linux: In the Linux kernel, the following vulnerability has been resolved: arm64/gcs: Fix error handling in arch_set_shadow...
CVE-2026-45876 is fixed in 23 products on 1 platform, first by ALAS2023-2026-1514, released March 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.
In the Linux kernel, the following vulnerability has been resolved: arm64/gcs: Fix error handling in arch_set_shadow_stack_status() alloc_gcs() returns an error-encoded pointer on failure, which comes from do_mmap(), not NULL. The current NULL check fails to detect errors, which could lead to using an invalid GCS address. Use IS_ERR_VALUE() to properly detect errors, consistent with the check in gcs_alloc_thread_stack().
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool6.18 · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| bpftool6.18-debuginfo · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel-livepatch-6.18.15-14.217 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18 · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-debuginfo · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-debuginfo-common-aarch64 · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-debuginfo-common-x86_64 · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-devel · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-headers · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-libbpf · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-libbpf-debuginfo · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-libbpf-devel · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-libbpf-static · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-modules-extra · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-modules-extra-common · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-tools · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-tools-debuginfo · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| kernel6.18-tools-devel · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| linux · Debian 14 | 6.18.14-1 | DEBIAN-CVE-2026-45876 | May 27, 2026 |
| perf6.18 · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| perf6.18-debuginfo · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| python3-perf6.18 · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
| python3-perf6.18-debuginfo · amzn 2023 | 1:6.18.15-14.217.amzn2023 | ALAS2023-2026-1514 | Mar 30, 2026 |
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