{"id":"CVE-2026-89556","summary":"module: validate string table section types","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmodule: validate string table section types\n\nIn elf_validity_cache_sechdrs, section sizes and offsets are validated,\nunless the section type is SHT_NULL or SHT_NOBITS.\n\nLater, elf_validity_cache_secstrings and elf_validity_cache_index_str\naccess the section name table (.shstrtab) and symbol string table\n(.strtab) headers without first ensuring that their types are\nSHT_STRTAB. If a section type is SHT_NULL or SHT_NOBITS, sh_offset has\nnot been validated and may reference out-of-bounds memory when\ndereferenced in elf_validity_cache_secstrings or\nelf_validity_cache_strtab.\n\nValidate that both string section headers are of type SHT_STRTAB before\ncaching them.","modified":"2026-09-25T18:27:00.590837151Z","published":"2026-09-11T19:44:29.080Z","related":["openSUSE-SU-2026:11880-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89556.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/50d0aa7d25ba4bc3606f150cd69755068e79f97f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a5ff45689329835f874cefe5174e577d141d423"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4496dda2c6d0acf7ba5fbce14a2723a8935ceee"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89556.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89556"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c92aab819d56d51631f0484ed7af11d9d8ff4cb0"},{"fixed":"50d0aa7d25ba4bc3606f150cd69755068e79f97f"},{"fixed":"e4496dda2c6d0acf7ba5fbce14a2723a8935ceee"},{"fixed":"9a5ff45689329835f874cefe5174e577d141d423"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-89556.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-89556.json"}}],"schema_version":"1.9.0"}