CVE-2025-21993

EUVD-2025-9544

02.04.2025, 13:15

In the Linux kernel, the following vulnerability has been resolved:

iscsi_ibft: Fix UBSAN shift-out-of-bounds warning in ibft_attr_show_nic()

When performing an iSCSI boot using IPv6, iscsistart still reads the
/sys/firmware/ibft/ethernetX/subnet-mask entry. Since the IPv6 prefix
length is 64, this causes the shift exponent to become negative,
triggering a UBSAN warning. As the concept of a subnet mask does not
apply to IPv6, the value is set to ~0 to suppress the warning message.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.1 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 4%

Affected Products (NVD)

Vendor	Product	Version
linux	linux_kernel	𝑥 < 6.1.132
linux	linux_kernel	6.2 ≤ 𝑥 < 6.6.84
linux	linux_kernel	6.7 ≤ 𝑥 < 6.12.20
linux	linux_kernel	6.13 ≤ 𝑥 < 6.13.8
linux	linux_kernel	6.14:rc1

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

linux

bookworm	6.1.170-3 fixed
bookworm (security)	6.1.174-1 fixed
bullseye	vulnerable
bullseye (security)	5.10.257-1 fixed
forky	7.0.10-1 fixed
sid	7.0.10-1 fixed
trixie	6.12.86-1 fixed
trixie (security)	6.12.90-2 fixed

linux-6.1

bullseye (security)

6.1.174-1~deb11u1

fixed

openSUSE / SLES Releases

openSUSE Product

Release

cluster-md-kmp-default

suse enterprise server 12 SP5

4.12.14-122.255.1

fixed

dlm-kmp-default

suse enterprise server 12 SP5

4.12.14-122.255.1

fixed

gfs2-kmp-default

suse enterprise server 12 SP5

4.12.14-122.255.1

fixed

kernel-64kb

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1 fixed

kernel-azure

suse enterprise sap 15 SP6	6.4.0-150600.8.37.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.20.3.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.8.37.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.20.3.1 fixed

kernel-default

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise server 12 SP5	4.12.14-122.255.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1 fixed

kernel-default-base

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1.150600.12.22.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1.150700.17.2.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1.150600.12.22.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1.150700.17.2.1 fixed
suse enterprise server 12 SP5	4.12.14-122.255.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1.150600.12.22.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1.150700.17.2.1 fixed

kernel-default-man

suse enterprise server 12 SP5

4.12.14-122.255.1

fixed

kernel-docs

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1 fixed

kernel-macros

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise server 12 SP5	4.12.14-122.255.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1 fixed

kernel-obs-build

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1 fixed

kernel-source

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise server 12 SP5	4.12.14-122.255.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1 fixed

kernel-source-azure

suse enterprise sap 15 SP6	6.4.0-150600.8.37.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.20.3.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.8.37.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.20.3.1 fixed

kernel-syms

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise server 12 SP5	4.12.14-122.255.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1 fixed

kernel-syms-azure

suse enterprise sap 15 SP6	6.4.0-150600.8.37.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.20.3.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.8.37.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.20.3.1 fixed

kernel-zfcpdump

suse enterprise desktop 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise desktop 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise sap 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise sap 15 SP7	6.4.0-150700.53.3.1 fixed
suse enterprise server 15 SP6	6.4.0-150600.23.50.1 fixed
suse enterprise server 15 SP7	6.4.0-150700.53.3.1 fixed

ocfs2-kmp-default

suse enterprise server 12 SP5

4.12.14-122.255.1

fixed

Red Hat Enterprise Linux Releases

Red Hat Product

Release

kernel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-debug

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-debug-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-debug-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-debug-devel-matched

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-debug-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-debug-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-debug-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-devel-matched

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-64k-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-abi-stablelists

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-debug

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-debug-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-debug-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-debug-devel-matched

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-debug-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-debug-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-debug-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-debug-uki-virt

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-devel-matched

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-doc

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-debug

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-debug-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-debug-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-debug-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-debug-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-debug-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-64k-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-debug

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-debug-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-debug-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-debug-kvm

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-debug-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-debug-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-debug-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-kvm

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-rt-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-tools

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-tools-libs

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-tools-libs-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-uki-virt

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-uki-virt-addons

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-zfcpdump

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-zfcpdump-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-zfcpdump-devel

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-zfcpdump-devel-matched

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-zfcpdump-modules

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-zfcpdump-modules-core

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

kernel-zfcpdump-modules-extra

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

libperf

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

perf

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

python3-perf

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

rtla

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

RHEL 9

0:5.14.0-570.16.1.el9_6

fixed

Common Weakness Enumeration

CWE-125 - Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer.

References

https://git.kernel.org/stable/c/07e0d99a2f701123ad3104c0f1a1e66bce74d6e5

https://git.kernel.org/stable/c/2d1eef248107bdf3d5a69d0fde04c30a79a7bf5d

https://git.kernel.org/stable/c/9bfa80c8aa4e06dff55a953c3fffbfc68a3a3b1c

https://git.kernel.org/stable/c/a858cd58dea06cf85b142673deea8c5d87f11e70

https://git.kernel.org/stable/c/b253660fac5e0e9080d2c95e3a029e1898d49afb

https://git.kernel.org/stable/c/b388e185bfad32bfed6a97a6817f74ca00a4318f

https://git.kernel.org/stable/c/c1c6e527470e5eab0b2d57bd073530fbace39eab

https://git.kernel.org/stable/c/f763c82db8166e28f45b7cc4a5398a7859665940

https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html