github - ghsa-m7wr-q7cm-56rh

GHSA-M7WR-Q7CM-56RH

Vulnerability from github – Published: 2024-04-10 21:30 – Updated: 2025-11-03 18:31

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.

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47183"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-10T19:15:47Z",
    "severity": "MODERATE"
  },
  "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": "2025-11-03T18:31:14Z",
  "published": "2024-04-10T21:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47183"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04c1af683270e4709a594bb1691b8800b945035a"
    },
    {
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      "url": "https://git.kernel.org/stable/c/1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6"
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    },
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  "severity": [
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}

CVE-2021-47183 (GCVE-0-2021-47183)

Vulnerability from cvelistv5 – Published: 2024-04-10 18:56 – Updated: 2025-11-03 17:30

Summary

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/04c1af683270e4709…
	https://git.kernel.org/stable/c/28de48a7cea495ab4…
	https://git.kernel.org/stable/c/1854f53ccd88ad4e7…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 04c1af683270e4709a594bb1691b8800b945035a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 28de48a7cea495ab48082d9ff4ef63f7cb4e563a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6 (git)

Linux

Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.5 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-M7WR-Q7CM-56RH

CVE-2021-47183 (GCVE-0-2021-47183)

Tags

Sightings

Nomenclature