CVE-2026-43109

EUVD-2026-27629
In the Linux kernel, the following vulnerability has been resolved:

x86: shadow stacks: proper error handling for mmap lock

김영민 reports that shstk_pop_sigframe() doesn't check for errors from
mmap_read_lock_killable(), which is a silly oversight, and also shows
that we haven't marked those functions with "__must_check", which would
have immediately caught it.

So let's fix both issues.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 1%
Affected Products (NVD)
VendorProductVersion
linuxlinux_kernel
6.6 ≤
𝑥
< 6.18.24
linuxlinux_kernel
6.19 ≤
𝑥
< 6.19.14
linuxlinux_kernel
7.0:rc1
linuxlinux_kernel
7.0:rc2
linuxlinux_kernel
7.0:rc3
linuxlinux_kernel
7.0:rc4
linuxlinux_kernel
7.0:rc5
linuxlinux_kernel
7.0:rc6
linuxlinux_kernel
7.0:rc7
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bookworm
6.1.170-3
fixed
bookworm (security)
6.1.174-1
fixed
bullseye
5.10.223-1
fixed
bullseye (security)
5.10.257-1
fixed
forky
7.0.12-2
fixed
sid
7.0.13-1
fixed
trixie
vulnerable
trixie (security)
6.12.94-1
fixed
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
kernel-64kb
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1
fixed
kernel-default
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1
fixed
kernel-default-base
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1.150700.17.35.4
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1.150700.17.35.4
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1.150700.17.35.4
fixed
kernel-obs-build
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.2
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.2
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.2
fixed
kernel-source
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1
fixed
kernel-zfcpdump
suse enterprise desktop 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise sap 15 SP7
6.4.0-150700.53.60.1
fixed
suse enterprise server 15 SP7
6.4.0-150700.53.60.1
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
bpftool6.12
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
bpftool6.12-debuginfo
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
bpftool6.18
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
bpftool6.18-debuginfo
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel-livepatch-6.12.88-119.157
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-livepatch-6.12.90-120.164
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel-livepatch-6.18.25-55.108
Amazon Linux 2023
1:1.0-0.amzn2023
fixed
kernel6.12
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-debuginfo
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-debuginfo-common-aarch64
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-debuginfo-common-x86_64
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-devel
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-headers
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-modules-extra
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-modules-extra-common
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-tools
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-tools-debuginfo
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.12-tools-devel
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
kernel6.18
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-debuginfo
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-debuginfo-common-aarch64
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-debuginfo-common-x86_64
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-devel
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-headers
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-modules-extra
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-modules-extra-common
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-tools
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-tools-debuginfo
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
kernel6.18-tools-devel
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
perf6.12
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
perf6.12-debuginfo
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
perf6.18
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
perf6.18-debuginfo
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
python3-perf6.12
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
python3-perf6.12-debuginfo
Amazon Linux 2023
1:6.12.90-120.164.amzn2023
fixed
python3-perf6.18
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
python3-perf6.18-debuginfo
Amazon Linux 2023
1:6.18.25-55.108.amzn2023
fixed
Vulnerability Media Exposure
References
https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6
https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee
https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0
https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4
https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66