Vulnerability-Lookup

CVE-2023-53493 (GCVE-0-2023-53493)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:45 – Updated: 2026-08-05 09:14

Title

accel/qaic: tighten bounds checking in decode_message()

Summary

In the Linux kernel, the following vulnerability has been resolved: accel/qaic: tighten bounds checking in decode_message() Copy the bounds checking from encode_message() to decode_message(). This patch addresses the following concerns. Ensure that there is enough space for at least one header so that we don't have a negative size later. if (msg_hdr_len < sizeof(*trans_hdr)) Ensure that we have enough space to read the next header from the msg->data. if (msg_len > msg_hdr_len - sizeof(*trans_hdr)) return -EINVAL; Check that the trans_hdr->len is not below the minimum size: if (hdr_len < sizeof(*trans_hdr)) This minimum check ensures that we don't corrupt memory in decode_passthrough() when we do. memcpy(out_trans->data, in_trans->data, len - sizeof(in_trans->hdr)); And finally, use size_add() to prevent an integer overflow: if (size_add(msg_len, hdr_len) > msg_hdr_len)

Severity

8.4 (High)


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

Assigner

Linux mitre root Scorecard

References

2 references

URL	Tags
https://git.kernel.org/stable/c/57d14cb3bae4619ce…
https://git.kernel.org/stable/c/51b56382ed2a2b033…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < 57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd (git) Affected: 129776ac2e38231fa9c02ce20e116c99de291666 , < 51b56382ed2a2b03347372272362b3baa623ed1e (git)	guessed
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.4.7 , ≤ 6.4.* (semver) Unaffected: 6.5 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/qaic/qaic_control.c"
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              "lang": "en",
              "value": "AV:L - The malicious input is the MHI control-channel response emitted by the attached Qualcomm Cloud AI 100 PCIe/M.2 accelerator, so the attack originates from locally-attached hardware or firmware-compromised on-card QSM (the card executes untrusted tenant model workloads in cloud AI deployments), not from any network. This matches the kernel CNA precedent for analogous MHI host-driver bugs (CVE-2023-53598, CVE-2025-39790).\nAC:L - The device has complete, deterministic control over every byte of the response \u2014 magic number, sequence number, `hdr.len`, `hdr.count`, and each `wire_trans_hdr` \u2014 and `decode_message()` consumes it unconditionally; setting `trans_hdr-\u003etype = QAIC_TRANS_PASSTHROUGH_FROM_DEV` with `len = 0` reliably reaches the underflowed `memcpy()` every time, with no race, no timing window, and no memory-layout condition outside the attacker\u0027s influence.\nPR:N - No host account, credential, or capability is needed: `qaic_mhi_probe()` invokes `get_cntl_version()` \u2192 `decode_message()` automatically at device power-up, and `qaic_control_open()` installs `valid_crc_stub` so that first response\u0027s CRC is not even validated. A compromised device can also force re-entry by triggering an MHI SYS_ERROR/reset; on the user-driven path the `QAIC_MANAGE` ioctl carries flags `0` (no `DRM_ROOT_ONLY`, no `DRM_AUTH`), so an unprivileged holder of `/dev/accel/accelN` suffices.\nUI:N - The vulnerable decode runs from the MHI probe path and the control-response workqueue with no victim action required \u2014 no mount, no file open, no administrator step. Device enumeration and driver bring-up alone execute the parser.\nS:U - The out-of-bounds read and the unbounded `memcpy()` write both land in the host kernel\u0027s own heap, the same security authority as the vulnerable driver. No hypervisor, IOMMU, or sandbox boundary is crossed by the corruption itself.\nC:H - Without the `msg_len \u003e msg_hdr_len - sizeof(*trans_hdr)` guard, `trans_hdr` is read past the end of the 4 KB `kmalloc()`\u0027d (not zeroed) response buffer, and `decode_passthrough()` copies out-of-bounds source bytes into `user_msg-\u003edata`, which `qaic_manage_ioctl()` hands straight back via `copy_to_user()` \u2014 a direct kernel-heap disclosure primitive. The same underflowed copy also reads far beyond the source buffer.\nI:H - `memcpy(out_trans-\u003edata, in_trans-\u003edata, len - sizeof(in_trans-\u003ehdr))` with a device-supplied `len \u003c 8` produces a size of ~2^64, giving an out-of-bounds heap write whose source contents are entirely device-controlled, into a destination that in the probe path is a ~32-byte allocation. That is a fully controlled slab overflow suitable for adjacent-object corruption and control-flow hijack.\nA:H - The underflowed `memcpy()` walks off the end of the slab and past the mapped heap, guaranteeing slab corruption, an oops, and a kernel panic; the missing `hdr_len` minimum also permits a zero-advance transaction loop. The attacking device can repeat this on every probe or reset, denying service permanently."
            }
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    "datePublished": "2025-10-01T11:45:44.939Z",
    "dateReserved": "2025-10-01T11:39:39.403Z",
    "dateUpdated": "2026-08-05T09:14:25.393Z",
    "state": "PUBLISHED"
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      "version": "3"
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      "cve": "CVE-2023-53493",
      "id": "CVE-2023-53493",
      "initial_release_date": "2025-10-01T23:30:14Z",
      "product_status:known_affected": "394",
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      "product_status:recommended": "310",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53493",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53493.json",
      "version": "52"
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  }
}

FKIE_CVE-2023-53493

Vulnerability from fkie_nvd - Published: 2025-10-01 12:15 - Updated: 2026-08-04 10:19

Severity

8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/51b56382ed2a2b03347372272362b3baa623ed1e	Patch
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	6.5
linux	linux_kernel	6.5

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/qaic/qaic_control.c"
          ],
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          "vendor": "Linux",
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              "versionType": "git"
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          "versions": [
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            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/qaic: tighten bounds checking in decode_message()\n\nCopy the bounds checking from encode_message() to decode_message().\n\nThis patch addresses the following concerns.  Ensure that there is\nenough space for at least one header so that we don\u0027t have a negative\nsize later.\n\n\tif (msg_hdr_len \u003c sizeof(*trans_hdr))\n\nEnsure that we have enough space to read the next header from the\nmsg-\u003edata.\n\n\tif (msg_len \u003e msg_hdr_len - sizeof(*trans_hdr))\n\t\treturn -EINVAL;\n\nCheck that the trans_hdr-\u003elen is not below the minimum size:\n\n\tif (hdr_len \u003c sizeof(*trans_hdr))\n\nThis minimum check ensures that we don\u0027t corrupt memory in\ndecode_passthrough() when we do.\n\n\tmemcpy(out_trans-\u003edata, in_trans-\u003edata, len - sizeof(in_trans-\u003ehdr));\n\nAnd finally, use size_add() to prevent an integer overflow:\n\n\tif (size_add(msg_len, hdr_len) \u003e msg_hdr_len)"
    }
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  "id": "CVE-2023-53493",
  "lastModified": "2026-08-04T10:19:09.153",
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          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-10-01T12:15:52.540",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/51b56382ed2a2b03347372272362b3baa623ed1e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-2FQ9-3MP7-XW7V

Vulnerability from github – Published: 2025-10-01 12:30 – Updated: 2026-01-16 21:30

Details

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

accel/qaic: tighten bounds checking in decode_message()

Copy the bounds checking from encode_message() to decode_message().

This patch addresses the following concerns. Ensure that there is enough space for at least one header so that we don't have a negative size later.

if (msg_hdr_len < sizeof(*trans_hdr))

Ensure that we have enough space to read the next header from the msg->data.

if (msg_len > msg_hdr_len - sizeof(*trans_hdr))
    return -EINVAL;

Check that the trans_hdr->len is not below the minimum size:

if (hdr_len < sizeof(*trans_hdr))

This minimum check ensures that we don't corrupt memory in decode_passthrough() when we do.

memcpy(out_trans->data, in_trans->data, len - sizeof(in_trans->hdr));

And finally, use size_add() to prevent an integer overflow:

if (size_add(msg_len, hdr_len) > msg_hdr_len)

Severity

7.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2023-53493"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-01T12:15:52Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/qaic: tighten bounds checking in decode_message()\n\nCopy the bounds checking from encode_message() to decode_message().\n\nThis patch addresses the following concerns.  Ensure that there is\nenough space for at least one header so that we don\u0027t have a negative\nsize later.\n\n\tif (msg_hdr_len \u003c sizeof(*trans_hdr))\n\nEnsure that we have enough space to read the next header from the\nmsg-\u003edata.\n\n\tif (msg_len \u003e msg_hdr_len - sizeof(*trans_hdr))\n\t\treturn -EINVAL;\n\nCheck that the trans_hdr-\u003elen is not below the minimum size:\n\n\tif (hdr_len \u003c sizeof(*trans_hdr))\n\nThis minimum check ensures that we don\u0027t corrupt memory in\ndecode_passthrough() when we do.\n\n\tmemcpy(out_trans-\u003edata, in_trans-\u003edata, len - sizeof(in_trans-\u003ehdr));\n\nAnd finally, use size_add() to prevent an integer overflow:\n\n\tif (size_add(msg_len, hdr_len) \u003e msg_hdr_len)",
  "id": "GHSA-2fq9-3mp7-xw7v",
  "modified": "2026-01-16T21:30:30Z",
  "published": "2025-10-01T12:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53493"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51b56382ed2a2b03347372272362b3baa623ed1e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

SUSE-SU-2025:03600-1

Vulnerability from csaf_suse - Published: 2025-10-15 12:54 - Updated: 2026-09-20 17:51

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53493.

CVE-2023-53493

5.5 (Medium)


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

Recommended: 222 products

Open the full advisory

SUSE-SU-2025:03634-1

Vulnerability from csaf_suse - Published: 2025-10-17 14:32 - Updated: 2026-09-20 17:53

Summary

Security update for the Linux Kernel

Severity

Important

Scope

445 vulnerabilities in this advisory, including CVE-2023-53493.

CVE-2023-53493

5.5 (Medium)


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

Recommended: 49 products

Open the full advisory

SUSE-SU-2025:20851-1

Vulnerability from csaf_suse - Published: 2025-10-15 16:17 - Updated: 2026-09-20 18:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53493.

CVE-2023-53493

5.5 (Medium)


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

Recommended: 11 products

Open the full advisory

SUSE-SU-2025:20861-1

Vulnerability from csaf_suse - Published: 2025-10-15 15:17 - Updated: 2026-09-20 18:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53493.

CVE-2023-53493

5.5 (Medium)


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

Recommended: 17 products

Open the full advisory

SUSE-SU-2025:20870-1

Vulnerability from csaf_suse - Published: 2025-10-23 16:01 - Updated: 2026-09-20 18:19

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53493.

CVE-2023-53493

5.5 (Medium)


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

Recommended: 4 products

Open the full advisory

SUSE-SU-2025:20898-1

Vulnerability from csaf_suse - Published: 2025-10-23 13:59 - Updated: 2026-09-20 18:20

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53493.

CVE-2023-53493

5.5 (Medium)


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

Recommended: 7 products

Open the full advisory

SUSE-SU-2025:3751-1

Vulnerability from csaf_suse - Published: 2025-10-23 10:25 - Updated: 2026-09-20 18:24

Summary

Security update for the Linux Kernel

Severity

Important

Scope

346 vulnerabilities in this advisory, including CVE-2023-53493.

CVE-2023-53493

5.5 (Medium)


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

Recommended: 41 products

Open the full advisory

SUSE-SU-2025:4057-1

Vulnerability from csaf_suse - Published: 2025-11-11 18:36 - Updated: 2025-11-11 18:36

Summary

Security update for the Linux Kernel

Severity

Important

Scope

462 vulnerabilities in this advisory, including CVE-2023-53493.

CVE-2023-53493

5.5 (Medium)


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

Recommended: 56 products

Open the full advisory

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.
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.

Action not permitted

CVE-2023-53493 (GCVE-0-2023-53493)

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