CVE-2026-46167
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 7.0.7-1 |
| debian | sid | fixed | 7.0.7-1 |
| debian | trixie | fixed | 6.12.88-1 |
| sles | affected | |
References
- https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba
- https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f
- https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2
- https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5
- https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a
- https://security-tracker.debian.org/tracker/CVE-2026-46167
- https://www.suse.com/security/cve/CVE-2026-46167.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.