CVE-2026-72305

What the bug is

The bounceing is not necessarily page aligned, so current VDUSE can leak kernel information through mapping bounce pages to userspace. Allocate bounce pages with __GFP_ZERO to avoid leaking information to userspace.

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/vdpa/vdpa_user/iova_domain.c
drivers/vdpa/vdpa_user/vduse_dev.c

What this is

VIRTIO COREMAINTAINERS section matched on drivers/vdpa/ · virtualization@lists.linux.dev · Maintained

Kernel module

vduse

Check it on the machine

grep -wE 'CONFIG_VDPA|CONFIG_VDPA_USER' /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 vduse

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 does not build this code in 1 release. It does build it in 4 releases, so the answer depends on which release the machine runs.

• bookwormn
• trixieMnot built on riscv64/riscv64
• forky, sid, bookworm · linux-6.12m

n

not enabled on any flavour - this release does not build the code

M

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

m

a loadable module on every flavour - check lsmod, can be blacklisted

Build switches

CONFIG_VDPA, CONFIG_VDPA_USER

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

2026-08-15 (2 months ago)source

CVSS

no vector published, unrated

Attack vector

not published

EPSS

0.21%, higher than 10.7% of all CVEssource

CISA KEV

not listedthe KEV catalogue

Debian urgency

not yet assignedsource

Subsystem

drivers/vdpa

Upstream fixes

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

Introduced	Fixed in	Commit
5.15	5.15.217	41e27a6aca60
5.15	6.1.184	3ae878f262bd
5.15	6.6.148	fde25641cbdd
5.15	6.12.101	5e88c1bc3a41
5.15	6.18.42	690fb82c4122
5.15	7.1.5	00335df9da20
5.15	7.2	9c1523803445

Debian advisories