Improper input validation in loading a subtitle frame in libsubextractor.so prior to SMR Sep-2026 Release 1 allows local attackers to write… (CVE-2026-21088)
CVE-2026-21088 is a vulnerability in libsubextractor.so prior to SMR Sep-2026 Release 1 where improper input validation when loading a subtitle frame allows local attackers to write out-of-bounds memory. This flaw could lead to memory corruption. No known exploits are reported in the wild. The severity is assessed as medium based on available data.
AI Analysis
Technical Summary
This vulnerability involves improper input validation in the subtitle frame loading functionality of libsubextractor.so before SMR Sep-2026 Release 1. Local attackers can exploit this flaw to write outside the intended memory bounds, potentially causing memory corruption. The vulnerability does not have a CVSS score but is rated as moderate in the GCVE database. There is no information about a patch or fix availability in the provided data.
Potential Impact
Successful exploitation allows local attackers to write out-of-bounds memory, which may lead to memory corruption and potentially affect the stability or security of the affected system. No further impact details or exploitation in the wild are reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided in the available data.
Improper input validation in loading a subtitle frame in libsubextractor.so prior to SMR Sep-2026 Release 1 allows local attackers to write… (CVE-2026-21088)
Description
CVE-2026-21088 is a vulnerability in libsubextractor.so prior to SMR Sep-2026 Release 1 where improper input validation when loading a subtitle frame allows local attackers to write out-of-bounds memory. This flaw could lead to memory corruption. No known exploits are reported in the wild. The severity is assessed as medium based on available data.
CVSS v4.0
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper input validation in the subtitle frame loading functionality of libsubextractor.so before SMR Sep-2026 Release 1. Local attackers can exploit this flaw to write outside the intended memory bounds, potentially causing memory corruption. The vulnerability does not have a CVSS score but is rated as moderate in the GCVE database. There is no information about a patch or fix availability in the provided data.
Potential Impact
Successful exploitation allows local attackers to write out-of-bounds memory, which may lead to memory corruption and potentially affect the stability or security of the affected system. No further impact details or exploitation in the wild are reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-rvhf-9rr9-xw9h
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-21088"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6aa15f7bacd9273b49618376
Added to database: 09/09/2026, 13:30:35 UTC
Last enriched: 09/09/2026, 13:57:29 UTC
Last updated: 09/09/2026, 20:12:19 UTC
Views: 2
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