Improper input validation in removing style tag in libsubextractor.so prior to SMR Sep-2026 Release 1 allows local attackers to write out-of-bounds… (CVE-2026-21089)
CVE-2026-21089 is a vulnerability in libsubextractor.so prior to SMR Sep-2026 Release 1 where improper input validation during the removal of style tags allows local attackers to write out-of-bounds memory. This flaw could lead to memory corruption. The vulnerability has a medium severity rating. No known exploits are reported in the wild. No patch or remediation details are currently provided.
AI Analysis
Technical Summary
This vulnerability involves improper input validation in the process of removing style tags within the libsubextractor.so component before SMR Sep-2026 Release 1. The flaw permits local attackers to perform out-of-bounds memory writes, potentially causing memory corruption or instability. The CVSS 4.0 vector indicates local attack vector with low complexity and no privileges required, but user interaction is needed. The overall impact is moderate, with no known active exploitation or vendor patch information available at this time.
Potential Impact
Local attackers can exploit this vulnerability to write out-of-bounds memory, which may lead to memory corruption and potentially affect the stability or security of the affected system. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch links are provided, users should monitor vendor communications for updates and avoid untrusted local code execution until a fix is available.
Improper input validation in removing style tag in libsubextractor.so prior to SMR Sep-2026 Release 1 allows local attackers to write out-of-bounds… (CVE-2026-21089)
Description
CVE-2026-21089 is a vulnerability in libsubextractor.so prior to SMR Sep-2026 Release 1 where improper input validation during the removal of style tags allows local attackers to write out-of-bounds memory. This flaw could lead to memory corruption. The vulnerability has a medium severity rating. No known exploits are reported in the wild. No patch or remediation details are currently provided.
CVSS v4.0
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper input validation in the process of removing style tags within the libsubextractor.so component before SMR Sep-2026 Release 1. The flaw permits local attackers to perform out-of-bounds memory writes, potentially causing memory corruption or instability. The CVSS 4.0 vector indicates local attack vector with low complexity and no privileges required, but user interaction is needed. The overall impact is moderate, with no known active exploitation or vendor patch information available at this time.
Potential Impact
Local attackers can exploit this vulnerability to write out-of-bounds memory, which may lead to memory corruption and potentially affect the stability or security of the affected system. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch links are provided, users should monitor vendor communications for updates and avoid untrusted local code execution until a fix is available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-fv7f-g3wg-p3v5
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-21089"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6aa15f7cacd9273b49618396
Added to database: 09/09/2026, 13:30:36 UTC
Last enriched: 09/09/2026, 13:58:08 UTC
Last updated: 09/09/2026, 19:52:22 UTC
Views: 3
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