CVE-2021-47633: ath5k: fix OOB in ath5k_eeprom_read_pcal_info_5111

Published Feb 26, 2025
·
Updated

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

ath5k: fix OOB in ath5keepromreadpcalinfo5111

The bug was found during fuzzing. Stacktrace locates it in ath5keepromconvertpcalinfo5111. When none of the curve is selected in the loop, idx can go up to AR5KEEPROMNPDCURVES. The line makes pd out of bound. pd = &chinfo[pier].pdcurves[idx];

There are many OOB writes using pd later in the code. So I added a sanity check for idx. Checks for other loops involving AR5KEEPROMNPDCURVES are not needed as the loop index is not used outside the loops.

The patch is NOT tested with real device.

The following is the fuzzing report

BUG: KASAN: slab-out-of-bounds in ath5keepromreadpcalinfo5111+0x126a/0x1390 [ath5k] Write of size 1 at addr ffff8880174a4d60 by task modprobe/214

CPU: 0 PID: 214 Comm: modprobe Not tainted 5.6.0 #1 Call Trace: dumpstack+0x76/0xa0 printaddressdescription.constprop.0+0x16/0x200 ? ath5keepromreadpcalinfo5111+0x126a/0x1390 [ath5k] ? ath5keepromreadpcalinfo5111+0x126a/0x1390 [ath5k] kasanreport.cold+0x37/0x7c ? ath5keepromreadpcalinfo5111+0x126a/0x1390 [ath5k] kasanreport+0xe/0x20 ath5keepromreadpcalinfo5111+0x126a/0x1390 [ath5k] ? apictimerinterrupt+0xa/0x20 ? ath5keeprominit11apcalfreq+0xbc0/0xbc0 [ath5k] ? ath5kpcieepromread+0x228/0x3c0 [ath5k] ath5keeprominit+0x2513/0x6290 [ath5k] ? ath5keeprominit11apcalfreq+0xbc0/0xbc0 [ath5k] ? usleeprange+0xb8/0x100 ? apictimerinterrupt+0xa/0x20 ? ath5keepromreadpcalinfo2413+0x2f20/0x2f20 [ath5k] ath5khwinit+0xb60/0x1970 [ath5k] ath5kinitah+0x6fe/0x2530 [ath5k] ? kasprintf+0xa6/0xe0 ? ath5kstop+0x140/0x140 [ath5k] ? devnotice+0xf6/0xf6 ? apictimerinterrupt+0xa/0x20 ath5kpciprobe.cold+0x29a/0x3d6 [ath5k] ? ath5kpcieepromread+0x3c0/0x3c0 [ath5k] ? mutexlock+0x89/0xd0 ? ath5kpcieepromread+0x3c0/0x3c0 [ath5k] localpciprobe+0xd3/0x160 pcideviceprobe+0x23f/0x3e0 ? pcideviceremove+0x280/0x280 ? pcideviceremove+0x280/0x280 reallyprobe+0x209/0x5d0

Affected Software

157 affected componentsFixes available
Linux Linux kernel
Linux Linux kernel>=2.6.30<4.9.311
Linux Linux kernel>=4.10<4.14.276
Linux Linux kernel>=4.15<4.19.238
Linux Linux kernel>=4.20<5.4.189
Linux Linux kernel>=5.5<5.10.111
Linux Linux kernel>=5.11<5.15.34
Linux Linux kernel>=5.16<5.16.20
Linux Linux kernel>=5.17<5.17.3
ubuntu/linux-azure<4.15.0-1146.161~14.04.1
4.15.0-1146.161~14.04.1
ubuntu/linux*
ubuntu/linux-aws<4.4.0-1162.168
4.4.0-1162.168
ubuntu/linux-lts-xenial<4.4.0-291.325~14.04.1
4.4.0-291.325~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1137.148~16.04.1
4.15.0-1137.148~16.04.1
ubuntu/linux-azure<4.15.0-1146.161~16.04.1
4.15.0-1146.161~16.04.1
ubuntu/linux-gcp<4.15.0-1131.147~16.04.1
4.15.0-1131.147~16.04.1
ubuntu/linux-hwe<4.15.0-189.200~16.04.1
4.15.0-189.200~16.04.1
ubuntu/linux-oracle<4.15.0-1102.113~16.04.1
4.15.0-1102.113~16.04.1
ubuntu/linux<4.4.0-291.325
4.4.0-291.325
ubuntu/linux-aws<4.4.0-1200.215
4.4.0-1200.215
ubuntu/linux-hwe-edge*
ubuntu/linux-kvm<4.4.0-1163.174
4.4.0-1163.174
ubuntu/linux-fips*
ubuntu/linux-fips*
ubuntu/linux<4.15.0-189.200
4.15.0-189.200
ubuntu/linux-aws<4.15.0-1137.148
4.15.0-1137.148
ubuntu/linux-aws-5.4<5.4.0-1078.84~18.04.1
5.4.0-1078.84~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1146.161
4.15.0-1146.161
ubuntu/linux-azure-5.4<5.4.0-1083.87~18.04.1
5.4.0-1083.87~18.04.1
ubuntu/linux-gcp-4.15<4.15.0-1131.147
4.15.0-1131.147
ubuntu/linux-gcp-5.4<5.4.0-1078.84~18.04.1
5.4.0-1078.84~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-117.132~18.04.1
5.4.0-117.132~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1028.32~18.04.1
5.4.0-1028.32~18.04.1
ubuntu/linux-kvm<4.15.0-1123.128
4.15.0-1123.128
ubuntu/linux-oracle<4.15.0-1102.113
4.15.0-1102.113
ubuntu/linux-oracle-5.4<5.4.0-1076.83~18.04.1
5.4.0-1076.83~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1065.75~18.04.1
5.4.0-1065.75~18.04.1
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<4.15.0-2076.81
4.15.0-2076.81
ubuntu/linux-azure-fips<4.15.0-2057.63
4.15.0-2057.63
ubuntu/linux-fips<4.15.0-1094.105
4.15.0-1094.105
ubuntu/linux-gcp-fips<4.15.0-2041.46
4.15.0-2041.46
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-117.132
5.4.0-117.132
ubuntu/linux-aws<5.4.0-1078.84
5.4.0-1078.84
ubuntu/linux-azure<5.4.0-1083.87
5.4.0-1083.87
ubuntu/linux-azure-5.15<5.15.0-1008.9~20.04.1
5.15.0-1008.9~20.04.1
ubuntu/linux-bluefield<5.4.0-1040.44
5.4.0-1040.44
ubuntu/linux-gcp<5.4.0-1078.84
5.4.0-1078.84
ubuntu/linux-hwe-5.15<5.15.0-41.44~20.04.1
5.15.0-41.44~20.04.1
ubuntu/linux-ibm<5.4.0-1026.29
5.4.0-1026.29
ubuntu/linux-intel-iotg-5.15<5.15.0-1008.11~20.04.1
5.15.0-1008.11~20.04.1
ubuntu/linux-iot<5.4.0-1004.6
5.4.0-1004.6
ubuntu/linux-kvm<5.4.0-1068.72
5.4.0-1068.72
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-42.45~20.04.1
5.15.0-42.45~20.04.1
ubuntu/linux-oracle<5.4.0-1076.83
5.4.0-1076.83
ubuntu/linux-raspi<5.4.0-1065.75
5.4.0-1065.75
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-gkeop*
ubuntu/linux-gkeop-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<5.4.0-1078.84+fips1
5.4.0-1078.84+fips1
ubuntu/linux-azure-fips<5.4.0-1083.87+fips1
5.4.0-1083.87+fips1
ubuntu/linux-fips<5.4.0-1054.61
5.4.0-1054.61
ubuntu/linux-gcp-fips<5.4.0-1078.84+fips1
5.4.0-1078.84+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-37.39
5.15.0-37.39
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1011.14
5.15.0-1011.14
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-azure<5.15.0-1010.12
5.15.0-1010.12
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1008.12
5.15.0-1008.12
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gke<5.15.0-1008.10
5.15.0-1008.10
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-ibm<5.15.0-1007.8
5.15.0-1007.8
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1008.11
5.15.0-1008.11
ubuntu/linux-kvm<5.15.0-1010.11
5.15.0-1010.11
ubuntu/linux-lowlatency<5.15.0-37.39
5.15.0-37.39
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1009.12
5.15.0-1009.12
ubuntu/linux-oracle-6.5*
ubuntu/linux-raspi<5.15.0-1011.13
5.15.0-1011.13
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-realtime<5.15.0-1014.14
5.15.0-1014.14
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 4.15.0-1146.161~14.04.1
  2. Upgrade

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

    Fixed in 4.4.0-1162.168
  3. Upgrade

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

    Fixed in 4.4.0-291.325~14.04.1
  4. Upgrade

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

    Fixed in 4.15.0-1137.148~16.04.1
  5. Upgrade

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

    Fixed in 4.15.0-1146.161~16.04.1
  6. Upgrade

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

    Fixed in 4.15.0-1131.147~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-189.200~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1102.113~16.04.1
  9. Upgrade

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

    Fixed in 4.4.0-291.325
  10. Upgrade

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

    Fixed in 4.4.0-1200.215
  11. Upgrade

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

    Fixed in 4.4.0-1163.174
  12. Upgrade

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

    Fixed in 4.15.0-189.200
  13. Upgrade

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

    Fixed in 4.15.0-1137.148
  14. Upgrade

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

    Fixed in 5.4.0-1078.84~18.04.1
  15. Upgrade

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

    Fixed in 4.15.0-1146.161
  16. Upgrade

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

    Fixed in 5.4.0-1083.87~18.04.1
  17. Upgrade

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

    Fixed in 4.15.0-1131.147
  18. Upgrade

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

    Fixed in 5.4.0-1078.84~18.04.1
  19. Upgrade

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

    Fixed in 5.4.0-117.132~18.04.1
  20. Upgrade

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

    Fixed in 5.4.0-1028.32~18.04.1
  21. Upgrade

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

    Fixed in 4.15.0-1123.128
  22. Upgrade

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

    Fixed in 4.15.0-1102.113
  23. Upgrade

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

    Fixed in 5.4.0-1076.83~18.04.1
  24. Upgrade

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

    Fixed in 5.4.0-1065.75~18.04.1
  25. Upgrade

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

    Fixed in 4.15.0-2076.81
  26. Upgrade

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

    Fixed in 4.15.0-2057.63
  27. Upgrade

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

    Fixed in 4.15.0-1094.105
  28. Upgrade

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

    Fixed in 4.15.0-2041.46
  29. Upgrade

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

    Fixed in 5.4.0-117.132
  30. Upgrade

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

    Fixed in 5.4.0-1078.84
  31. Upgrade

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

    Fixed in 5.4.0-1083.87
  32. Upgrade

    Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1008.9~20.04.1
  33. Upgrade

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

    Fixed in 5.4.0-1040.44
  34. Upgrade

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

    Fixed in 5.4.0-1078.84
  35. Upgrade

    Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-41.44~20.04.1
  36. Upgrade

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

    Fixed in 5.4.0-1026.29
  37. Upgrade

    Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1008.11~20.04.1
  38. Upgrade

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

    Fixed in 5.4.0-1004.6
  39. Upgrade

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

    Fixed in 5.4.0-1068.72
  40. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-42.45~20.04.1
  41. Upgrade

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

    Fixed in 5.4.0-1076.83
  42. Upgrade

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

    Fixed in 5.4.0-1065.75
  43. Upgrade

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

    Fixed in 5.4.0-1078.84+fips1
  44. Upgrade

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

    Fixed in 5.4.0-1083.87+fips1
  45. Upgrade

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

    Fixed in 5.4.0-1054.61
  46. Upgrade

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

    Fixed in 5.4.0-1078.84+fips1
  47. Upgrade

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

    Fixed in 5.15.0-37.39
  48. Upgrade

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

    Fixed in 5.15.0-1011.14
  49. Upgrade

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

    Fixed in 5.15.0-1010.12
  50. Upgrade

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

    Fixed in 5.15.0-1008.12
  51. Upgrade

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

    Fixed in 5.15.0-1008.10
  52. Upgrade

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

    Fixed in 5.15.0-1007.8
  53. Upgrade

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

    Fixed in 5.15.0-1008.11
  54. Upgrade

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

    Fixed in 5.15.0-1010.11
  55. Upgrade

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

    Fixed in 5.15.0-37.39
  56. Upgrade

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

    Fixed in 5.15.0-1009.12
  57. Upgrade

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

    Fixed in 5.15.0-1011.13
  58. Upgrade

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

    Fixed in 5.15.0-1014.14
  59. Compensating control

    In ath5k_eeprom_read_pcal_info_5111, add a sanity check for idx before evaluating pd = &chinfo[pier].pd_curves[idx], preventing idx from reaching AR5K_EEPROM_N_PD_CURVES when no curve is selected.

Event History

Feb 26, 2025
CVE Published
via MITRE·01:54 AM
Data Sourced
via MITRE·01:54 AM
Description
Data Sourced
via OSV·06:37 AM
DescriptionSeverityAffected Software
Event
via OSV·06:37 AM
Data Sourced
via NVD·06:37 AM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2021-47633?

CVE-2021-47633 is categorized as having a moderate severity level due to the potential for out-of-bounds access in the Linux kernel.

2

How do I fix CVE-2021-47633?

To address CVE-2021-47633, update your Linux kernel to the latest version where the vulnerability has been remedied.

3

What is affected by CVE-2021-47633?

CVE-2021-47633 affects the Linux Kernel, particularly the ath5k driver component.

4

What causes CVE-2021-47633?

CVE-2021-47633 is caused by an out-of-bounds access vulnerability during the processing of EEPROM data in the ath5k driver.

5

Is CVE-2021-47633 exploitable in production environments?

Yes, CVE-2021-47633 can potentially be exploited in production environments if an attacker can leverage the affected driver.

Company

Resources

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