CVE-2026-93158

What the bug is

sa_ul_probe() calls sa_init_mem() to create the DMA pool used for security context buffers, but ignores its return value. If pool creation fails, probe still continues with DMA setup, algorithm registration and child population even though later request setup depends on that pool. Stop probing when sa_init_mem() fails, and route that failure to the PM cleanup path without attempting to destroy an uncreated DMA pool.

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/crypto/sa2ul.c

What this is

CRYPTO APIMAINTAINERS section matched on drivers/crypto/ · linux-crypto@vger.kernel.org · Maintained

Kernel module

none to look for. The file would have gone into sa2ul, and Debian does not compile it into that module, so finding sa2ul in lsmod would say nothing about this CVE.

Check it on the machine

grep -wE 'CONFIG_CRYPTO|CONFIG_CRYPTO_DEV_SA2UL' /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 5 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, sid, bookworm · linux-6.12n

n

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

Build switches

CONFIG_CRYPTO, CONFIG_CRYPTO_DEV_SA2UL

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

2026-09-17 (31 days ago)source

CVSS

no vector published, unrated

Attack vector

not published

EPSS

0.22%, higher than 11.6% of all CVEssource

CISA KEV

not listedthe KEV catalogue

Debian urgency

not yet assignedsource

Subsystem

drivers/crypto

Upstream fixes

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

Introduced	Fixed in	Commit
5.9	5.10.270	304dcd26bfc3
5.9	5.15.221	9907426b438e
5.9	6.1.188	9a692a6a2b47
5.9	6.6.157	04c46784ec24
5.9	6.12.110	f72c7837614a
5.9	6.18.52	91ded4742fcd
5.9	7.2.6	b68b35ed97d3
5.9	7.3	d03f980a2585

Debian advisories