CVE-2026-53305

What the bug is

When trying to unbind a device in order to bind to it vfio-platform as: echo bc0000.geniqup > /sys/bus/platform/devices/bc0000.geniqup/driver/unbind I get the following Oops: [ 436.478639] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 [ 436.487762] Mem abort info: [ 436.490716] ESR = 0x0000000096000004 [ 436.494595] EC = 0x25: DABT (current EL), IL = 32 bits [ 436.500071] SET = 0, FnV = 0 [ 436.503250] EA = 0, S1PTW = 0 [ 436.506505] FSC = 0x04: level 0 translation fault [ 436.511533] Data abort info: [ 436.514558] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 [ 436.520215] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 436.525436] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 436.530918] user pgtable: 4k pages, 48-bit VAs, pgdp=00000008861a9000 [ 436.537554] [0000000000000020] pgd=0000000000000000, p4d=0000000000000000 [ 436.544548] Internal error: Oops: 0000000096000004 [#1] SMP [ 436.550374] Modules linked in: [ 436.553542] CPU: 2 UID: 0 PID: 671 Comm: bash Tainted: G W 7.0.0-rc3-g56fcdd0911a5-dirty #2 PREEMPT [ 436.564440] Tainted: [W]=WARN [ 436.567515] Hardware name: LENOVO 91B6CTO1WW/3796, BIOS O6NKT3BA 05/02/2025 [ 436.574675] pstate: 21400005 (nzCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) [ 436.581841] pc : ps883x_retimer_remove+0x14/0x94 [ 436.586605] lr : i2c_device_remove+0x28/0x84 [ 436.591017] sp : ffff8000847137c0 That's because the ps883x_retimer_remove() retrieves the driver data from i2c_get_clientdata() which was never set at probe. So, add i2c_set_clientdata() at the end of the probe.

Where it lives

The fix touches these files. If the subsystem is one you do not use, the practical exposure is lower, though the package is still the vulnerable one.

drivers/usb/typec/mux/ps883x.c

What this is

USB TYPEC CLASSMAINTAINERS section matched on drivers/usb/typec/ · linux-usb@vger.kernel.org · Maintained

Kernel module

ps883x

Check it on the machine

grep -wE 'CONFIG_OF|CONFIG_PCI|CONFIG_TYPEC|CONFIG_TYPEC_MUX_PS883X|CONFIG_USB|CONFIG_USB_GADGET|CONFIG_USB_PHY|CONFIG_USB_SUPPORT' /boot/config-$(uname -r)

Reads the booted kernel's own configuration, on the machine and nowhere else. =y is built in, =m is a module, and an is not set line means the code is not there.

lsmod | grep -w ps883x

Prints a line if that module is loaded right now, and nothing if it is not. One that is not loaded can still be loaded later by anything that needs it.

Show whether Debian builds this, per release

Debian builds this, but not on every flavour. At least one release below builds the code on some of its kernel flavours and not on others, so the answer depends on the architecture and flavour installed. The build rule could not be established for 2 releases, so nothing is claimed about those.

• bookworm, trixie?
• forky, sidMnot built on amd64/amd64, amd64/cloud-amd64, amd64/rt-amd64, arm64/cloud-arm64, armhf/armmp, armhf/armmp-lpae, loong64/loong64, ppc64el/powerpc64le, ppc64el/powerpc64le-64k, riscv64/riscv64, s390x/s390x

?

not established - no Makefile entry for the affected file

M

a module where it is built at all; some flavours do not build it

Where a release above reads "not established", no build rule for the affected file was found in that release's kernel tree. That is a gap in this lookup, not a finding that the code is absent.

Build switches

CONFIG_OF, CONFIG_PCI, CONFIG_TYPEC, CONFIG_TYPEC_MUX_PS883X, CONFIG_USB, CONFIG_USB_GADGET, CONFIG_USB_PHY, CONFIG_USB_SUPPORT

Reads as

all on means the file is compiled; any one off means it is not.

From the configuration Debian publishes for every kernel flavour it builds. It covers only the architectures Debian ships a linux-config package for, and nothing about a kernel you built yourself. Debian's own status above stays authoritative about the source package.MAINTAINERS kbuild Makefiles Debian linux-config packages

Signals

Published

2026-06-26 (4 months ago)source

CVSS

no vector published, unrated

Attack vector

not published

EPSS

0.16%, higher than 4.8% of all CVEssource

CISA KEV

not listedthe KEV catalogue

Debian urgency

unimportantsource

Subsystem

drivers/usb

Upstream fixes

The versions the CNA records as introducing and fixing this, and the commit for each. source

Introduced	Fixed in	Commit
6.15	6.18.33	37a3d1b68277
6.15	7.0.10	c404d0ac0cb0
6.15	7.1	381133848a03