Vulnerability-Lookup

GHSA-FWGV-MC92-549X

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-29 09:30

Details

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

i2c: amd-mp2: Unregister callback on adapter add failure

amd_mp2_register_cb() stores the platform I2C context in the MP2 PCI driver's callback table before the adapter is registered. If i2c_add_adapter() fails, probe returns and devres frees the context, but the PCI driver can still dereference the stale pointer from its IRQ and system-sleep callbacks.

Unregister the callback before returning the adapter registration error.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80680"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:53Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: amd-mp2: Unregister callback on adapter add failure\n\namd_mp2_register_cb() stores the platform I2C context in the MP2 PCI\ndriver\u0027s callback table before the adapter is registered. If\ni2c_add_adapter() fails, probe returns and devres frees the context,\nbut the PCI driver can still dereference the stale pointer from its IRQ\nand system-sleep callbacks.\n\nUnregister the callback before returning the adapter registration error.",
  "id": "GHSA-fwgv-mc92-549x",
  "modified": "2026-08-29T09:30:28Z",
  "published": "2026-08-28T09:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80680"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1883a09a37fed497b9efacf736c23624a472246b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f7789b3a9628819ebf90bcba8f9da3c139f8687"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4786d4d70dcd1e6b7e044f2348e00f201947b69c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82048795242f04275a3f49ffc66ad851b6120954"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bf719659406e4a1b56d441e0c7da2085d891d96"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9142a3dcff0d80a3a24ce159aee19ddc869d9784"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b7c2c5c8868737926410b93d1223ada17625ead3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf107c5983dc70fcf932a305581a5f976d908ff1"
    }
  ],
  "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-2026-80680 (GCVE-0-2026-80680)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:52 – Updated: 2026-08-29 06:22

Title

i2c: amd-mp2: Unregister callback on adapter add failure

Summary

In the Linux kernel, the following vulnerability has been resolved: i2c: amd-mp2: Unregister callback on adapter add failure amd_mp2_register_cb() stores the platform I2C context in the MP2 PCI driver's callback table before the adapter is registered. If i2c_add_adapter() fails, probe returns and devres frees the context, but the PCI driver can still dereference the stale pointer from its IRQ and system-sleep callbacks. Unregister the callback before returning the adapter registration error.

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/9142a3dcff0d80a3a…
https://git.kernel.org/stable/c/2f7789b3a9628819e…
https://git.kernel.org/stable/c/4786d4d70dcd1e6b7…
https://git.kernel.org/stable/c/b7c2c5c8868737926…
https://git.kernel.org/stable/c/cf107c5983dc70fcf…
https://git.kernel.org/stable/c/1883a09a37fed497b…
https://git.kernel.org/stable/c/8bf719659406e4a1b…
https://git.kernel.org/stable/c/82048795242f04275…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 529766e0a0114438887382a68d97341fbf8349fb , < 9142a3dcff0d80a3a24ce159aee19ddc869d9784 (git) Affected: 529766e0a0114438887382a68d97341fbf8349fb , < 2f7789b3a9628819ebf90bcba8f9da3c139f8687 (git) Affected: 529766e0a0114438887382a68d97341fbf8349fb , < 4786d4d70dcd1e6b7e044f2348e00f201947b69c (git) Affected: 529766e0a0114438887382a68d97341fbf8349fb , < b7c2c5c8868737926410b93d1223ada17625ead3 (git) Affected: 529766e0a0114438887382a68d97341fbf8349fb , < cf107c5983dc70fcf932a305581a5f976d908ff1 (git) Affected: 529766e0a0114438887382a68d97341fbf8349fb , < 1883a09a37fed497b9efacf736c23624a472246b (git) Affected: 529766e0a0114438887382a68d97341fbf8349fb , < 8bf719659406e4a1b56d441e0c7da2085d891d96 (git) Affected: 529766e0a0114438887382a68d97341fbf8349fb , < 82048795242f04275a3f49ffc66ad851b6120954 (git)
Linux	Linux	Affected: 5.2 Unaffected: 0 , < 5.2 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/i2c/busses/i2c-amd-mp2-plat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9142a3dcff0d80a3a24ce159aee19ddc869d9784",
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              "version": "529766e0a0114438887382a68d97341fbf8349fb",
              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "4786d4d70dcd1e6b7e044f2348e00f201947b69c",
              "status": "affected",
              "version": "529766e0a0114438887382a68d97341fbf8349fb",
              "versionType": "git"
            },
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              "version": "529766e0a0114438887382a68d97341fbf8349fb",
              "versionType": "git"
            },
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                },
                {
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: amd-mp2: Unregister callback on adapter add failure\n\namd_mp2_register_cb() stores the platform I2C context in the MP2 PCI\ndriver\u0027s callback table before the adapter is registered. If\ni2c_add_adapter() fails, probe returns and devres frees the context,\nbut the PCI driver can still dereference the stale pointer from its IRQ\nand system-sleep callbacks.\n\nUnregister the callback before returning the adapter registration error."
        }
      ],
      "metrics": [
        {
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            "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 flaw is in AMD MP2 platform-driver probe teardown and PCI IRQ/system-sleep callbacks, reachable only via local suspend/resume or MP2 hardware interrupts on affected Ryzen laptops; there is no network, Bluetooth, or userspace I2C ioctl path to the stale callback table.\nAC:L - Once i2c_add_adapter() fails the dangling busses[] pointer is deterministic; an attacker can force that registration failure with memory pressure or driver rebind on modular builds, then reliably trigger the UAF through system suspend or MP2 IRQ without uncontrollable races.\nPR:L - After the flawed probe error path leaves the stale callback registered, local users can invoke system suspend via logind/systemctl without init-namespace root, and MP2 IRQs can fire from the already-enabled bus; per CNA guidance Low is used when probe/bind privilege gating is ambiguous.\nUI:N - Exploitation requires no separate victim action; the attacker triggers suspend themselves or relies on automatic MP2 hardware interrupts from an enabled bus, without needing another user to mount filesystems or open files.\nS:U - Impact is host-kernel heap corruption and privilege escalation from stale callback dereference; it does not cross VM, IOMMU, or sandbox security boundaries.\nC:H - The IRQ handler writes into freed amd_i2c_common memory and invokes cmd_completion from the stale object; this UAF provides attacker-influenced heap reuse and arbitrary kernel read primitives per kernel CNA UAF guidance.\nI:H - Suspend/resume and IRQ paths call function pointers through the freed amd_i2c_common structure, enabling control-flow hijack and heap corruption consistent with exploitable UAF write primitives.\nA:H - Stale callback dereference in IRQ or system-sleep paths causes kernel oops/panic and loss of availability; UAF heap corruption can also hang or crash affected AMD MP2 systems on every suspend or interrupt."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:22:06.613Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/9142a3dcff0d80a3a24ce159aee19ddc869d9784"
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          "url": "https://git.kernel.org/stable/c/2f7789b3a9628819ebf90bcba8f9da3c139f8687"
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          "url": "https://git.kernel.org/stable/c/4786d4d70dcd1e6b7e044f2348e00f201947b69c"
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          "url": "https://git.kernel.org/stable/c/b7c2c5c8868737926410b93d1223ada17625ead3"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf107c5983dc70fcf932a305581a5f976d908ff1"
        },
        {
          "url": "https://git.kernel.org/stable/c/1883a09a37fed497b9efacf736c23624a472246b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8bf719659406e4a1b56d441e0c7da2085d891d96"
        },
        {
          "url": "https://git.kernel.org/stable/c/82048795242f04275a3f49ffc66ad851b6120954"
        }
      ],
      "title": "i2c: amd-mp2: Unregister callback on adapter add failure",
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        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80680",
    "datePublished": "2026-08-28T06:52:48.300Z",
    "dateReserved": "2026-08-26T14:34:25.783Z",
    "dateUpdated": "2026-08-29T06:22:06.613Z",
    "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.

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