CVE-2026-43020

EUVD-2026-26619

01.05.2026, 15:16

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

Bluetooth: MGMT: validate LTK enc_size on load

Load Long Term Keys stores the user-provided enc_size and later uses
it to size fixed-size stack operations when replying to LE LTK
requests. An enc_size larger than the 16-byte key buffer can therefore
overflow the reply stack buffer.

Reject oversized enc_size values while validating the management LTK
record so invalid keys never reach the stored key state.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.8 HIGH	LOCAL	LOW	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 2%

Affected Products (NVD)

Vendor	Product	Version
linux	linux_kernel	3.4 ≤ 𝑥 < 5.10.253
linux	linux_kernel	5.11 ≤ 𝑥 < 5.15.203
linux	linux_kernel	5.16 ≤ 𝑥 < 6.1.168
linux	linux_kernel	6.2 ≤ 𝑥 < 6.6.134
linux	linux_kernel	6.7 ≤ 𝑥 < 6.12.81
linux	linux_kernel	6.13 ≤ 𝑥 < 6.18.22
linux	linux_kernel	6.19 ≤ 𝑥 < 6.19.12
linux	linux_kernel	7.0:rc1
linux	linux_kernel	7.0:rc2
linux	linux_kernel	7.0:rc3
linux	linux_kernel	7.0:rc4
linux	linux_kernel	7.0:rc5
linux	linux_kernel	7.0:rc6

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	7.0.12-2 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

Red Hat Enterprise Linux Releases

Red Hat Product

Release

bpftool

RHEL 8

0:4.18.0-553.126.1.el8_10

fixed

kernel

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-64k

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-debug

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-debug-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-debug-devel

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-debug-devel-matched

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-debug-modules

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-debug-modules-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-debug-modules-extra

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-devel

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-devel-matched

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-modules

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-modules-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-64k-modules-extra

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-abi-stablelists

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-core

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-debug

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-debug-core

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-debug-devel

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-debug-devel-matched

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-debug-modules

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-debug-modules-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-debug-modules-extra

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-debug-uki-virt

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-devel

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-devel-matched

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-doc

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-modules

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-modules-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-modules-extra

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-64k

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-debug

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-debug-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-debug-devel

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-debug-modules

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

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

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

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

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-devel

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-modules

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-modules-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-64k-modules-extra

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-core

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-debug

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-debug-core

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-debug-devel

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-debug-kvm

RHEL 8

0:4.18.0-553.126.1.rt7.467.el8_10

fixed

kernel-rt-debug-modules

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-debug-modules-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-debug-modules-extra

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-devel

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-kvm

RHEL 8

0:4.18.0-553.126.1.rt7.467.el8_10

fixed

kernel-rt-modules

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-rt-modules-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-rt-modules-extra

RHEL 8	0:4.18.0-553.126.1.rt7.467.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-tools

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-tools-libs

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-tools-libs-devel

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-uki-virt

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-uki-virt-addons

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-zfcpdump

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-zfcpdump-core

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-zfcpdump-devel

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-zfcpdump-devel-matched

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-zfcpdump-modules

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

kernel-zfcpdump-modules-core

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

kernel-zfcpdump-modules-extra

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

libperf

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

perf

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

python3-perf

RHEL 8	0:4.18.0-553.126.1.el8_10 fixed
RHEL 9	0:5.14.0-687.12.1.el9_8 fixed

rtla

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

RHEL 9

0:5.14.0-687.12.1.el9_8

fixed

Common Weakness Enumeration

CWE-787 - Out-of-bounds Write
The software writes data past the end, or before the beginning, of the intended buffer.

Vulnerability Media Exposure

[GERMAN] Linux Kernel: Mehrere Schwachstellen
Ein entfernter Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Sicherheitsmechanismen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen oder Auswirkungen unbestimmter Art zu erzielen.
Published: 2026-05-03T22:00:00+00:00

References

https://git.kernel.org/stable/c/0f37d1e65c6d71ad94ccfb5c602163c525db789d

https://git.kernel.org/stable/c/257cdb960d8ff6d60bb6461b03c814b6cf0c9e64

https://git.kernel.org/stable/c/40ba329e8b4cd2fb11b0caf5e6a543ceaebb6009

https://git.kernel.org/stable/c/50fb64defa72a3fecd0af1ca7c6b47b5c5c2b257

https://git.kernel.org/stable/c/82f342b3b006ca1d65f4890c05f2ec32fcb808b6

https://git.kernel.org/stable/c/b8dbe9648d69059cfe3a28917bfbf7e61efd7f15

https://git.kernel.org/stable/c/c34577f517b556fb6ca173d45bf7e766ae2564ce

https://git.kernel.org/stable/c/f71695e81f4cb428f3c7e2138eae88199005b52c