github - ghsa-m7wr-q7cm-56rh

ghsa-m7wr-q7cm-56rh

Vulnerability from github

Published

2024-04-10 21:30

Modified

2024-04-10 21:30

Details

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

scsi: lpfc: Fix link down processing to address NULL pointer dereference

If an FC link down transition while PLOGIs are outstanding to fabric well known addresses, outstanding ABTS requests may result in a NULL pointer dereference. Driver unload requests may hang with repeated "2878" log messages.

The Link down processing results in ABTS requests for outstanding ELS requests. The Abort WQEs are sent for the ELSs before the driver had set the link state to down. Thus the driver is sending the Abort with the expectation that an ABTS will be sent on the wire. The Abort request is stalled waiting for the link to come up. In some conditions the driver may auto-complete the ELSs thus if the link does come up, the Abort completions may reference an invalid structure.

Fix by ensuring that Abort set the flag to avoid link traffic if issued due to conditions where the link failed.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47183"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-10T19:15:47Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: lpfc: Fix link down processing to address NULL pointer dereference\n\nIf an FC link down transition while PLOGIs are outstanding to fabric well\nknown addresses, outstanding ABTS requests may result in a NULL pointer\ndereference. Driver unload requests may hang with repeated \"2878\" log\nmessages.\n\nThe Link down processing results in ABTS requests for outstanding ELS\nrequests. The Abort WQEs are sent for the ELSs before the driver had set\nthe link state to down. Thus the driver is sending the Abort with the\nexpectation that an ABTS will be sent on the wire. The Abort request is\nstalled waiting for the link to come up. In some conditions the driver may\nauto-complete the ELSs thus if the link does come up, the Abort completions\nmay reference an invalid structure.\n\nFix by ensuring that Abort set the flag to avoid link traffic if issued due\nto conditions where the link failed.",
  "id": "GHSA-m7wr-q7cm-56rh",
  "modified": "2024-04-10T21:30:30Z",
  "published": "2024-04-10T21:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47183"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28de48a7cea495ab48082d9ff4ef63f7cb4e563a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2021-47183

Vulnerability from cvelistv5

Published

2024-04-10 18:56

Modified

2024-11-04 12:01

Severity ?

Summary

scsi: lpfc: Fix link down processing to address NULL pointer dereference

References

▼	URL	Tags
	https://git.kernel.org/stable/c/28de48a7cea495ab48082d9ff4ef63f7cb4e563a
	https://git.kernel.org/stable/c/1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6

Impacted products

Vendor

Product

Version

▼

Linux

Version: 1da177e4c3f4
Version: 1da177e4c3f4

Linux

Show details on NVD website

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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