linux: In the Linux kernel, the following vulnerability has been resolved: module: validate string table section types In...
CVE-2026-89556 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-89556, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.
In the Linux kernel, the following vulnerability has been resolved: module: validate string table section types In elf_validity_cache_sechdrs, section sizes and offsets are validated, unless the section type is SHT_NULL or SHT_NOBITS. Later, elf_validity_cache_secstrings and elf_validity_cache_index_str access the section name table (.shstrtab) and symbol string table (.strtab) headers without first ensuring that their types are SHT_STRTAB. If a section type is SHT_NULL or SHT_NOBITS, sh_offset has not been validated and may reference out-of-bounds memory when dereferenced in elf_validity_cache_secstrings or elf_validity_cache_strtab. Validate that both string section headers are of type SHT_STRTAB before caching them.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool6.18 · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| bpftool6.18-debuginfo · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel-livepatch-6.18.51-120.162 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18 · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-debuginfo · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-debuginfo-common-aarch64 · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-debuginfo-common-x86_64 · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-devel · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-headers · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-modules-extra · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-modules-extra-common · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-tools · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-tools-debuginfo · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| kernel6.18-tools-devel · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| linux · Debian 14 | 7.2.6-1 | DEBIAN-CVE-2026-89556 | Sep 23, 2026 |
| microvm-kernel6.18 · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| perf6.18 · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| perf6.18-debuginfo · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| python3-perf6.18 · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
| python3-perf6.18-debuginfo · amzn 2023 | 1:6.18.51-120.162.amzn2023 | ALAS2023-2026-3187 | Nov 7, 2026 |
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