module: validate string table section types
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.
CVE-2026-89556
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89556
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "c92aab819d56d51631f0484ed7af11d9d8ff4cb0",
"lessThan": "50d0aa7d25ba4bc3606f150cd69755068e79f97f",
"versionType": "git"
},
{
"status": "affected",
"version": "c92aab819d56d51631f0484ed7af11d9d8ff4cb0",
"lessThan": "e4496dda2c6d0acf7ba5fbce14a2723a8935ceee",
"versionType": "git"
},
{
"status": "affected",
"version": "c92aab819d56d51631f0484ed7af11d9d8ff4cb0",
"lessThan": "9a5ff45689329835f874cefe5174e577d141d423",
"versionType": "git"
}
],
"programFiles": [
"kernel/module/main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/module/main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89556
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #35071 · Revision 1
- Added to Heist Feed
- Publisher date