Vulnerability-Lookup

GHSA-H9W8-48V5-M9C9

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 15:31

Details

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

drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()

The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8 bytes via memset without checking the buffer size parameter. This allows unprivileged userspace to trigger an out-of bounds kernel memory write by passing a small buffer, leading to potential privilege escalation.

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-2026-43206"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:39Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()\n\nThe kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8\nbytes via memset without checking the buffer size parameter. This allows\nunprivileged userspace to trigger an out-of bounds kernel memory write\nby passing a small buffer, leading to  potential privilege\nescalation.",
  "id": "GHSA-h9w8-48v5-m9c9",
  "modified": "2026-05-08T15:31:17Z",
  "published": "2026-05-06T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43206"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e04bc310d80b46eaf481f1fefcbcb37a187412d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4857c37c7ba9aa38b9a4c694e8bd8d0091c87940"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e72f419e4ed44cb3b60506752d8688c20a60a9b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75fb57efdd7863fffbc39db23e9cad7aafda26ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a70a26c9f34baea6c3199a9862ddaff4554a96d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4034442cb090e4a980bdcc1540948606cbc951b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f"
    }
  ],
  "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"
    }
  ]
}

CVE-2026-43206 (GCVE-0-2026-43206)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-08-05 12:26

Title

drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8 bytes via memset without checking the buffer size parameter. This allows unprivileged userspace to trigger an out-of bounds kernel memory write by passing a small buffer, leading to potential privilege escalation.

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/3e04bc310d80b46ea…
https://git.kernel.org/stable/c/de8d7a25cd2eb5875…
https://git.kernel.org/stable/c/b4034442cb090e4a9…
https://git.kernel.org/stable/c/4857c37c7ba9aa38b…
https://git.kernel.org/stable/c/75fb57efdd7863fff…
https://git.kernel.org/stable/c/bfcd6b53e1f4feb18…
https://git.kernel.org/stable/c/4e72f419e4ed44cb3…
https://git.kernel.org/stable/c/8a70a26c9f34baea6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0fc8011f89feb8b2c3008583b777d097e1974660 , < 3e04bc310d80b46eaf481f1fefcbcb37a187412d (git) Affected: 0fc8011f89feb8b2c3008583b777d097e1974660 , < de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f (git) Affected: 0fc8011f89feb8b2c3008583b777d097e1974660 , < b4034442cb090e4a980bdcc1540948606cbc951b (git) Affected: 0fc8011f89feb8b2c3008583b777d097e1974660 , < 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940 (git) Affected: 0fc8011f89feb8b2c3008583b777d097e1974660 , < 75fb57efdd7863fffbc39db23e9cad7aafda26ed (git) Affected: 0fc8011f89feb8b2c3008583b777d097e1974660 , < bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b (git) Affected: 0fc8011f89feb8b2c3008583b777d097e1974660 , < 4e72f419e4ed44cb3b60506752d8688c20a60a9b (git) Affected: 0fc8011f89feb8b2c3008583b777d097e1974660 , < 8a70a26c9f34baea6c3199a9862ddaff4554a96d (git)
Linux	Linux	Affected: 4.17 Unaffected: 0 , < 4.17 (semver) Unaffected: 5.10.252 , ≤ 5.10.* (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_events.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3e04bc310d80b46eaf481f1fefcbcb37a187412d",
              "status": "affected",
              "version": "0fc8011f89feb8b2c3008583b777d097e1974660",
              "versionType": "git"
            },
            {
              "lessThan": "de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f",
              "status": "affected",
              "version": "0fc8011f89feb8b2c3008583b777d097e1974660",
              "versionType": "git"
            },
            {
              "lessThan": "b4034442cb090e4a980bdcc1540948606cbc951b",
              "status": "affected",
              "version": "0fc8011f89feb8b2c3008583b777d097e1974660",
              "versionType": "git"
            },
            {
              "lessThan": "4857c37c7ba9aa38b9a4c694e8bd8d0091c87940",
              "status": "affected",
              "version": "0fc8011f89feb8b2c3008583b777d097e1974660",
              "versionType": "git"
            },
            {
              "lessThan": "75fb57efdd7863fffbc39db23e9cad7aafda26ed",
              "status": "affected",
              "version": "0fc8011f89feb8b2c3008583b777d097e1974660",
              "versionType": "git"
            },
            {
              "lessThan": "bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b",
              "status": "affected",
              "version": "0fc8011f89feb8b2c3008583b777d097e1974660",
              "versionType": "git"
            },
            {
              "lessThan": "4e72f419e4ed44cb3b60506752d8688c20a60a9b",
              "status": "affected",
              "version": "0fc8011f89feb8b2c3008583b777d097e1974660",
              "versionType": "git"
            },
            {
              "lessThan": "8a70a26c9f34baea6c3199a9862ddaff4554a96d",
              "status": "affected",
              "version": "0fc8011f89feb8b2c3008583b777d097e1974660",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdkfd/kfd_events.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.17"
            },
            {
              "lessThan": "4.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.252",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "4.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()\n\nThe kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8\nbytes via memset without checking the buffer size parameter. This allows\nunprivileged userspace to trigger an out-of bounds kernel memory write\nby passing a small buffer, leading to  potential privilege\nescalation."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is reached through local `/dev/kfd` ioctls, specifically allocating a KFD GPU memory object and passing its handle as `event_page_offset` to `AMDKFD_IOC_CREATE_EVENT`. There is no network, adjacent, or physical packet/device-input path.\nAC:L - The attacker controls the supplied event-page handle and can allocate a buffer smaller than `KFD_SIGNAL_EVENT_LIMIT * 8`, making the fixed-size `memset` out-of-bounds deterministic. No race or external condition is required.\nPR:L - The path is available to unprivileged userspace with access to KFD/AMDGPU device nodes, and the relevant ioctls have no capability flag or `capable()` gate. This is low privilege, not real administrator privilege.\nUI:N - Once a local attacker can execute code and open the device, exploitation only requires issuing ioctls. No victim user action is needed.\nS:U - The corruption occurs inside the kernel driver and impacts the same kernel security authority. This is standard local kernel compromise/DoS, not a cross-scope escape such as guest-to-host or IOMMU boundary bypass.\nC:H - The bug is an out-of-bounds kernel write into memory adjacent to a kernel-mapped GPU buffer, and kernel memory corruption can reasonably be leveraged to disclose sensitive kernel memory. Following the higher-severity rule for memory corruption, confidentiality impact is High.\nI:H - The vulnerable `memset` writes attacker-triggered data beyond the allocated object, giving a kernel memory corruption primitive. Out-of-bounds writes are scored as High integrity impact because they can plausibly be developed into privilege escalation or control-flow/data corruption.\nA:H - The out-of-bounds kernel write can corrupt adjacent kernel memory and readily crash or destabilize the kernel even without full exploitation. Kernel oops, panic, or persistent GPU/kernel failure is a High availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:26:33.242Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3e04bc310d80b46eaf481f1fefcbcb37a187412d"
        },
        {
          "url": "https://git.kernel.org/stable/c/de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4034442cb090e4a980bdcc1540948606cbc951b"
        },
        {
          "url": "https://git.kernel.org/stable/c/4857c37c7ba9aa38b9a4c694e8bd8d0091c87940"
        },
        {
          "url": "https://git.kernel.org/stable/c/75fb57efdd7863fffbc39db23e9cad7aafda26ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e72f419e4ed44cb3b60506752d8688c20a60a9b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a70a26c9f34baea6c3199a9862ddaff4554a96d"
        }
      ],
      "title": "drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43206",
    "datePublished": "2026-05-06T11:28:10.937Z",
    "dateReserved": "2026-05-01T14:12:55.993Z",
    "dateUpdated": "2026-08-05T12:26:33.242Z",
    "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.