CVE-2026-98353

What the bug is

Locked QP and CQ lookups from EQ interrupts can deadlock with create-path XArray updates. If an interrupt arrives while the create path holds the plain xa_lock, the lookup spins forever trying to acquire the same lock. Use IRQ-safe XArray helpers for all QP and CQ create-path updates, including the GSI QP store and error paths. Initialize both arrays with XA_FLAGS_LOCK_IRQ so sleeping allocations preserve interrupt state.

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/infiniband/hw/erdma/erdma_main.c
drivers/infiniband/hw/erdma/erdma_verbs.c

What this is

ALIBABA ELASTIC RDMA DRIVERMAINTAINERS section matched on drivers/infiniband/hw/erdma · linux-rdma@vger.kernel.org · Supported

Kernel module

none to look for. The file would have gone into erdma, and Debian does not compile it into that module, so finding erdma in lsmod would say nothing about this CVE.

Check it on the machine

grep -wE 'CONFIG_INFINIBAND|CONFIG_INFINIBAND_ERDMA' /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.

Show whether Debian builds this, per release

Debian does not build this code. In 4 releases below, every kernel flavour Debian publishes has the switch off, so the vulnerable file is compiled into no kernel binary Debian ships.

• bookworm, trixie, forky, sidn

n

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

Build switches

CONFIG_INFINIBAND, CONFIG_INFINIBAND_ERDMA

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

2026-10-06 (13 days ago)source

CVSS

no vector published, unrated

Attack vector

not published

EPSS

0.15%, higher than 3.9% of all CVEssource

CISA KEV

not listedthe KEV catalogue

Debian urgency

not yet assignedsource

Subsystem

drivers/infiniband

Upstream fixes

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

Introduced	Fixed in	Commit
7.2.6	7.2.8	74d4085221a7
7.3	7.3	00baeade709f
6.1.188	0	0
6.6.157	0	0
6.12.110	0	0
6.18.52	0	0
6.12.110	0	0
6.18.52	0	0
7.2.6	0	0