CVE-2026-43156
Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: pegasus: enable basic endpoint checking pegasus_probe() fills URBs with hardcoded endpoint pipes without verifying the endpoint descriptors: - usb_rcvbulkpipe(dev, 1) for RX data - usb_sndbulkpipe(dev, 2) for TX data - usb_rcvintpipe(dev, 3) for status interrupts A malformed USB device can present these endpoints with transfer types that differ from what the driver assumes. Add a pegasus_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls before any resource allocation to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time, and avoid triggering assertion. Similar fix to - commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking") - commit 9e7021d2aeae ("net: usb: catc: enable basic endpoint checking")
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
Linux kernel Affected 3 releases
| Version | Status | Fixed in |
|---|---|---|
| 7.0 | Affected | — |
| 2.6.12 | Affected | — |
| — | Affected | 5.10.252 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.12.85-1 |
| sid | Fixed | 6.19.6-1 |
| forky | Fixed | 6.19.6-1 |
| bullseye | Fixed | 5.10.257-1 |
| bookworm | Fixed | 6.1.170-1 |
References
- https://git.kernel.org/stable/c/229dc9b9db475ac900182bafe258943e0e054c6d
- https://git.kernel.org/stable/c/26b3ec62fa1a94ac801feca47f040fc729b3c174
- https://git.kernel.org/stable/c/2705709f6574a088aab246af72fc95f2fea51484
- https://git.kernel.org/stable/c/35854ed5c40b02f95824e44398f9d2ba33727203
- https://git.kernel.org/stable/c/3d7e6ce34f4fcc7083510c28b17a7c36462a25d4
- https://git.kernel.org/stable/c/67ba6b13dbcaf45681fb6758794c5ac5fa589a6c
- https://git.kernel.org/stable/c/a3e64e950a3981a8199de9798f6d21261b959171
- https://git.kernel.org/stable/c/d2e7c898cc02dfe42443489a67a45ed616cb76e9
- https://www.suse.com/security/cve/CVE-2026-43156.html
- https://security-tracker.debian.org/tracker/CVE-2026-43156
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.