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.
References
Configurations
Configuration 1 (hide)
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History
09 Jun 2026, 21:06
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/4220d4dd062ea3d3eb056a6cbe0b568e740d20b1 - Patch | |
| References | () https://git.kernel.org/stable/c/4650cce898fcd0bb8c33e529984687a8caed10c3 - Patch | |
| References | () https://git.kernel.org/stable/c/522d17e93a85575256894212d10e5a1fa6f36529 - Patch | |
| References | () https://git.kernel.org/stable/c/612640abbd9e0947fe8f37aaf0cf324265d7caa4 - Patch | |
| References | () https://git.kernel.org/stable/c/6d8142141c942c0d8e79343cffda9c44bb1f3f4f - Patch | |
| References | () https://git.kernel.org/stable/c/6e29c32a27218f2dcd4a4e9b0b3c5e7728640698 - Patch | |
| References | () https://git.kernel.org/stable/c/7a400c6fe3617e31e690e3f7ca37bb335e0498f3 - Patch | |
| References | () https://git.kernel.org/stable/c/8247f52d822180e94ccbfdab91613af386a4e34d - Patch | |
| CWE | CWE-401 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* |
01 Jun 2026, 17:17
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
28 May 2026, 10:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-28 10:16
Updated : 2026-06-17 10:53
NVD link : CVE-2026-46151
Mitre link : CVE-2026-46151
CVE.ORG link : CVE-2026-46151
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-401
Missing Release of Memory after Effective Lifetime