CVE-2026-46151

MEDIUM EPSS 2.4%
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 heap leak in IEEE 1284 device ID via short response usblp_ctrl_msg() collapses the usb_control_msg() return value to 0/-errno, discarding the actual number of bytes transferred. A broken printer can complete the GET_DEVICE_ID control transfer short and the driver has no way to know. usblp_cache_device_id_string() reads the 2-byte big-endian length prefix from the response and trusts it (clamped only to the buffer bounds). The buffer is kmalloc(1024) at probe time. A device that sends exactly two bytes (e.g. 0x03 0xFF, claiming a 1023-byte ID) leaves device_id_string[2..1022] holding stale kmalloc heap. That stale data is then exposed: - via the ieee1284_id sysfs attribute (sprintf("%s", buf+2), truncated at the first NUL in the stale heap), and - via the IOCNR_GET_DEVICE_ID ioctl, which copy_to_user()s the full claimed length regardless of NULs, up to 1021 bytes of uninitialized heap, with the leak size chosen by the device. Fix this up by just zapping the buffer with zeros before each request sent to the device.

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
2.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

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/4220d4dd062ea3d3eb056a6cbe0b568e740d20b1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4650cce898fcd0bb8c33e529984687a8caed10c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/522d17e93a85575256894212d10e5a1fa6f36529
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/612640abbd9e0947fe8f37aaf0cf324265d7caa4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d8142141c942c0d8e79343cffda9c44bb1f3f4f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6e29c32a27218f2dcd4a4e9b0b3c5e7728640698
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7a400c6fe3617e31e690e3f7ca37bb335e0498f3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8247f52d822180e94ccbfdab91613af386a4e34d
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/4220d4dd062ea3d3eb056a6cbe0b568e740d20b1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4650cce898fcd0bb8c33e529984687a8caed10c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/522d17e93a85575256894212d10e5a1fa6f36529
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/612640abbd9e0947fe8f37aaf0cf324265d7caa4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6d8142141c942c0d8e79343cffda9c44bb1f3f4f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6e29c32a27218f2dcd4a4e9b0b3c5e7728640698
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7a400c6fe3617e31e690e3f7ca37bb335e0498f3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8247f52d822180e94ccbfdab91613af386a4e34d
    Patch