CVE-2023-53273 (GCVE-0-2023-53273)
Vulnerability from cvelistv5
Published
2025-09-16 08:11
Modified
2025-09-16 08:11
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Drivers: vmbus: Check for channel allocation before looking up relids relid2channel() assumes vmbus channel array to be allocated when called. However, in cases such as kdump/kexec, not all relids will be reset by the host. When the second kernel boots and if the guest receives a vmbus interrupt during vmbus driver initialization before vmbus_connect() is called, before it finishes, or if it fails, the vmbus interrupt service routine is called which in turn calls relid2channel() and can cause a null pointer dereference. Print a warning and error out in relid2channel() for a channel id that's invalid in the second kernel.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/176c6b4889195fbe7016d9401175b48c5c9edf68
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1eb65c8687316c65140b48fad27133d583178e15
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a5c44f3446a0565139b7d8abc78f58b86c398123
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c373e49fbb87aa177819866ed9194ebc5414dfd6
Impacted products
Vendor Product Version
Linux Linux Version: 8b6a877c060ed6b86878fe66c7c6493a6054cf23
Version: 8b6a877c060ed6b86878fe66c7c6493a6054cf23
Version: 8b6a877c060ed6b86878fe66c7c6493a6054cf23
Version: 8b6a877c060ed6b86878fe66c7c6493a6054cf23
Version: 8b6a877c060ed6b86878fe66c7c6493a6054cf23
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   Linux Linux Version: 5.8
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{
  "containers": {
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: vmbus: Check for channel allocation before looking up relids\n\nrelid2channel() assumes vmbus channel array to be allocated when called.\nHowever, in cases such as kdump/kexec, not all relids will be reset by the host.\nWhen the second kernel boots and if the guest receives a vmbus interrupt during\nvmbus driver initialization before vmbus_connect() is called, before it finishes,\nor if it fails, the vmbus interrupt service routine is called which in turn calls\nrelid2channel() and can cause a null pointer dereference.\n\nPrint a warning and error out in relid2channel() for a channel id that\u0027s invalid\nin the second kernel."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-16T08:11:08.792Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
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      "title": "Drivers: vmbus: Check for channel allocation before looking up relids",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53273",
    "datePublished": "2025-09-16T08:11:08.792Z",
    "dateReserved": "2025-09-16T08:09:37.989Z",
    "dateUpdated": "2025-09-16T08:11:08.792Z",
    "state": "PUBLISHED"
  },
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  }
}


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