CVE-2021-46998 (GCVE-0-2021-46998)
Vulnerability from cvelistv5
Published
2024-02-28 08:13
Modified
2025-05-04 07:02
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside enic_queue_wq_skb, if some error happens, the skb will be freed by dev_kfree_skb(skb). But the freed skb is still used in skb_tx_timestamp(skb). My patch makes enic_queue_wq_skb() return error and goto spin_unlock() incase of error. The solution is provided by Govind. See https://lkml.org/lkml/2021/4/30/961.
References
Impacted products
Vendor Product Version
Linux Linux Version: fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3
Version: fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3
Version: fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3
Version: fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3
Version: fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3
Version: fb7516d42478ebc8e2f00efb76ef96f7b68fd8d3
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Inside\\nenic_queue_wq_skb, if some error happens, the skb will be freed\\nby dev_kfree_skb(skb). But the freed skb is still used in\\nskb_tx_timestamp(skb).\\n\\nMy patch makes enic_queue_wq_skb() return error and goto spin_unlock()\\nincase of error. The solution is provided by Govind.\\nSee https://lkml.org/lkml/2021/4/30/961.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.191\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.120\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.38\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.11.22\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.5\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"4.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:02:00.757Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-46998\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:02:00.757Z\", \"dateReserved\": \"2024-02-27T18:42:55.950Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-28T08:13:21.651Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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