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EUVD-2026-345597

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 08:02

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T08:02:59.501062+00:00",
  "id": "EUVD-2026-345597"
}

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

Vulnerability from cvelistv5 – Published: 2024-05-01 05:28 – Updated: 2026-08-05 11:28

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

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

6.3 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-06-06 18:46 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/fe549d8e976300d0d…
https://git.kernel.org/stable/c/19ec82b3cad1abef2…
https://git.kernel.org/stable/c/d0d04efa2e3679216…
https://git.kernel.org/stable/c/4c65507121ea8e0b4…
https://git.kernel.org/stable/c/de1bf25b6d771abdb…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…

Impacted products

2 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) Affected: 5.15.133 , < 5.15.151 (semver) Affected: 6.1.55 , < 6.1.81 (semver) Affected: 6.5.5 , < 6.6 (semver)
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)

Show details on NVD website

JSON

To clipboard

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            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
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              "baseScore": 6.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H",
              "version": "3.1"
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                "options": [
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                    "Exploitation": "none"
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                "role": "CISA Coordinator",
                "timestamp": "2024-06-06T18:46:13.449387Z",
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        ],
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          "dateUpdated": "2024-11-05T15:17:57.462Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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      {
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          "dateUpdated": "2025-11-04T17:16:33.949Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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              "version": "0",
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            },
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ninterconnect: Don\u0027t access req_list while it\u0027s being manipulated\n\nThe icc_lock mutex was split into separate icc_lock and icc_bw_lock\nmutexes in [1] to avoid lockdep splats. However, this didn\u0027t adequately\nprotect access to icc_node::req_list.\n\nThe icc_set_bw() function will eventually iterate over req_list while\nonly holding icc_bw_lock, but req_list can be modified while only\nholding icc_lock. 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\")"
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              "lang": "en",
              "value": "AV:L - The interconnect framework is reached only through local syscall paths \u2014 V4L2 ioctls on /dev/videoN (venus), DRM render-node submissions driving GPU devfreq, block I/O driving UFS/eMMC clock scaling \u2014 all of which require local access to the device. No network-facing protocol handler reaches `icc_set_bw()` or `icc_put()`.\nAC:L - The attacker directly controls the reading side of the race and can spin it in a tight loop (repeated `VIDIOC_STREAMON`/`STREAMOFF` on /dev/videoN, or continuous GPU/IO load forcing OPP bandwidth transitions), so the `req_list` walk in `aggregate_requests()` can be issued arbitrarily often against recurring `path_init()`/`icc_put()` mutations, with unlimited retries and no condition outside the attacker\u0027s influence gating success.\nPR:L - An ordinary unprivileged local account suffices \u2014 access to /dev/videoN (video/media group, or any app on Android), /dev/dri/renderD128, or simply generating filesystem I/O is enough to drive `icc_set_bw()` into `aggregate_requests()`. No capability, root, or namespace privilege is required.\nUI:N - The attacker\u0027s own process triggers both the bandwidth-vote storm and the racing condition entirely on its own. No victim action, no file to open, no filesystem to mount.\nS:U - The corruption is confined to kernel heap objects and interconnect provider state within the same kernel security authority. There is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The list walk continues through a `kfree()`d `struct icc_path` from a general-purpose kmalloc cache, so a sprayed `req_node.next` steers subsequent iterations to arbitrary kernel addresses, reading `enabled`/`tag`/`avg_bw`/`peak_bw` from them; those values surface in `node-\u003eavg_bw`/`peak_bw`, giving a use-after-free based arbitrary-read primitive.\nI:H - This is a use-after-free plus hlist corruption on a `GFP_KERNEL` kmalloc object, which is a standard heap-spray and write-primitive foundation; concretely, garbage read from freed memory is aggregated into `node-\u003eavg_bw`/`peak_bw` and programmed into interconnect hardware through `apply_constraints()` \u2192 `p-\u003eset()`, corrupting system bus configuration.\nA:H - `icc_put()` uses `hlist_del()` (leaving `LIST_POISON1` in `next`) immediately followed by `kfree(path)`, so a racing `hlist_for_each_entry()` dereferences a poison or dangling pointer and oopses/panics the kernel; `hlist_add_head()` racing the same walk can likewise send it into a corrupted chain."
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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EUVD-2026-345597

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

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