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

Vulnerability from cvelistv5 – Published: 2024-04-10 18:56 – Updated: 2025-12-18 11:35
VLAI?
Title
scsi: lpfc: Fix link down processing to address NULL pointer dereference
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
References
Impacted products
Vendor Product Version
Linux Linux Affected: 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf , < 04c1af683270e4709a594bb1691b8800b945035a (git)
Affected: 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf , < 28de48a7cea495ab48082d9ff4ef63f7cb4e563a (git)
Affected: 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf , < 1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6 (git)
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    Linux Linux Affected: 2.6.38
Unaffected: 0 , < 2.6.38 (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.5 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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