Not yet scoredPublished Dec 30, 2025

CVE-2023-54277fbdev: udlfb: Fix endpoint check

Updated under an hour ago (Oct 27, 2026, 3:40 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: fbdev: udlfb: Fix endpoint check The syzbot fuzzer detected a problem in the udlfb driver, caused by an endpoint not having the expected type: usb 1-1: Read EDID byte 0 failed: -71 usb 1-1: Unable to get valid EDID from device/display ------------[ cut here ]------------ usb 1-1: BOGUS urb xfer, pipe 3 != type 1 WARNING: CPU: 0 PID: 9 at drivers/usb/core/urb.c:504 usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504 Modules linked in: CPU: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.4.0-rc1-syzkaller-00016-ga4422ff22142 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504 ... Call Trace: <TASK> dlfb_submit_urb+0x92/0x180 drivers/video/fbdev/udlfb.c:1980 dlfb_set_video_mode+0x21f0/0x2950 drivers/video/fbdev/udlfb.c:315 dlfb_ops_set_par+0x2a7/0x8d0 drivers/video/fbdev/udlfb.c:1111 dlfb_usb_probe+0x149a/0x2710 drivers/video/fbdev/udlfb.c:1743 The current approach for this issue failed to catch the problem because it only checks for the existence of a bulk-OUT endpoint; it doesn't check whether this endpoint is the one that the driver will actually use. We can fix the problem by instead checking that the endpoint used by the driver does exist and is bulk-OUT.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f6db63819db632158647d5bbf4d7d2d90dc1a268 before 1522dc58bff87af79461b96d90ec122e9e726004; from c4fb41bdf4d6ccca850c4af5d707d14a0fb717a7 before 58ecc165abdaed85447455e6dc396758e8c6f219; from 4df1584738f1dc6f0dd854d258bba48591f1ed0e before 9e12c58a5ece41be72157cef348576b135c9fc72; from aaf7dbe07385e0b8deb7237eca2a79926bbc7091 before c8fdf7feca77cd99e25ef0a1e9e72dfc83add8ef; from aaf7dbe07385e0b8deb7237eca2a79926bbc7091 before e19383e5dee5adbf3d19f3f210f440a88d1b7dde; from aaf7dbe07385e0b8deb7237eca2a79926bbc7091 before ed9de4ed39875706607fb08118a58344ae6c5f42; 895ea8a290ba87850bcaf2ecfcddef75a014fa54; from 5.4.192 before 5.4.244; and 3 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/1522dc58bff87af79461b96d90ec122e9e726004
https://git.kernel.org/stable/c/58ecc165abdaed85447455e6dc396758e8c6f219
https://git.kernel.org/stable/c/9e12c58a5ece41be72157cef348576b135c9fc72
https://git.kernel.org/stable/c/c8fdf7feca77cd99e25ef0a1e9e72dfc83add8ef
https://git.kernel.org/stable/c/e19383e5dee5adbf3d19f3f210f440a88d1b7dde
https://git.kernel.org/stable/c/ed9de4ed39875706607fb08118a58344ae6c5f42

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.