CVE-2021-47001 (GCVE-0-2021-47001)

Vulnerability from cvelistv5 – Published: 2024-02-28 08:13 – Updated: 2025-05-04 12:40
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: xprtrdma: Fix cwnd update ordering After a reconnect, the reply handler is opening the cwnd (and thus enabling more RPC Calls to be sent) /before/ rpcrdma_post_recvs() can post enough Receive WRs to receive their replies. This causes an RNR and the new connection is lost immediately. The race is most clearly exposed when KASAN and disconnect injection are enabled. This slows down rpcrdma_rep_create() enough to allow the send side to post a bunch of RPC Calls before the Receive completion handler can invoke ib_post_recv().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2ae50ad68cd79224198b525f7bd645c9da98b6ff , < eddae8be7944096419c2ae29477a45f767d0fcd4 (git)
Affected: 2ae50ad68cd79224198b525f7bd645c9da98b6ff , < 8834ecb5df22b7ff3c9b0deba7726579bb613f95 (git)
Affected: 2ae50ad68cd79224198b525f7bd645c9da98b6ff , < 19b5fa9489b5706bc878c3a522a7f771079e2fa0 (git)
Affected: 2ae50ad68cd79224198b525f7bd645c9da98b6ff , < 35d8b10a25884050bb3b0149b62c3818ec59f77c (git)
Affected: 3791c5982ba1eebf2900ee7ca7b9a89619c26d54 (git)
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    Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.38 , ≤ 5.10.* (semver)
Unaffected: 5.11.22 , ≤ 5.11.* (semver)
Unaffected: 5.12.5 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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      "dataType": "CVE_RECORD",
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  }
}


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Sightings

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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.