CVE-2022-49934: wifi: mac80211: Fix UAF in ieee80211_scan_rx()

Published Jun 18, 2025
·
Updated

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

wifi: mac80211: Fix UAF in ieee80211scanrx()

ieee80211scanrx() tries to access scanreq->flags after a null check, but a UAF is observed when the scan is completed and ieee80211scancompleted() executes, which then calls cfg80211scandone() leading to the freeing of scanreq.

Since scanreq is rcudereference()'d, prevent the racing in ieee80211scancompleted() by ensuring that from mac80211's POV it is no longer accessed from an RCU read critical section before we call cfg80211scandone().

Affected Software

171 affected componentsFixes available
Linux Linux kernel
Linux Linux kernel>=3.19<4.9.330
Linux Linux kernel>=4.10<4.14.295
Linux Linux kernel>=4.15<4.19.260
Linux Linux kernel>=4.20<5.4.215
Linux Linux kernel>=5.5<5.10.142
Linux Linux kernel>=5.11<5.15.66
Linux Linux kernel>=5.16<5.19.8
Linux Linux kernel=6.0-rc1
Linux Linux kernel=6.0-rc2
Linux Linux kernel=6.0-rc3
debian/linux<5.19.11-1
5.19.11-1
debian/linux<5.19.11-1
5.19.11-1
debian/linux<5.19.11-1
5.19.11-1
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1
ubuntu/linux-azure<4.15.0-1162.177~14.04.1
4.15.0-1162.177~14.04.1
ubuntu/linux-aws*
ubuntu/linux-lts-xenial*
ubuntu/linux-aws-hwe<4.15.0-1151.164~16.04.1
4.15.0-1151.164~16.04.1
ubuntu/linux-azure<4.15.0-1162.177~16.04.1
4.15.0-1162.177~16.04.1
ubuntu/linux-gcp<4.15.0-1146.162~16.04.1
4.15.0-1146.162~16.04.1
ubuntu/linux-hwe<4.15.0-206.217~16.04.1
4.15.0-206.217~16.04.1
ubuntu/linux-oracle<4.15.0-1115.126~16.04.1
4.15.0-1115.126~16.04.1
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-hwe-edge*
ubuntu/linux-kvm*
ubuntu/linux-fips*
ubuntu/linux-fips*
ubuntu/linux<4.15.0-204.215
4.15.0-204.215
ubuntu/linux-aws<4.15.0-1150.163
4.15.0-1150.163
ubuntu/linux-aws-5.4<5.4.0-1093.102~18.04.2
5.4.0-1093.102~18.04.2
ubuntu/linux-azure-4.15<4.15.0-1161.176
4.15.0-1161.176
ubuntu/linux-azure-5.4<5.4.0-1100.106~18.04.1
5.4.0-1100.106~18.04.1
ubuntu/linux-gcp-4.15<4.15.0-1145.161
4.15.0-1145.161
ubuntu/linux-gcp-5.4<5.4.0-1097.106~18.04.1
5.4.0-1097.106~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-136.153~18.04.1
5.4.0-136.153~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1041.46~18.04.1
5.4.0-1041.46~18.04.1
ubuntu/linux-kvm<4.15.0-1135.140
4.15.0-1135.140
ubuntu/linux-oracle<4.15.0-1114.125
4.15.0-1114.125
ubuntu/linux-oracle-5.4<5.4.0-1091.100~18.04.1
5.4.0-1091.100~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1078.89~18.04.1
5.4.0-1078.89~18.04.1
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<4.15.0-2089.95
4.15.0-2089.95
ubuntu/linux-azure-fips<4.15.0-2070.76
4.15.0-2070.76
ubuntu/linux-fips<4.15.0-1107.118
4.15.0-1107.118
ubuntu/linux-gcp-fips<4.15.0-2054.59
4.15.0-2054.59
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-136.153
5.4.0-136.153
ubuntu/linux-aws<5.4.0-1093.101
5.4.0-1093.101
ubuntu/linux-aws-5.15<5.15.0-1027.31~20.04.1
5.15.0-1027.31~20.04.1
ubuntu/linux-azure<5.4.0-1100.106
5.4.0-1100.106
ubuntu/linux-azure-5.15<5.15.0-1030.37~20.04.1
5.15.0-1030.37~20.04.1
ubuntu/linux-bluefield<5.4.0-1054.60
5.4.0-1054.60
ubuntu/linux-gcp<5.4.0-1097.106
5.4.0-1097.106
ubuntu/linux-gcp-5.15<5.15.0-1027.34~20.04.1
5.15.0-1027.34~20.04.1
ubuntu/linux-hwe-5.15<5.15.0-57.63~20.04.1
5.15.0-57.63~20.04.1
ubuntu/linux-ibm<5.4.0-1041.46
5.4.0-1041.46
ubuntu/linux-intel-iotg-5.15<5.15.0-1023.28~20.04.1
5.15.0-1023.28~20.04.1
ubuntu/linux-iot<5.4.0-1010.12
5.4.0-1010.12
ubuntu/linux-kvm<5.4.0-1083.89
5.4.0-1083.89
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-58.64~20.04.1
5.15.0-58.64~20.04.1
ubuntu/linux-oracle<5.4.0-1091.100
5.4.0-1091.100
ubuntu/linux-oracle-5.15<5.15.0-1027.33~20.04.1
5.15.0-1027.33~20.04.1
ubuntu/linux-raspi<5.4.0-1078.89
5.4.0-1078.89
ubuntu/linux-riscv-5.15<5.15.0-1027.31~20.04.1
5.15.0-1027.31~20.04.1
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<5.4.0-1093.101+fips1
5.4.0-1093.101+fips1
ubuntu/linux-azure-fips<5.4.0-1100.106+fips1
5.4.0-1100.106+fips1
ubuntu/linux-fips<5.4.0-1069.78
5.4.0-1069.78
ubuntu/linux-gcp-fips<5.4.0-1097.106+fips1
5.4.0-1097.106+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-57.63
5.15.0-57.63
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1027.31
5.15.0-1027.31
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-azure<5.15.0-1030.37
5.15.0-1030.37
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-fde<5.15.0-1030.37.1
5.15.0-1030.37.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1026.33
5.15.0-1026.33
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gke<5.15.0-1024.29
5.15.0-1024.29
ubuntu/linux-gkeop<5.15.0-1012.16
5.15.0-1012.16
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-ibm<5.15.0-1022.25
5.15.0-1022.25
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1023.28
5.15.0-1023.28
ubuntu/linux-kvm<5.15.0-1025.30
5.15.0-1025.30
ubuntu/linux-lowlatency<5.15.0-57.63
5.15.0-57.63
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-nvidia<5.15.0-1015.15
5.15.0-1015.15
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<5.15.0-1026.32
5.15.0-1026.32
ubuntu/linux-oracle-6.5*
ubuntu/linux-raspi<5.15.0-1022.24
5.15.0-1022.24
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<5.15.0-1029.32
5.15.0-1029.32
ubuntu/linux-raspi-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 5.19.11-1
  2. Upgrade

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

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
  3. Upgrade

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

    Fixed in 4.15.0-1162.177~14.04.1
  4. Upgrade

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

    Fixed in 4.15.0-1151.164~16.04.1
  5. Upgrade

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

    Fixed in 4.15.0-1162.177~16.04.1
  6. Upgrade

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

    Fixed in 4.15.0-1146.162~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-206.217~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-1115.126~16.04.1
  9. Upgrade

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

    Fixed in 4.15.0-204.215
  10. Upgrade

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

    Fixed in 4.15.0-1150.163
  11. Upgrade

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

    Fixed in 5.4.0-1093.102~18.04.2
  12. Upgrade

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

    Fixed in 4.15.0-1161.176
  13. Upgrade

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

    Fixed in 5.4.0-1100.106~18.04.1
  14. Upgrade

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

    Fixed in 4.15.0-1145.161
  15. Upgrade

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

    Fixed in 5.4.0-1097.106~18.04.1
  16. Upgrade

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

    Fixed in 5.4.0-136.153~18.04.1
  17. Upgrade

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

    Fixed in 5.4.0-1041.46~18.04.1
  18. Upgrade

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

    Fixed in 4.15.0-1135.140
  19. Upgrade

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

    Fixed in 4.15.0-1114.125
  20. Upgrade

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

    Fixed in 5.4.0-1091.100~18.04.1
  21. Upgrade

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

    Fixed in 5.4.0-1078.89~18.04.1
  22. Upgrade

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

    Fixed in 4.15.0-2089.95
  23. Upgrade

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

    Fixed in 4.15.0-2070.76
  24. Upgrade

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

    Fixed in 4.15.0-1107.118
  25. Upgrade

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

    Fixed in 4.15.0-2054.59
  26. Upgrade

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

    Fixed in 5.4.0-136.153
  27. Upgrade

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

    Fixed in 5.4.0-1093.101
  28. Upgrade

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

    Fixed in 5.15.0-1027.31~20.04.1
  29. Upgrade

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

    Fixed in 5.4.0-1100.106
  30. Upgrade

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

    Fixed in 5.15.0-1030.37~20.04.1
  31. Upgrade

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

    Fixed in 5.4.0-1054.60
  32. Upgrade

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

    Fixed in 5.4.0-1097.106
  33. Upgrade

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

    Fixed in 5.15.0-1027.34~20.04.1
  34. Upgrade

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

    Fixed in 5.15.0-57.63~20.04.1
  35. Upgrade

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

    Fixed in 5.4.0-1041.46
  36. Upgrade

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

    Fixed in 5.15.0-1023.28~20.04.1
  37. Upgrade

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

    Fixed in 5.4.0-1010.12
  38. Upgrade

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

    Fixed in 5.4.0-1083.89
  39. Upgrade

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

    Fixed in 5.15.0-58.64~20.04.1
  40. Upgrade

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

    Fixed in 5.4.0-1091.100
  41. Upgrade

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

    Fixed in 5.15.0-1027.33~20.04.1
  42. Upgrade

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

    Fixed in 5.4.0-1078.89
  43. Upgrade

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

    Fixed in 5.15.0-1027.31~20.04.1
  44. Upgrade

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

    Fixed in 5.4.0-1093.101+fips1
  45. Upgrade

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

    Fixed in 5.4.0-1100.106+fips1
  46. Upgrade

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

    Fixed in 5.4.0-1069.78
  47. Upgrade

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

    Fixed in 5.4.0-1097.106+fips1
  48. Upgrade

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

    Fixed in 5.15.0-57.63
  49. Upgrade

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

    Fixed in 5.15.0-1027.31
  50. Upgrade

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

    Fixed in 5.15.0-1030.37
  51. Upgrade

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

    Fixed in 5.15.0-1030.37.1
  52. Upgrade

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

    Fixed in 5.15.0-1026.33
  53. Upgrade

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

    Fixed in 5.15.0-1024.29
  54. Upgrade

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

    Fixed in 5.15.0-1012.16
  55. Upgrade

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

    Fixed in 5.15.0-1022.25
  56. Upgrade

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

    Fixed in 5.15.0-1023.28
  57. Upgrade

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

    Fixed in 5.15.0-1025.30
  58. Upgrade

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

    Fixed in 5.15.0-57.63
  59. Upgrade

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

    Fixed in 5.15.0-1015.15
  60. Upgrade

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

    Fixed in 5.15.0-1026.32
  61. Upgrade

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

    Fixed in 5.15.0-1022.24
  62. Upgrade

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

    Fixed in 5.15.0-1029.32

Event History

Jun 18, 2025
CVE Published
via MITRE·10:54 AM
Data Sourced
via MITRE·10:54 AM
DescriptionSeverity
Data Sourced
via OSV·11:15 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·11:15 AM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2022-49934?

CVE-2022-49934 has been classified as a medium severity vulnerability.

2

How do I fix CVE-2022-49934?

To mitigate CVE-2022-49934, update to the latest version of the Linux kernel that includes the fix.

3

What systems are affected by CVE-2022-49934?

CVE-2022-49934 affects various versions of the Linux kernel.

4

What type of vulnerability is CVE-2022-49934?

CVE-2022-49934 is a use-after-free (UAF) vulnerability found in mac80211.

5

What is the impact of CVE-2022-49934?

The impact of CVE-2022-49934 may include potential system crashes or arbitrary code execution.

Company

Resources

Contact

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