1eb5dd09d9a03d7184dce , < fe549d8e976300d0dd75bd904eb216bed8b145e0 (git)
Affected: ee42bfc791aa3cd78e29046f26a09d189beb3efb , < 19ec82b3cad1abef2a929262b8c1528f4e0c192d (git)
Affected: af42269c3523492d71ebbe11fefae2653e9cdc78 , < d0d04efa2e367921654b5106cc5c05e3757c2b42 (git)
Affected: af42269c3523492d71ebbe11fefae2653e9cdc78 , < 4c65507121ea8e0b47fae6d2049c8688390d46b6 (git)
Affected: af42269c3523492d71ebbe11fefae2653e9cdc78 , < de1bf25b6d771abdb52d43546cf57ad775fb68a1 (git)
Affected: 2f3a124696d43de3c837f87a9f767c56ee86cf2a (git)
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    Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 5.15.151 , ≤ 5.15.* (semver)
Unaffected: 6.1.81 , ≤ 6.1.* (semver)
Unaffected: 6.6.29 , ≤ 6.6.* (semver)
Unaffected: 6.8.8 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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This causes races between icc_set_bw(), of_icc_get(),\\nand icc_put().\\n\\nExample A:\\n\\n  CPU0                               CPU1\\n  ----                               ----\\n  icc_set_bw(path_a)\\n    mutex_lock(\u0026icc_bw_lock);\\n                                     icc_put(path_b)\\n                                       mutex_lock(\u0026icc_lock);\\n    aggregate_requests()\\n      hlist_for_each_entry(r, ...\\n                                       hlist_del(...\\n        \u003cr = invalid pointer\u003e\\n\\nExample B:\\n\\n  CPU0                               CPU1\\n  ----                               ----\\n  icc_set_bw(path_a)\\n    mutex_lock(\u0026icc_bw_lock);\\n                                     path_b = of_icc_get()\\n                                       of_icc_get_by_index()\\n                                         mutex_lock(\u0026icc_lock);\\n                                         path_find()\\n                                           path_init()\\n    aggregate_requests()\\n      hlist_for_each_entry(r, ...\\n                                             hlist_add_head(...\\n        \u003cr = invalid pointer\u003e\\n\\nFix this by ensuring icc_bw_lock is always held before manipulating\\nicc_node::req_list. The additional places icc_bw_lock is held don\u0027t\\nperform any memory allocations, so we should still be safe from the\\noriginal lockdep splats that motivated the separate locks.\\n\\n[1] commit af42269c3523 (\\\"interconnect: Fix locking for runpm vs reclaim\\\")\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.151\", \"versionStartIncluding\": \"5.15.133\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.81\", \"versionStartIncluding\": \"6.1.55\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.29\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.8\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"6.5.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-23T16:40:04.791Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-27005\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-23T16:40:04.791Z\", \"dateReserved\": \"2024-02-19T14:20:24.207Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-01T05:28:59.193Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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 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.