CVE-2026-43109
x86: shadow stacks: proper error handling for mmap lock
CVE-2026-43109 is fixed in 96 products on 1 platform, first by ALAS2023-2026-1693, released May 8, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.1
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0011
1st percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool6.12 · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| bpftool6.12-debuginfo · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| bpftool6.18 · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| bpftool6.18-debuginfo · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.66.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-azure · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-azure · sles 15.7 | 6.4.0-150700.53.66.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-azure · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-default · sles 15.6 | 6.4.0-150600.23.125.1 | SUSE-SU-2026:3156-1 | Jul 21, 2026 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.66.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-default · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.35.1.160000.2.16 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-default-base · sles 15.6 | 6.4.0-150600.23.125.1.150600.12.58.3 | SUSE-SU-2026:3156-1 | Jul 21, 2026 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.66.1.150700.17.39.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.35.1.160000.2.16 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-docs · sles 15.6 | 6.4.0-150600.23.125.1 | SUSE-SU-2026:3156-1 | Jul 21, 2026 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.66.2 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-docs · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-livepatch-6.12.88-119.157 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1753 | May 25, 2026 |
| kernel-livepatch-6.12.90-120.164 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel-livepatch-6.18.25-55.108 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel-livepatch-SLE15-SP6_Update_14 · sles 15.6 | 16-150600.2.1 | SUSE-SU-2026:3726-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP6_Update_15 · sles 15.6 | 16-150600.2.1 | SUSE-SU-2026:3754-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP6_Update_16 · sles 15.6 | 13-150600.2.1 | SUSE-SU-2026:3704-1 | Aug 23, 2026 |
| kernel-livepatch-SLE15-SP6_Update_18 · sles 15.6 | 11-150600.2.1 | SUSE-SU-2026:3748-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP6_Update_20 · sles 15.6 | 10-150600.2.1 | SUSE-SU-2026:3719-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP6_Update_24 · sles 15.6 | 6-150600.2.1 | SUSE-SU-2026:3761-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP6_Update_25 · sles 15.6 | 5-150600.2.1 | SUSE-SU-2026:3760-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP6_Update_26 · sles 15.6 | 5-150600.2.1 | SUSE-SU-2026:3775-1 | Aug 25, 2026 |
| kernel-livepatch-SLE15-SP6_Update_27 · sles 15.6 | 4-150600.2.1 | SUSE-SU-2026:3776-1 | Aug 25, 2026 |
| kernel-livepatch-SLE15-SP6_Update_28 · sles 15.6 | 4-150600.2.1 | SUSE-SU-2026:3777-1 | Aug 25, 2026 |
| kernel-livepatch-SLE15-SP6_Update_29 · sles 15.6 | 1-150600.13.7.1 | SUSE-SU-2026:3156-1 | Jul 21, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_10 · sles 15.7 | 8-150700.2.1 | SUSE-SU-2026:3696-1 | Aug 22, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_12 · sles 15.7 | 7-150700.2.1 | SUSE-SU-2026:3746-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_13 · sles 15.7 | 6-150700.2.1 | SUSE-SU-2026:3698-1 | Aug 22, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_14 · sles 15.7 | 5-150700.2.1 | SUSE-SU-2026:3694-1 | Aug 22, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_15 · sles 15.7 | 4-150700.2.1 | SUSE-SU-2026:3699-1 | Aug 22, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_16 · sles 15.7 | 1-150700.1.5.2 | SUSE-SU-2026:2591-1 | Jun 23, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_3 · sles 15.7 | 16-150700.2.1 | SUSE-SU-2026:3689-1 | Aug 22, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_7 · sles 15.7 | 11-150700.2.1 | SUSE-SU-2026:3697-1 | Aug 22, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_8 · sles 15.7 | 11-150700.2.1 | SUSE-SU-2026:3748-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP7_Update_10 · sles 15.7 | 8-150700.2.1 | SUSE-SU-2026:3771-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP7_Update_11 · sles 15.7 | 8-150700.2.1 | SUSE-SU-2026:3770-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP7_Update_14 · sles 15.7 | 5-150700.2.1 | SUSE-SU-2026:3774-1 | Aug 25, 2026 |
| kernel-livepatch-SLE15-SP7_Update_15 · sles 15.7 | 4-150700.2.1 | SUSE-SU-2026:3779-1 | Aug 25, 2026 |
| kernel-livepatch-SLE15-SP7_Update_16 · sles 15.7 | 1-150700.15.3.2 | SUSE-SU-2026:2482-1 | Jun 22, 2026 |
| kernel-livepatch-SLE15-SP7_Update_18 · sles 15.7 | 1-150700.15.3.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-livepatch-SLE15-SP7_Update_3 · sles 15.7 | 16-150700.2.1 | SUSE-SU-2026:3726-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP7_Update_4 · sles 15.7 | 16-150700.2.1 | SUSE-SU-2026:3754-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP7_Update_6 · sles 15.7 | 11-150700.2.1 | SUSE-SU-2026:3704-1 | Aug 23, 2026 |
| kernel-livepatch-SLE15-SP7_Update_7 · sles 15.7 | 11-150700.2.1 | SUSE-SU-2026:3768-1 | Aug 24, 2026 |
| kernel-livepatch-SLE15-SP7_Update_8 · sles 15.7 | 11-150700.2.1 | SUSE-SU-2026:3761-1 | Aug 24, 2026 |
| kernel-livepatch-SLE16_Update_0 · sles 16.0 | 17-160000.4.3 | SUSE-SU-2026:23341-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_1 · sles 16.0 | 15-160000.1.1 | SUSE-SU-2026:23343-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_10 · sles 16.0 | 6-160000.1.1 | SUSE-SU-2026:23332-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_11 · sles 16.0 | 6-160000.1.1 | SUSE-SU-2026:23331-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_12 · sles 16.0 | 4-160000.1.1 | SUSE-SU-2026:23330-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_13 · sles 16.0 | 4-160000.1.2 | SUSE-SU-2026:23329-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_2 · sles 16.0 | 13-160000.1.1 | SUSE-SU-2026:23340-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_3 · sles 16.0 | 12-160000.1.1 | SUSE-SU-2026:23339-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_4 · sles 16.0 | 11-160000.1.1 | SUSE-SU-2026:23338-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_5 · sles 16.0 | 10-160000.1.1 | SUSE-SU-2026:23337-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_6 · sles 16.0 | 9-160000.1.1 | SUSE-SU-2026:23336-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_7 · sles 16.0 | 8-160000.1.1 | SUSE-SU-2026:23335-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_8 · sles 16.0 | 7-160000.1.1 | SUSE-SU-2026:23334-1 | Aug 26, 2026 |
| kernel-livepatch-SLE16_Update_9 · sles 16.0 | 6-160000.1.1 | SUSE-SU-2026:23333-1 | Aug 26, 2026 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-obs-build · sles 15.6 | 6.4.0-150600.23.125.1 | SUSE-SU-2026:3156-1 | Jul 21, 2026 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.66.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-source · sles 15.6 | 6.4.0-150600.23.125.1 | SUSE-SU-2026:3156-1 | Jul 21, 2026 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.66.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-source · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-syms · sles 15.6 | 6.4.0-150600.23.125.1 | SUSE-SU-2026:3156-1 | Jul 21, 2026 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.66.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-syms · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.35.1 | OPENSUSE-SU-2026:20965-1 | Jun 15, 2026 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.66.1 | SUSE-SU-2026:2800-1 | Jul 8, 2026 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.35.1 | SUSE-SU-2026:22127-1 | Jun 15, 2026 |
| kernel6.12 · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-debuginfo · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-debuginfo-common-aarch64 · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-debuginfo-common-x86_64 · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-devel · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-headers · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-modules-extra · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-modules-extra-common · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-tools · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-tools-debuginfo · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.12-tools-devel · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| kernel6.18 · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-debuginfo · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-debuginfo-common-aarch64 · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-debuginfo-common-x86_64 · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-devel · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-headers · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-modules-extra · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-modules-extra-common · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-tools · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-tools-debuginfo · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| kernel6.18-tools-devel · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.88-1 | DEBIAN-CVE-2026-43109 | May 15, 2026 |
| linux · Debian 14 | 6.19.14-1 | DEBIAN-CVE-2026-43109 | May 15, 2026 |
| perf6.12 · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| perf6.12-debuginfo · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| perf6.18 · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| perf6.18-debuginfo · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| python3-perf6.12 · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| python3-perf6.12-debuginfo · amzn 2023 | 1:6.12.90-120.164.amzn2023 | ALAS2023-2026-1816 | Jun 8, 2026 |
| python3-perf6.18 · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
| python3-perf6.18-debuginfo · amzn 2023 | 1:6.18.25-55.108.amzn2023 | ALAS2023-2026-1693 | May 8, 2026 |
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