Out-of-bounds Write in bfabiszewski/libmobi
Priority MEDIUM 45CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
libmobi is vulnerable to Out-of-bounds Write
Why it matters now
EPSS 0.01237 69th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| bfabiszewski | bfabiszewski/libmobi | up to 0.6 | — | No fix listed | CNA |
- bfabiszewski/libmobi Vendorbfabiszewski Affected up to 0.6 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libmobi_project:libmobi:*:*:*:*:*:*:*:* | before 0.7 | Vulnerable | bfabiszewski |
- cpe:2.3:a:libmobi_project:libmobi:*:*:*:*:*:*:*:* Versions before 0.7 Vulnerable ·bfabiszewski
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3751
- 2026-10-03 Alias added: GHSA-7g44-2g66-w5fr
References
More bfabiszewski Libmobi vulnerabilities
- TI-2021-02803 Out-of-bounds Read in bfabiszewski/libmobi CVSS 3.1CRITICAL 9.8
- TI-2018-08389 The mobi_decode_font_resource function in util.c in Libmobi 0.3 allows remote attackers… CVSS 3.0HIGH 8.8
- TI-2018-08164 The mobi_decompress_lz77 function in compression.c in Libmobi 0.3 allows remote attackers… CVSS 3.0HIGH 8.8
- TI-2018-08387 The mobi_pk1_decrypt function in encryption.c in Libmobi 0.3 allows remote attackers to… CVSS 3.0HIGH 8.8
- TI-2021-02806 Use of Out-of-range Pointer Offset in bfabiszewski/libmobi CVSS 3.1HIGH 8.1
- TI-2021-02805 Use of Out-of-range Pointer Offset in bfabiszewski/libmobi CVSS 3.1HIGH 8.1
Sources
- CVE-2021-3751 · CVE Program
- CVE-2021-3751 · NVD
- FIRST EPSS
- GHSA-7g44-2g66-w5fr · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3751 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences