CVE-2026-43253

linux: In the Linux kernel, the following vulnerability has been resolved: iommu/amd: move wait_on_sem() out of spinlock W...

CVE-2026-43253 is fixed in 95 products on 1 platform, first by ALAS2023-2026-1543, released April 7, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.5
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0037
31st percentile

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: move wait_on_sem() out of spinlock With iommu.strict=1, the existing completion wait path can cause soft lockups under stressed environment, as wait_on_sem() busy-waits under the spinlock with interrupts disabled. Move the completion wait in iommu_completion_wait() out of the spinlock. wait_on_sem() only polls the hardware-updated cmd_sem and does not require iommu->lock, so holding the lock during the busy wait unnecessarily increases contention and extends the time with interrupts disabled.

Where it's fixed

ProductFixed inFixReleased
Linux
bpftool6.12 · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
bpftool6.12-debuginfo · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
bpftool6.18 · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
bpftool6.18-debuginfo · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
dtb-aarch64 · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-64kb · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-64kb · sles 15.7 6.4.0-150700.53.73.2 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-64kb · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel-azure · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-azure · sles 15.7 6.4.0-150700.53.73.2 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-azure · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel-default · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-default · sles 15.7 6.4.0-150700.53.73.2 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-default · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23237-1 Aug 11, 2026
kernel-default-base · opensuse-leap 16.0 6.12.0-160000.37.1.160000.2.19 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-default-base · sles 15.7 6.4.0-150700.53.73.2.150700.17.41.4 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-default-base · sles 16.0 6.12.0-160000.37.1.160000.2.19 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel-docs · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-docs · sles 15.7 6.4.0-150700.53.73.1 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-docs · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel-kvmsmall · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-kvmsmall · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel-livepatch-6.12.77-99.140 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel-livepatch-6.18.16-18.222 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel-livepatch-SLE15-SP7-RT_Update_18 · sles 15.7 1-150700.1.5.1 SUSE-SU-2026:3130-1 Jul 20, 2026
kernel-livepatch-SLE15-SP7_Update_19 · sles 15.7 1-150700.15.3.4 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-obs-build · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-obs-build · sles 15.7 6.4.0-150700.53.73.2 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-obs-qa · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-obs-qa · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel-rt · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-source · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-source · sles 15.7 6.4.0-150700.53.73.1 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-source · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel-syms · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-syms · sles 15.7 6.4.0-150700.53.73.1 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-syms · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel-uek · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-devel · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-devel · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-deprecated · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-deprecated · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-desktop · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-desktop · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-extra · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-extra · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-extra-netfilter · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-extra-netfilter · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-usb · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-usb · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-wireless · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-wireless · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-devel · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-devel · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-doc · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-doc · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-deprecated · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-deprecated · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-desktop · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-desktop · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-extra · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-extra · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-extra-netfilter · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-extra-netfilter · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-usb · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-usb · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-wireless · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-wireless · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-tools · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-tools · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-devel · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-devel · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-deprecated · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-deprecated · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-desktop · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-desktop · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-extra · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-extra · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-extra-netfilter · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-extra-netfilter · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-usb · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-usb · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-wireless · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-wireless · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-zfcpdump · opensuse-leap 16.0 6.12.0-160000.37.1 OPENSUSE-SU-2026:21555-1 Aug 12, 2026
kernel-zfcpdump · sles 15.7 6.4.0-150700.53.73.2 SUSE-SU-2026:3166-1 Jul 21, 2026
kernel-zfcpdump · sles 16.0 6.12.0-160000.37.1 SUSE-SU-2026:23231-1 Aug 11, 2026
kernel6.12 · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-debuginfo · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-debuginfo-common-aarch64 · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-debuginfo-common-x86_64 · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-devel · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-headers · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-libbpf · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-libbpf-debuginfo · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-libbpf-devel · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-libbpf-static · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-modules-extra · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-modules-extra-common · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-tools · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-tools-debuginfo · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.12-tools-devel · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
kernel6.18 · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-debuginfo · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-devel · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-headers · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-libbpf · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-libbpf-debuginfo · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-libbpf-devel · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-libbpf-static · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-modules-extra · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-modules-extra-common · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-tools · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-tools-debuginfo · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
kernel6.18-tools-devel · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
linux · Debian 13.5 (trixie) 6.12.85-1 DEBIAN-CVE-2026-43253 May 15, 2026
linux · Debian 14 6.19.6-1 DEBIAN-CVE-2026-43253 May 15, 2026
perf6.12 · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
perf6.12-debuginfo · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
perf6.18 · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
perf6.18-debuginfo · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
python3-perf6.12 · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
python3-perf6.12-debuginfo · amzn 2023 1:6.12.77-99.140.amzn2023 ALAS2023-2026-1543 Apr 7, 2026
python3-perf6.18 · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026
python3-perf6.18-debuginfo · amzn 2023 1:6.18.16-18.222.amzn2023 ALAS2023-2026-1702 May 11, 2026

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