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.
References
Configurations
Configuration 1 (hide)
|
History
10 Jun 2026, 21:14
| Type | Values Removed | Values Added |
|---|---|---|
| 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:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-908 | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/087d97342c100138ea7d75a50977c9c2319f957b - Patch | |
| References | () https://git.kernel.org/stable/c/0f7c41314ebf17049917a452684db371babf711a - Patch | |
| References | () https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba - Patch | |
| References | () https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f - Patch | |
| References | () https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2 - Patch | |
| References | () https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5 - Patch | |
| References | () https://git.kernel.org/stable/c/cf24991619be317e2769310b4a367bf4a04b82bc - Patch | |
| References | () https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a - Patch |
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 : 2026-06-10 21:14
NVD link : CVE-2026-46167
Mitre link : CVE-2026-46167
CVE.ORG link : CVE-2026-46167
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-908
Use of Uninitialized Resource