Vulnerability-Lookup

GHSA-QP63-W47Q-G9VJ

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2024-12-24 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

usb: dwc3: ep0: fix NULL pointer exception

There is no validation of the index from dwc3_wIndex_to_dep() and we might be referring a non-existing ep and trigger a NULL pointer exception. In certain configurations we might use fewer eps and the index might wrongly indicate a larger ep index than existing.

By adding this validation from the patch we can actually report a wrong index back to the caller.

In our usecase we are using a composite device on an older kernel, but upstream might use this fix also. Unfortunately, I cannot describe the hardware for others to reproduce the issue as it is a proprietary implementation.

[ 82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4 [ 82.966891] Mem abort info: [ 82.969663] ESR = 0x96000006 [ 82.972703] Exception class = DABT (current EL), IL = 32 bits [ 82.978603] SET = 0, FnV = 0 [ 82.981642] EA = 0, S1PTW = 0 [ 82.984765] Data abort info: [ 82.987631] ISV = 0, ISS = 0x00000006 [ 82.991449] CM = 0, WnR = 0 [ 82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc [ 83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000 [ 83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP [ 83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c) [ 83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1 [ 83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO) [ 83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c [ 83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94

...

[ 83.141788] Call trace: [ 83.144227] dwc3_ep0_handle_feature+0x414/0x43c [ 83.148823] dwc3_ep0_interrupt+0x3b4/0xc94 [ 83.181546] ---[ end trace aac6b5267d84c32f ]---

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47269"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:15Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: ep0: fix NULL pointer exception\n\nThere is no validation of the index from dwc3_wIndex_to_dep() and we might\nbe referring a non-existing ep and trigger a NULL pointer exception. In\ncertain configurations we might use fewer eps and the index might wrongly\nindicate a larger ep index than existing.\n\nBy adding this validation from the patch we can actually report a wrong\nindex back to the caller.\n\nIn our usecase we are using a composite device on an older kernel, but\nupstream might use this fix also. Unfortunately, I cannot describe the\nhardware for others to reproduce the issue as it is a proprietary\nimplementation.\n\n[   82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4\n[   82.966891] Mem abort info:\n[   82.969663]   ESR = 0x96000006\n[   82.972703]   Exception class = DABT (current EL), IL = 32 bits\n[   82.978603]   SET = 0, FnV = 0\n[   82.981642]   EA = 0, S1PTW = 0\n[   82.984765] Data abort info:\n[   82.987631]   ISV = 0, ISS = 0x00000006\n[   82.991449]   CM = 0, WnR = 0\n[   82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc\n[   83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000\n[   83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP\n[   83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c)\n[   83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1\n[   83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO)\n[   83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c\n[   83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94\n\n...\n\n[   83.141788] Call trace:\n[   83.144227]  dwc3_ep0_handle_feature+0x414/0x43c\n[   83.148823]  dwc3_ep0_interrupt+0x3b4/0xc94\n[   83.181546] ---[ end trace aac6b5267d84c32f ]---",
  "id": "GHSA-qp63-w47q-g9vj",
  "modified": "2024-12-24T18:30:48Z",
  "published": "2024-05-21T15:31:41Z",
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}

CVE-2021-47269 (GCVE-0-2021-47269)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:19 – Updated: 2026-05-11 13:51

Title

usb: dwc3: ep0: fix NULL pointer exception

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: ep0: fix NULL pointer exception There is no validation of the index from dwc3_wIndex_to_dep() and we might be referring a non-existing ep and trigger a NULL pointer exception. In certain configurations we might use fewer eps and the index might wrongly indicate a larger ep index than existing. By adding this validation from the patch we can actually report a wrong index back to the caller. In our usecase we are using a composite device on an older kernel, but upstream might use this fix also. Unfortunately, I cannot describe the hardware for others to reproduce the issue as it is a proprietary implementation. [ 82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4 [ 82.966891] Mem abort info: [ 82.969663] ESR = 0x96000006 [ 82.972703] Exception class = DABT (current EL), IL = 32 bits [ 82.978603] SET = 0, FnV = 0 [ 82.981642] EA = 0, S1PTW = 0 [ 82.984765] Data abort info: [ 82.987631] ISV = 0, ISS = 0x00000006 [ 82.991449] CM = 0, WnR = 0 [ 82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc [ 83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000 [ 83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP [ 83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c) [ 83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1 [ 83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO) [ 83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c [ 83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94 ... [ 83.141788] Call trace: [ 83.144227] dwc3_ep0_handle_feature+0x414/0x43c [ 83.148823] dwc3_ep0_interrupt+0x3b4/0xc94 [ 83.181546] ---[ end trace aac6b5267d84c32f ]---

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:39 UTC

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/96b74a99d360235c2…
https://git.kernel.org/stable/c/60156089f07e724e4…
https://git.kernel.org/stable/c/990dc90750772622d…
https://git.kernel.org/stable/c/bd551e7c85939de21…
https://git.kernel.org/stable/c/366369b89bedd59b1…
https://git.kernel.org/stable/c/470403639114895e2…
https://git.kernel.org/stable/c/788755756dd4a6aba…
https://git.kernel.org/stable/c/d00889080ab600516…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 96b74a99d360235c24052f1d060e64ac53f43528 (git) Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 60156089f07e724e4dc8483702d5e1ede4522749 (git) Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 990dc90750772622d44ca2ea6652c521e6f67e16 (git) Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < bd551e7c85939de2182010273450bfa78c3742fc (git) Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 366369b89bedd59b1425386e8d4a18a466e420e4 (git) Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 470403639114895e2697c766fbe17be8d0e9b67a (git) Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < 788755756dd4a6aba1de479fec20b0fa600e7f19 (git) Affected: 6a1e3ef45fb0c4d79cbb5190c8fc59263c630b0e , < d00889080ab60051627dab1d85831cd9db750e2a (git)
Linux	Linux	Affected: 3.10 Unaffected: 0 , < 3.10 (semver) Unaffected: 4.4.273 , ≤ 4.4.* (semver) Unaffected: 4.9.273 , ≤ 4.9.* (semver) Unaffected: 4.14.237 , ≤ 4.14.* (semver) Unaffected: 4.19.195 , ≤ 4.19.* (semver) Unaffected: 5.4.126 , ≤ 5.4.* (semver) Unaffected: 5.10.44 , ≤ 5.10.* (semver) Unaffected: 5.12.11 , ≤ 5.12.* (semver) Unaffected: 5.13 , ≤ * (original_commit_for_fix)

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        },
        {
          "url": "https://git.kernel.org/stable/c/bd551e7c85939de2182010273450bfa78c3742fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/366369b89bedd59b1425386e8d4a18a466e420e4"
        },
        {
          "url": "https://git.kernel.org/stable/c/470403639114895e2697c766fbe17be8d0e9b67a"
        },
        {
          "url": "https://git.kernel.org/stable/c/788755756dd4a6aba1de479fec20b0fa600e7f19"
        },
        {
          "url": "https://git.kernel.org/stable/c/d00889080ab60051627dab1d85831cd9db750e2a"
        }
      ],
      "title": "usb: dwc3: ep0: fix NULL pointer exception",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47269",
    "datePublished": "2024-05-21T14:19:59.207Z",
    "dateReserved": "2024-05-21T13:27:52.127Z",
    "dateUpdated": "2026-05-11T13:51:14.532Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.