CVE-2021-47015 (GCVE-0-2021-47015)

Vulnerability from cvelistv5 – Published: 2024-02-28 08:13 – Updated: 2025-05-04 12:40
VLAI?
Title
bnxt_en: Fix RX consumer index logic in the error path.
Summary
In the Linux kernel, the following vulnerability has been resolved: bnxt_en: Fix RX consumer index logic in the error path. In bnxt_rx_pkt(), the RX buffers are expected to complete in order. If the RX consumer index indicates an out of order buffer completion, it means we are hitting a hardware bug and the driver will abort all remaining RX packets and reset the RX ring. The RX consumer index that we pass to bnxt_discard_rx() is not correct. We should be passing the current index (tmp_raw_cons) instead of the old index (raw_cons). This bug can cause us to be at the wrong index when trying to abort the next RX packet. It can crash like this: #0 [ffff9bbcdf5c39a8] machine_kexec at ffffffff9b05e007 #1 [ffff9bbcdf5c3a00] __crash_kexec at ffffffff9b111232 #2 [ffff9bbcdf5c3ad0] panic at ffffffff9b07d61e #3 [ffff9bbcdf5c3b50] oops_end at ffffffff9b030978 #4 [ffff9bbcdf5c3b78] no_context at ffffffff9b06aaf0 #5 [ffff9bbcdf5c3bd8] __bad_area_nosemaphore at ffffffff9b06ae2e #6 [ffff9bbcdf5c3c28] bad_area_nosemaphore at ffffffff9b06af24 #7 [ffff9bbcdf5c3c38] __do_page_fault at ffffffff9b06b67e #8 [ffff9bbcdf5c3cb0] do_page_fault at ffffffff9b06bb12 #9 [ffff9bbcdf5c3ce0] page_fault at ffffffff9bc015c5 [exception RIP: bnxt_rx_pkt+237] RIP: ffffffffc0259cdd RSP: ffff9bbcdf5c3d98 RFLAGS: 00010213 RAX: 000000005dd8097f RBX: ffff9ba4cb11b7e0 RCX: ffffa923cf6e9000 RDX: 0000000000000fff RSI: 0000000000000627 RDI: 0000000000001000 RBP: ffff9bbcdf5c3e60 R8: 0000000000420003 R9: 000000000000020d R10: ffffa923cf6ec138 R11: ffff9bbcdf5c3e83 R12: ffff9ba4d6f928c0 R13: ffff9ba4cac28080 R14: ffff9ba4cb11b7f0 R15: ffff9ba4d5a30000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a1b0e4e684e9c300b9e759b46cb7a0147e61ddff , < b1523e4ba293b2a32d9fabaf70c1dcaa6e3e2847 (git)
Affected: a1b0e4e684e9c300b9e759b46cb7a0147e61ddff , < 4fcaad2b7dac3f16704f8118c7e481024ddbd3ed (git)
Affected: a1b0e4e684e9c300b9e759b46cb7a0147e61ddff , < e187ef83c04a5d23e68d39cfdff1a1931e29890c (git)
Affected: a1b0e4e684e9c300b9e759b46cb7a0147e61ddff , < 3fbc5bc651d688fbea2a59cdc91520a2f5334d0a (git)
Affected: a1b0e4e684e9c300b9e759b46cb7a0147e61ddff , < bbd6f0a948139970f4a615dff189d9a503681a39 (git)
Affected: 8e302e8e10b05165ed21273539a1e6a83ab93e9e (git)
Affected: 46281ee85b651b0df686001651b965d17b8e2c67 (git)
Affected: d2d055a554036b0240f296743942b8111fd4ce97 (git)
Affected: aecbbae850ede49183fa0b73c7445531a47669cf (git)
Create a notification for this product.
    Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.4.119 , ≤ 5.4.* (semver)
Unaffected: 5.10.37 , ≤ 5.10.* (semver)
Unaffected: 5.11.21 , ≤ 5.11.* (semver)
Unaffected: 5.12.4 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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The RX consumer index\\nthat we pass to bnxt_discard_rx() is not correct.  We should be\\npassing the current index (tmp_raw_cons) instead of the old index\\n(raw_cons).  This bug can cause us to be at the wrong index when\\ntrying to abort the next RX packet.  It can crash like this:\\n\\n #0 [ffff9bbcdf5c39a8] machine_kexec at ffffffff9b05e007\\n #1 [ffff9bbcdf5c3a00] __crash_kexec at ffffffff9b111232\\n #2 [ffff9bbcdf5c3ad0] panic at ffffffff9b07d61e\\n #3 [ffff9bbcdf5c3b50] oops_end at ffffffff9b030978\\n #4 [ffff9bbcdf5c3b78] no_context at ffffffff9b06aaf0\\n #5 [ffff9bbcdf5c3bd8] __bad_area_nosemaphore at ffffffff9b06ae2e\\n #6 [ffff9bbcdf5c3c28] bad_area_nosemaphore at ffffffff9b06af24\\n #7 [ffff9bbcdf5c3c38] __do_page_fault at ffffffff9b06b67e\\n #8 [ffff9bbcdf5c3cb0] do_page_fault at ffffffff9b06bb12\\n #9 [ffff9bbcdf5c3ce0] page_fault at ffffffff9bc015c5\\n    [exception RIP: bnxt_rx_pkt+237]\\n    RIP: ffffffffc0259cdd  RSP: ffff9bbcdf5c3d98  RFLAGS: 00010213\\n    RAX: 000000005dd8097f  RBX: ffff9ba4cb11b7e0  RCX: ffffa923cf6e9000\\n    RDX: 0000000000000fff  RSI: 0000000000000627  RDI: 0000000000001000\\n    RBP: ffff9bbcdf5c3e60   R8: 0000000000420003   R9: 000000000000020d\\n    R10: ffffa923cf6ec138  R11: ffff9bbcdf5c3e83  R12: ffff9ba4d6f928c0\\n    R13: ffff9ba4cac28080  R14: ffff9ba4cb11b7f0  R15: ffff9ba4d5a30000\\n    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.119\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.37\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.11.21\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.4\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.9.169\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.14.112\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.0.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T12:40:55.503Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47015\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T12:40:55.503Z\", \"dateReserved\": \"2024-02-27T18:42:55.953Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-28T08:13:32.135Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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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.
  • 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.