CVE-2022-49328: mt76: fix use-after-free by removing a non-RCU wcid pointer

Published Feb 26, 2025
·
Updated

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

mt76: fix use-after-free by removing a non-RCU wcid pointer

Fixes an issue caught by KASAN about use-after-free in mt76txqschedule by protecting mtxq->wcid with rculock between mt76txqschedule and stainfo[alloc, free].

[18853.876689] ================================================================== [18853.876751] BUG: KASAN: use-after-free in mt76txqschedule+0x204/0xaf8 [mt76] [18853.876773] Read of size 8 at addr ffffffaf989a2138 by task mt76-tx phy0/883 [18853.876786] [18853.876810] CPU: 5 PID: 883 Comm: mt76-tx phy0 Not tainted 5.10.100-fix-510-56778d365941-kasan #5 0b01fbbcf41a530f52043508fec2e31a4215

[18853.876840] Call trace: [18853.876861] dumpbacktrace+0x0/0x3ec [18853.876878] showstack+0x20/0x2c [18853.876899] dumpstack+0x11c/0x1ac [18853.876918] printaddressdescription+0x74/0x514 [18853.876934] kasanreport+0x134/0x174 [18853.876948] asanreportload8noabort+0x44/0x50 [18853.876976] mt76txqschedule+0x204/0xaf8 [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877002] mt76txqscheduleall+0x2c/0x48 [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877030] mt7921txworker+0xa0/0x1cc [mt7921common f0875ebac9d7b4754e1010549e7db50fbd90a047] [18853.877054] mt76workerfn+0x190/0x22c [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877071] kthread+0x2f8/0x3b8 [18853.877087] retfromfork+0x10/0x30 [18853.877098] [18853.877112] Allocated by task 941: [18853.877131] kasansavestack+0x38/0x68 [18853.877147] kasankmalloc+0xd4/0xfc [18853.877163] kasankmalloc+0x10/0x1c [18853.877177] kmalloc+0x264/0x3c4 [18853.877294] stainfoalloc+0x460/0xf88 [mac80211] [18853.877410] ieee80211prepconnection+0x204/0x1ee0 [mac80211] [18853.877523] ieee80211mgdauth+0x6c4/0xa4c [mac80211] [18853.877635] ieee80211auth+0x20/0x2c [mac80211] [18853.877733] rdevauth+0x7c/0x438 [cfg80211] [18853.877826] cfg80211mlmeauth+0x26c/0x390 [cfg80211] [18853.877919] nl80211authenticate+0x6d4/0x904 [cfg80211] [18853.877938] genlrcvmsg+0x748/0x93c [18853.877954] netlinkrcvskb+0x160/0x2a8 [18853.877969] genlrcv+0x3c/0x54 [18853.877985] netlinkunicastkernel+0x104/0x1ec [18853.877999] netlinkunicast+0x178/0x268 [18853.878015] netlinksendmsg+0x3cc/0x5f0 [18853.878030] socksendmsg+0xb4/0xd8 [18853.878043] syssendmsg+0x2f8/0x53c [18853.878058] syssendmsg+0xe8/0x150 [18853.878071] syssendmsg+0xc4/0x1f4 [18853.878087] arm64compatsyssendmsg+0x88/0x9c [18853.878101] el0svccommon+0x1b4/0x390 [18853.878115] doel0svccompat+0x8c/0xdc [18853.878131] el0svccompat+0x10/0x1c [18853.878146] el0synccompathandler+0xa8/0xcc [18853.878161] el0synccompat+0x188/0x1c0 [18853.878171] [18853.878183] Freed by task 10927: [18853.878200] kasansavestack+0x38/0x68 [18853.878215] kasansettrack+0x28/0x3c [18853.878228] kasansetfreeinfo+0x24/0x48 [18853.878244] kasanslabfree+0x11c/0x154 [18853.878259] kasanslabfree+0x14/0x24 [18853.878273] slabfreefreelisthook+0xac/0x1b0 [18853.878287] kfree+0x104/0x390 [18853.878402] stainfofree+0x198/0x210 [mac80211] [18853.878515] stainfodestroypart2+0x230/0x2d4 [mac80211] [18853.878628] stainfoflush+0x300/0x37c [mac80211] [18853.878740] ieee80211setdisassoc+0x2cc/0xa7c [mac80211] [18853.878851] ieee80211mgddeauth+0x4a4/0x10a0 [mac80211] [18853.878962] ieee80211deauth+0x20/0x2c [mac80211] [18853.879057] rdevdeauth+0x7c/0x438 [cfg80211] [18853.879150] cfg80211mlmedeauth+0x274/0x414 [cfg80211] [18853.879243] cfg80211mlmedown+0xe4/0x118 [cfg80211] [18853.879335] cfg80211disconnect+0x218/0x2d8 [cfg80211] [18853.879427] cfg80211leave+0x17c/0x240 [cfg80211] [18853.879519] cfg80211leave+0x3c/0x58 [cfg80211] [18853.879611] wiphysuspend+0xdc/0x200 [cfg80211] [18853.879628] dpmruncallback+0x58/0x408 [18853.879642] devicesuspend+0x4cc/0x864 [18853.879658] asyncsuspend+0x34/0xf4 [18 ---truncated---

Affected Software

136 affected componentsFixes available
Linux Kernel
Linux Linux kernel<5.15.58
Linux Linux kernel>=5.16<5.17.14
Linux Linux kernel>=5.18<5.18.3
debian/linux<5.18.5-1
5.18.5-1
debian/linux<5.18.5-1
5.18.5-1
debian/linux<5.18.5-1
5.18.5-1
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1
ubuntu/linux-hwe-edge*
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-aws-5.4*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-5.4*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-5.4*
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-5.4*
ubuntu/linux-hwe-edge*
ubuntu/linux-ibm-5.4*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-oracle-5.4*
ubuntu/linux-raspi-5.4*
ubuntu/linux-aws-5.15<5.15.0-1021.25~20.04.1
5.15.0-1021.25~20.04.1
ubuntu/linux-azure-5.15<5.15.0-1021.26~20.04.1
5.15.0-1021.26~20.04.1
ubuntu/linux-gcp-5.15<5.15.0-1021.28~20.04.1
5.15.0-1021.28~20.04.1
ubuntu/linux-hwe-5.15<5.15.0-50.56~20.04.1
5.15.0-50.56~20.04.1
ubuntu/linux-intel-iotg-5.15<5.15.0-1017.22~20.04.1
5.15.0-1017.22~20.04.1
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-50.56~20.04.1
5.15.0-50.56~20.04.1
ubuntu/linux-oracle-5.15<5.15.0-1019.24~20.04.1
5.15.0-1019.24~20.04.1
ubuntu/linux-riscv-5.15<5.15.0-1022.26~20.04.1
5.15.0-1022.26~20.04.1
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-bluefield*
ubuntu/linux-gcp*
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-ibm*
ubuntu/linux-intel-5.13*
ubuntu/linux-iot*
ubuntu/linux-kvm*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-xilinx-zynqmp*
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-50.56
5.15.0-50.56
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1021.25
5.15.0-1021.25
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-azure<5.15.0-1021.26
5.15.0-1021.26
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-fde<5.15.0-1024.30.1
5.15.0-1024.30.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1019.25
5.15.0-1019.25
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gke<5.15.0-1017.20
5.15.0-1017.20
ubuntu/linux-gkeop<5.15.0-1004.6
5.15.0-1004.6
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-ibm<5.15.0-1015.17
5.15.0-1015.17
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1017.22
5.15.0-1017.22
ubuntu/linux-kvm<5.15.0-1019.23
5.15.0-1019.23
ubuntu/linux-lowlatency<5.15.0-50.56
5.15.0-50.56
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<5.15.0-1019.24
5.15.0-1019.24
ubuntu/linux-oracle-6.5*
ubuntu/linux-raspi<5.15.0-1016.18
5.15.0-1016.18
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<5.15.0-1022.22
5.15.0-1022.22
ubuntu/linux-raspi-realtime*
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 5.18.5-1
  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-aws-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1021.25~20.04.1
  4. Upgrade

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

    Fixed in 5.15.0-1021.26~20.04.1
  5. Upgrade

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

    Fixed in 5.15.0-1021.28~20.04.1
  6. Upgrade

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

    Fixed in 5.15.0-50.56~20.04.1
  7. Upgrade

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

    Fixed in 5.15.0-1017.22~20.04.1
  8. Upgrade

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

    Fixed in 5.15.0-50.56~20.04.1
  9. Upgrade

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

    Fixed in 5.15.0-1019.24~20.04.1
  10. Upgrade

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

    Fixed in 5.15.0-1022.26~20.04.1
  11. Upgrade

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

    Fixed in 5.15.0-50.56
  12. Upgrade

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

    Fixed in 5.15.0-1021.25
  13. Upgrade

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

    Fixed in 5.15.0-1021.26
  14. Upgrade

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

    Fixed in 5.15.0-1024.30.1
  15. Upgrade

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

    Fixed in 5.15.0-1019.25
  16. Upgrade

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

    Fixed in 5.15.0-1017.20
  17. Upgrade

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

    Fixed in 5.15.0-1004.6
  18. Upgrade

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

    Fixed in 5.15.0-1015.17
  19. Upgrade

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

    Fixed in 5.15.0-1017.22
  20. Upgrade

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

    Fixed in 5.15.0-1019.23
  21. Upgrade

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

    Fixed in 5.15.0-50.56
  22. Upgrade

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

    Fixed in 5.15.0-1015.15
  23. Upgrade

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

    Fixed in 5.15.0-1019.24
  24. Upgrade

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

    Fixed in 5.15.0-1016.18
  25. Upgrade

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

    Fixed in 5.15.0-1022.22

Event History

Feb 26, 2025
CVE Published
via MITRE·02:10 AM
Data Sourced
via MITRE·02:10 AM
DescriptionSeverity
Data Sourced
via Red Hat·03:21 AM
DescriptionSeverityAffected Software
Data Sourced
via OSV·07:01 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·07:01 AM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2022-49328?

CVE-2022-49328 has been classified as a medium severity vulnerability due to the potential for use-after-free errors in the Linux kernel.

2

How do I fix CVE-2022-49328?

To fix CVE-2022-49328, update your Linux kernel to a version that includes the patches addressing the vulnerability.

3

Which versions of the Linux kernel are affected by CVE-2022-49328?

CVE-2022-49328 affects Linux kernel versions prior to 5.15.58 and versions between 5.16 and 5.17.14.

4

What type of vulnerability is CVE-2022-49328?

CVE-2022-49328 is a use-after-free vulnerability that can lead to memory corruption in the Linux kernel.

5

Is there an exploit available for CVE-2022-49328?

As of now, there are no public exploits documented for CVE-2022-49328, but it is advisable to patch the vulnerability immediately.

Company

Resources

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