CVE-2026-46167

MEDIUM EPSS 2.8%
Published May 28, 20261mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 28, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

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, usblp_ctrl_msg() will collapse the usb_control_msg() 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. usblp_read_status() 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 copy_to_user()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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 14

VendorProductVersionRange
linuxlinux_kernel*≥2.6.12.1  –  <5.10.258
linuxlinux_kernel*≥5.11  –  <5.15.209
linuxlinux_kernel*≥5.16  –  <6.1.175
linuxlinux_kernel*≥6.2  –  <6.6.140
linuxlinux_kernel*≥6.7  –  <6.12.88
linuxlinux_kernel*≥6.13  –  <6.18.30
linuxlinux_kernel*≥6.19  –  <7.0.7
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel7.1any
linuxlinux_kernel7.1any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/087d97342c100138ea7d75a50977c9c2319f957b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0f7c41314ebf17049917a452684db371babf711a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf24991619be317e2769310b4a367bf4a04b82bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/087d97342c100138ea7d75a50977c9c2319f957b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0f7c41314ebf17049917a452684db371babf711a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cf24991619be317e2769310b4a367bf4a04b82bc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a
    Patch