CVE-2021-47587: net: systemport: Add global locking for descriptor lifecycle

Published Jun 19, 2024
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

net: systemport: Add global locking for descriptor lifecycle

The descriptor list is a shared resource across all of the transmit queues, and the locking mechanism used today only protects concurrency across a given transmit queue between the transmit and reclaiming. This creates an opportunity for the SYSTEMPORT hardware to work on corrupted descriptors if we have multiple producers at once which is the case when using multiple transmit queues.

This was particularly noticeable when using multiple flows/transmit queues and it showed up in interesting ways in that UDP packets would get a correct UDP header checksum being calculated over an incorrect packet length. Similarly TCP packets would get an equally correct checksum computed by the hardware over an incorrect packet length.

The SYSTEMPORT hardware maintains an internal descriptor list that it re-arranges when the driver produces a new descriptor anytime it writes to the WRITEPORT{HI,LO} registers, there is however some delay in the hardware to re-organize its descriptors and it is possible that concurrent TX queues eventually break this internal allocation scheme to the point where the length/status part of the descriptor gets used for an incorrect data buffer.

The fix is to impose a global serialization for all TX queues in the short section where we are writing to the WRITEPORT{HI,LO} registers which solves the corruption even with multiple concurrent TX queues being used.

Affected Software

131 affected componentsFixes available
Linux Linux kernel>=3.16<4.4.296
Linux Linux kernel>=4.5<4.9.294
Linux Linux kernel>=4.10<4.14.259
Linux Linux kernel>=4.15<4.19.222
Linux Linux kernel>=4.20<5.4.168
Linux Linux kernel>=5.5<5.10.88
Linux Linux kernel>=5.11<5.15.11
Linux Linux kernel=5.16-rc1
Linux Linux kernel=5.16-rc2
Linux Linux kernel=5.16-rc3
Linux Linux kernel=5.16-rc4
Linux Linux kernel=5.16-rc5
ubuntu/linux-azure<4.15.0-1131.144~14.04.1
4.15.0-1131.144~14.04.1
ubuntu/linux-aws<4.4.0-1143.149
4.4.0-1143.149
ubuntu/linux-lts-xenial<4.4.0-268.302~14.04.1
4.4.0-268.302~14.04.1
ubuntu/linux<4.4.0-268.302
4.4.0-268.302
ubuntu/linux-aws<4.4.0-1181.196
4.4.0-1181.196
ubuntu/linux-aws-hwe<4.15.0-1120.128~16.04.1
4.15.0-1120.128~16.04.1
ubuntu/linux-azure<4.15.0-1131.144~16.04.1
4.15.0-1131.144~16.04.1
ubuntu/linux-gcp<4.15.0-1116.130~16.04.1
4.15.0-1116.130~16.04.1
ubuntu/linux-hwe<4.15.0-169.177~16.04.1
4.15.0-169.177~16.04.1
ubuntu/linux-kvm<4.4.0-1144.155
4.4.0-1144.155
ubuntu/linux-oracle<4.15.0-1087.95~16.04.1
4.15.0-1087.95~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-fips<4.4.0-1113.120
4.4.0-1113.120
ubuntu/linux-fips*
ubuntu/linux<4.15.0-169.177
4.15.0-169.177
ubuntu/linux-aws<4.15.0-1121.129
4.15.0-1121.129
ubuntu/linux-aws-5.4<5.4.0-1069.73~18.04.1
5.4.0-1069.73~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1131.144
4.15.0-1131.144
ubuntu/linux-azure-5.4<5.4.0-1073.76~18.04.1
5.4.0-1073.76~18.04.1
ubuntu/linux-gcp-4.15<4.15.0-1116.130
4.15.0-1116.130
ubuntu/linux-gcp-5.4<5.4.0-1068.72~18.04.1
5.4.0-1068.72~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-105.119~18.04.1
5.4.0-105.119~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1018.20~18.04.1
5.4.0-1018.20~18.04.1
ubuntu/linux-kvm<4.15.0-1107.109
4.15.0-1107.109
ubuntu/linux-oracle<4.15.0-1087.95
4.15.0-1087.95
ubuntu/linux-oracle-5.4<5.4.0-1067.72~18.04.1
5.4.0-1067.72~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1056.63~18.04.1
5.4.0-1056.63~18.04.1
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2061.63
4.15.0-2061.63
ubuntu/linux-azure-fips<4.15.0-2043.47
4.15.0-2043.47
ubuntu/linux-fips<4.15.0-1078.87
4.15.0-1078.87
ubuntu/linux-gcp-fips<4.15.0-2026.28
4.15.0-2026.28
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-105.119
5.4.0-105.119
ubuntu/linux-aws<5.4.0-1069.73
5.4.0-1069.73
ubuntu/linux-azure<5.4.0-1073.76
5.4.0-1073.76
ubuntu/linux-bluefield<5.4.0-1032.35
5.4.0-1032.35
ubuntu/linux-gcp<5.4.0-1068.72
5.4.0-1068.72
ubuntu/linux-gkeop<5.4.0-1037.38
5.4.0-1037.38
ubuntu/linux-ibm<5.4.0-1018.20
5.4.0-1018.20
ubuntu/linux-kvm<5.4.0-1059.62
5.4.0-1059.62
ubuntu/linux-oracle<5.4.0-1067.72
5.4.0-1067.72
ubuntu/linux-raspi<5.4.0-1056.63
5.4.0-1056.63
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.8*
ubuntu/linux-gke*
ubuntu/linux-gke-5.15*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.13*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-aws-fips<5.4.0-1069.73+fips2
5.4.0-1069.73+fips2
ubuntu/linux-azure-fips<5.4.0-1073.76+fips1
5.4.0-1073.76+fips1
ubuntu/linux-fips<5.4.0-1046.52
5.4.0-1046.52
ubuntu/linux-gcp-fips<5.4.0-1067.71~20.04.1
5.4.0-1067.71~20.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-nvidia-6.2*
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1131.144~14.04.1
  2. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1143.149
  3. Upgrade

    Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.

    Fixed in 4.4.0-268.302~14.04.1
  4. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 4.4.0-268.302
  5. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1181.196
  6. Upgrade

    Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-1120.128~16.04.1
  7. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1131.144~16.04.1
  8. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.15.0-1116.130~16.04.1
  9. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-169.177~16.04.1
  10. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.4.0-1144.155
  11. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1087.95~16.04.1
  12. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 4.4.0-1113.120
  13. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 4.15.0-169.177
  14. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.15.0-1121.129
  15. Upgrade

    Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1069.73~18.04.1
  16. Upgrade

    Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1131.144
  17. Upgrade

    Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1073.76~18.04.1
  18. Upgrade

    Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1116.130
  19. Upgrade

    Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1068.72~18.04.1
  20. Upgrade

    Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-105.119~18.04.1
  21. Upgrade

    Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1018.20~18.04.1
  22. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.15.0-1107.109
  23. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1087.95
  24. Upgrade

    Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1067.72~18.04.1
  25. Upgrade

    Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1056.63~18.04.1
  26. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2061.63
  27. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2043.47
  28. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-1078.87
  29. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2026.28
  30. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.4.0-105.119
  31. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1069.73
  32. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1073.76
  33. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 5.4.0-1032.35
  34. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1068.72
  35. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 5.4.0-1037.38
  36. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1018.20
  37. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1059.62
  38. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1067.72
  39. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1056.63
  40. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1069.73+fips2
  41. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1073.76+fips1
  42. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1046.52
  43. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1067.71~20.04.1
  44. Compensating control

    Impose global serialization across all transmit (TX) queues for the short section where the driver writes to the SYSTEMPORT WRITE_PORT_{HI,LO} registers, protecting the shared descriptor list and descriptor lifecycle.

Event History

Jun 19, 2024
CVE Published
via MITRE·02:53 PM
Data Sourced
via MITRE·02:53 PM
DescriptionSeverity
Data Sourced
via OSV·03:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·03:15 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2021-47587?

CVE-2021-47587 is classified as a medium severity vulnerability in the Linux kernel.

2

How do I fix CVE-2021-47587?

To remediate CVE-2021-47587, users should update their Linux kernel to the latest patched version.

3

What systems are affected by CVE-2021-47587?

CVE-2021-47587 affects multiple versions of the Linux kernel, specifically versions between 3.16 and 5.16-rc5.

4

What type of vulnerability is CVE-2021-47587?

CVE-2021-47587 is a concurrency issue related to the locking mechanism of the descriptor list in the Linux kernel.

5

Are there any workarounds for CVE-2021-47587?

Currently, there are no specific workarounds for CVE-2021-47587; patching is the recommended approach.

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