Vulnerability-Lookup

GHSA-4546-WRV4-93XW

Vulnerability from github – Published: 2026-10-23 15:31 – Updated: 2026-10-23 15:31

Details

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

rust: irq: pass RegistrationInner as cookie to request_irq

With commit ba268514ea14 ("rust: devres: fix race condition due to nesting"), Devres::new() returns Result by value instead of initializing in-place via PinInit. Because request_irq() is called inside Devres::new(), registration.inner is still uninitialized when the IRQ is enabled, so accessing registration.inner.device() in the IRQ callback can read uninitialized memory.

Fix this by storing the Device and handler pointer in RegistrationInner and passing RegistrationInner as the IRQ cookie after its fields are initialized.

This is not needed in mainline because commit 98c63ce4d760 ("rust: irq: make Registration compatible with lifetime-bound drivers") removed Devres from irq::Registration and moved request_irq() after all fields are initialized.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98938"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T13:17:14Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrust: irq: pass RegistrationInner as cookie to request_irq\n\nWith commit ba268514ea14 (\"rust: devres: fix race condition due to\nnesting\"), Devres::new() returns Result\u003cSelf\u003e by value instead of\ninitializing in-place via PinInit. Because request_irq() is called\ninside Devres::new(), registration.inner is still uninitialized when the\nIRQ is enabled, so accessing registration.inner.device() in the IRQ\ncallback can read uninitialized memory.\n\nFix this by storing the Device and handler pointer in RegistrationInner\nand passing RegistrationInner as the IRQ cookie after its fields are\ninitialized.\n\nThis is not needed in mainline because commit 98c63ce4d760 (\"rust: irq:\nmake Registration compatible with lifetime-bound drivers\") removed\nDevres from irq::Registration and moved request_irq() after all fields\nare initialized.",
  "id": "GHSA-4546-wrv4-93xw",
  "modified": "2026-10-23T15:31:31Z",
  "published": "2026-10-23T15:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98938"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a7931e847f338a687e96cde9f37e0cff83ddd84"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98938 (GCVE-0-2026-98938)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:11 – Updated: 2026-10-23 12:11

Title

rust: irq: pass RegistrationInner as cookie to request_irq

Summary

In the Linux kernel, the following vulnerability has been resolved: rust: irq: pass RegistrationInner as cookie to request_irq With commit ba268514ea14 ("rust: devres: fix race condition due to nesting"), Devres::new() returns Result<Self> by value instead of initializing in-place via PinInit. Because request_irq() is called inside Devres::new(), registration.inner is still uninitialized when the IRQ is enabled, so accessing registration.inner.device() in the IRQ callback can read uninitialized memory. Fix this by storing the Device and handler pointer in RegistrationInner and passing RegistrationInner as the IRQ cookie after its fields are initialized. This is not needed in mainline because commit 98c63ce4d760 ("rust: irq: make Registration compatible with lifetime-bound drivers") removed Devres from irq::Registration and moved request_irq() after all fields are initialized.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7067 records in the last 180 days details

References

1 reference

URL	Tags
https://git.kernel.org/stable/c/9a7931e847f338a68…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 29e16fcd67ee5b1d0417a657294cf96fdf2f8df9 , < 9a7931e847f338a687e96cde9f37e0cff83ddd84 (git)
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (semver) Unaffected: 7.2.10 , ≤ 7.2.* (semver)

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  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "rust/kernel/irq/request.rs"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9a7931e847f338a687e96cde9f37e0cff83ddd84",
              "status": "affected",
              "version": "29e16fcd67ee5b1d0417a657294cf96fdf2f8df9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "rust/kernel/irq/request.rs"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.10",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrust: irq: pass RegistrationInner as cookie to request_irq\n\nWith commit ba268514ea14 (\"rust: devres: fix race condition due to\nnesting\"), Devres::new() returns Result\u003cSelf\u003e by value instead of\ninitializing in-place via PinInit. Because request_irq() is called\ninside Devres::new(), registration.inner is still uninitialized when the\nIRQ is enabled, so accessing registration.inner.device() in the IRQ\ncallback can read uninitialized memory.\n\nFix this by storing the Device and handler pointer in RegistrationInner\nand passing RegistrationInner as the IRQ cookie after its fields are\ninitialized.\n\nThis is not needed in mainline because commit 98c63ce4d760 (\"rust: irq:\nmake Registration compatible with lifetime-bound drivers\") removed\nDevres from irq::Registration and moved request_irq() after all fields\nare initialized."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T12:11:59.043Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9a7931e847f338a687e96cde9f37e0cff83ddd84"
        }
      ],
      "title": "rust: irq: pass RegistrationInner as cookie to request_irq",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98938",
    "datePublished": "2026-10-23T12:11:59.043Z",
    "dateReserved": "2026-09-25T10:25:14.381Z",
    "dateUpdated": "2026-10-23T12:11:59.043Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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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.

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