CVE-2026-46167: usb: usblp: fix uninitialized heap leak via LPGETSTATUS ioctl

Q: What is the severity of CVE-2026-46167?

The severity of CVE-2026-46167 is rated at 15.

Q: What type of vulnerability is CVE-2026-46167?

CVE-2026-46167 is a heap leak vulnerability in the usblp driver of the Linux kernel.

Q: How do I fix CVE-2026-46167?

To fix CVE-2026-46167, ensure that you update the Linux kernel to a patched version that addresses this vulnerability.

Q: Which software is affected by CVE-2026-46167?

CVE-2026-46167 affects the Linux kernel, specifically the usblp driver.

Q: Can CVE-2026-46167 lead to data exposure?

Yes, CVE-2026-46167 can potentially lead to data exposure due to uninitialized heap leaks.

Published May 28, 2026

Updated

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

usb: usblp: fix uninitialized heap leak via LPGETSTATUS ioctl

Just like in a previous problem in this driver, usblpctrlmsg() will collapse the usbcontrolmsg() return value to 0/-errno, discarding the actual number of bytes transferred.

Ideally that short command should be detected and error out, but many printers are known to send "incorrect" responses back so we can't just do that.

statusbuf is kmalloc(8) at probe time and never filled before the first LPGETSTATUS ioctl.

usblpreadstatus() requests 1 byte. If a malicious printer responds with zero bytes, statusbuf is one byte of stale kmalloc heap, sign-extended into the local int status, which the LPGETSTATUS path then copytouser()s directly to the ioctl caller.

Fix this all by just zapping out the memory buffer when allocated at probe time. If a later call does a short read, the data will be identical to what the device sent it the last time, so there is no "leak" of information happening.

Affected Software

279 affected componentsFixes available

Linux Linux kernel (usblp driver)

Microsoft azl3 kernel 6.6.139.1-1<6.6.141.1-1

6.6.141.1-1

Linux Linux kernel>=2.6.12.1<5.10.258

Linux Linux kernel>=5.11<5.15.209

Linux Linux kernel>=5.16<6.1.175

Linux Linux kernel>=6.2<6.6.140

Linux Linux kernel>=6.7<6.12.88

Linux Linux kernel>=6.13<6.18.30

Linux Linux kernel>=6.19<7.0.7

Linux Linux kernel=2.6.12

Linux Linux kernel=2.6.12-rc2

Linux Linux kernel=2.6.12-rc3

Linux Linux kernel=2.6.12-rc4

Linux Linux kernel=2.6.12-rc5

Linux Linux kernel=7.1-rc1

Linux Linux kernel=7.1-rc2

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure*

ubuntu/linux-lts-xenial*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-hwe*

ubuntu/linux-azure*

ubuntu/linux-gcp*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-kvm*

ubuntu/linux-oracle*

ubuntu/linux-fips*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4*

ubuntu/linux-azure*

ubuntu/linux-azure-4.15*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

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ubuntu/linux-ibm-5.4*

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ubuntu/linux-oem*

ubuntu/linux-oracle*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4*

ubuntu/linux-raspi-5.4*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

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ubuntu/linux-gcp-fips*

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ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

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ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm*

ubuntu/linux-ibm-5.15<5.15.0-1106.110~20.04.1

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ubuntu/linux-intel-5.13*

ubuntu/linux-intel-iotg-5.15<5.15.0-1107.113~20.04.1

5.15.0-1107.113~20.04.1

ubuntu/linux-iot*

ubuntu/linux-kvm*

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-184.194~20.04.1

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ubuntu/linux-nvidia-tegra-5.15<5.15.0-1064.66~20.04.1

5.15.0-1064.66~20.04.1

ubuntu/linux-oem-5.10*

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ubuntu/linux-riscv-5.8*

ubuntu/linux-xilinx-zynqmp*

ubuntu/linux-aws-fips*

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ubuntu/linux-gkeop<5.15.0-1095.103

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6.8.0-136.136~22.04.1

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ubuntu/linux-ibm-6.8<6.8.0-1061.62~22.04.1

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ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1107.113

5.15.0-1107.113

ubuntu/linux-kvm<5.15.0-1104.109

5.15.0-1104.109

ubuntu/linux-lowlatency<5.15.0-184.194

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ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

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ubuntu/linux-nvidia<5.15.0-1107.108

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ubuntu/linux-nvidia-6.2*

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ubuntu/linux-nvidia-tegra<5.15.0-1064.66

5.15.0-1064.66

ubuntu/linux-nvidia-tegra-igx<5.15.0-1053.53

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ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1109.115

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ubuntu/linux-realtime*

ubuntu/linux-riscv*

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6.8.1-1056.57~22.04.2

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1112.119+fips1

5.15.0-1112.119+fips1

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5.15.0-1117.126+fips1

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5.15.0-186.196+fips1

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5.15.0-1112.122+fips1

ubuntu/linux<6.8.0-136.136

6.8.0-136.136

ubuntu/linux-aws<6.8.0-1061.64

6.8.0-1061.64

ubuntu/linux-aws-6.14*

ubuntu/linux-aws-6.17*

ubuntu/linux-azure<6.8.0-1063.71

6.8.0-1063.71

ubuntu/linux-azure-6.11*

ubuntu/linux-azure-6.14*

ubuntu/linux-azure-6.17*

ubuntu/linux-azure-7.0<7.0.0-1014.14~24.04.1

7.0.0-1014.14~24.04.1

ubuntu/linux-azure-fde<6.8.0-1062.69

6.8.0-1062.69

ubuntu/linux-azure-fde-6.14*

ubuntu/linux-azure-fde-7.0<7.0.0-1013.13~24.04.1

7.0.0-1013.13~24.04.1

ubuntu/linux-azure-nvidia*

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ubuntu/linux-gcp<6.8.0-1064.72

6.8.0-1064.72

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ubuntu/linux-gkeop<6.8.0-1046.50

6.8.0-1046.50

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ubuntu/linux-hwe-6.17*

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ubuntu/linux-lowlatency<6.8.0-136.136.2

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ubuntu/linux-lowlatency-hwe-6.11*

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ubuntu/linux-nvidia-tegra<6.8.0-1030.31

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ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14*

ubuntu/linux-oem-6.17*

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle<6.8.0-1058.61

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ubuntu/linux-oracle-6.14*

ubuntu/linux-oracle-6.17*

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7.0.0-1011.11~24.04.1

ubuntu/linux-raspi<6.8.0-1061.65

6.8.0-1061.65

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-6.14*

ubuntu/linux-riscv-6.17*

ubuntu/linux-riscv-7.0<7.0.0-28.28.1~24.04.3

7.0.0-28.28.1~24.04.3

ubuntu/linux-vmware<6.8.0-1008.8

6.8.0-1008.8

ubuntu/linux-xilinx<6.8.0-1033.34

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ubuntu/linux-bluefield<6.8.0-1028.33

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ubuntu/linux-raspi-realtime<6.8.0-2050.52

6.8.0-2050.52

ubuntu/linux-realtime<6.8.1-1056.57

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ubuntu/linux-realtime-6.14*

ubuntu/linux-realtime-6.17*

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6.8.0-1061.64+fips1

ubuntu/linux-azure-fips<6.8.0-1063.71+fips2

6.8.0-1063.71+fips2

ubuntu/linux-fips<6.8.0-136.136+fips2

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ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp*

ubuntu/linux-oracle*

ubuntu/linux-raspi*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux<7.0.0-28.28

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7.0.0-1010.10

ubuntu/linux-azure-fde<7.0.0-1009.9

7.0.0-1009.9

ubuntu/linux-gcp<7.0.0-1008.8

7.0.0-1008.8

ubuntu/linux-gke<7.0.0-1003.4

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7.0.0-1010.10

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7.0.0-1008.8

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7.0.0-28.28.1

ubuntu/linux-riscv<7.0.0-28.28.1

7.0.0-28.28.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.141.1-1
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Fixed in 5.15.0-1112.119~20.04.1
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Fixed in 5.15.0-1117.126~20.04.1
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Upgrade ubuntu/linux-azure-fde-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1117.126~20.04.2
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Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1112.122~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-186.196~20.04.1
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Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1106.110~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1107.113~20.04.1
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-184.194~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1064.66~20.04.1
Upgrade
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Fixed in 5.15.0-1109.115~20.04.1
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1106.110~20.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-186.196
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1112.119
Upgrade
Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1061.64~22.04.1
Upgrade
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Fixed in 5.15.0-1117.126
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Fixed in 6.8.0-1063.71~22.04.1
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Fixed in 5.15.0-1117.126
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Upgrade ubuntu/linux-azure-fde-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1062.69~22.04.1
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Fixed in 5.15.0-1112.122
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Fixed in 6.8.0-1064.72~22.04.1
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Fixed in 5.15.0-1108.114
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Fixed in 5.15.0-1095.103
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Fixed in 6.8.0-136.136~22.04.1
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Fixed in 5.15.0-1106.110
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Fixed in 6.8.0-1061.62~22.04.1
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Fixed in 5.15.0-1107.113
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Fixed in 5.15.0-1104.109
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Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-184.194
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Upgrade ubuntu/linux-lowlatency-hwe-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-136.136.2~22.04.1
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Fixed in 5.15.0-1107.108
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Fixed in 6.8.0-1059.62~22.04.1
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Fixed in 5.15.0-1064.66
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Fixed in 5.15.0-1053.53
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Fixed in 5.15.0-1109.115
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Fixed in 6.8.0-1058.61~22.04.1
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Fixed in 5.15.0-1106.109
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Fixed in 6.8.0-136.136~22.04.3
Upgrade
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Fixed in 5.15.0-1075.79
Upgrade
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Fixed in 5.15.0-1096.98
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Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1104.106
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1111.120
Upgrade
Upgrade ubuntu/linux-realtime-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.1-1056.57~22.04.2
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1112.119+fips1
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Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1117.126+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-186.196+fips1
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1112.122+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 6.8.0-136.136
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 6.8.0-1061.64
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Fixed in 6.8.0-1063.71
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Fixed in 7.0.0-1014.14~24.04.1
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Fixed in 6.8.0-1062.69
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Fixed in 7.0.0-1013.13~24.04.1
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Fixed in 6.8.0-1064.72
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Fixed in 7.0.0-1011.11~24.04.1
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Fixed in 6.8.0-1059.67
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Fixed in 6.8.0-1046.50
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Fixed in 7.0.0-28.28~24.04.1
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Fixed in 6.8.0-1061.62
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Fixed in 6.8.0-136.136.2
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Fixed in 6.8.0-1059.62
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Fixed in 7.0.0-1016.16~24.04.1
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Fixed in 6.8.0-1059.62.1
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Fixed in 6.8.0-1030.31
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Fixed in 6.8.0-1058.61
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Fixed in 7.0.0-1011.11~24.04.1
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Fixed in 6.8.0-1061.65
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Fixed in 7.0.0-28.28.1~24.04.3
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Fixed in 6.8.0-1008.8
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Fixed in 6.8.0-1033.34
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Fixed in 6.8.0-1028.33
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Fixed in 6.8.0-2050.52
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Fixed in 6.8.1-1056.57
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Fixed in 6.8.0-1061.64+fips1
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Fixed in 6.8.0-1063.71+fips2
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Fixed in 6.8.0-136.136+fips2
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Fixed in 6.8.0-1064.72+fips1
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Fixed in 7.0.0-28.28
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Fixed in 7.0.0-1009.9
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Fixed in 7.0.0-1010.10
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Fixed in 7.0.0-1009.9
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Fixed in 7.0.0-1008.8
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Fixed in 7.0.0-1003.4
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Fixed in 7.0.0-1010.10
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Fixed in 7.0.0-1016.16
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Fixed in 7.0.0-2016.16
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Fixed in 7.0.0-1009.9
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Fixed in 7.0.0-1008.8
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Fixed in 7.0.0-1015.15
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Fixed in 7.0.0-28.28.1
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Fixed in 7.0.0-28.28.1
Compensating control
Modify the Linux usb usblp driver to zero-initialize (zap) the 8-byte statusbuf memory buffer when it is allocated at probe time, before any LPGETSTATUS ioctl can read it.

Event History

May 28, 2026

CVE Published

via MITRE·09:36 AM

Data Sourced

via MITRE·09:36 AM

Description

Data Sourced

via NVD·10:16 AM

RemedyDescriptionSeverityWeaknessAffected Software

May 29, 2026

Data Sourced

via Microsoft·08:07 AM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2026-46167?

The severity of CVE-2026-46167 is rated at 15.

What type of vulnerability is CVE-2026-46167?

CVE-2026-46167 is a heap leak vulnerability in the usblp driver of the Linux kernel.

How do I fix CVE-2026-46167?

To fix CVE-2026-46167, ensure that you update the Linux kernel to a patched version that addresses this vulnerability.

Which software is affected by CVE-2026-46167?

CVE-2026-46167 affects the Linux kernel, specifically the usblp driver.

Can CVE-2026-46167 lead to data exposure?

Yes, CVE-2026-46167 can potentially lead to data exposure due to uninitialized heap leaks.

CVE-2026-46167: usb: usblp: fix uninitialized heap leak via LPGETSTATUS ioctl

Affected Software

Remediation

Event History

Frequently Asked Questions

What is the severity of CVE-2026-46167?

What type of vulnerability is CVE-2026-46167?

How do I fix CVE-2026-46167?

Which software is affected by CVE-2026-46167?

Can CVE-2026-46167 lead to data exposure?

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