What’s Vulnerable › Vulnerabilities

CVE-2021-3889: Use of Out-of-range Pointer Offset in bfabiszewski/libmobi

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-19 · updated 2026-06-17
• Weakness: CWE-823

Description

libmobi is vulnerable to Use of Out-of-range Pointer Offset

Affected products

• bfabiszewski/libmobi: before 0.8 — fixed in 0.8

How to fix

Upgrade to a fixed version: bfabiszewski/libmobi 0.8. Check the vendor advisory for mitigations.

References

• https://github.com/bfabiszewski/libmobi/commit/bec783e6212439a335ba6e8df7ab8ed610ca9a21
• https://huntr.dev/bounties/efb3e261-3f7d-4a45-8114-e0ace6b21516
• https://github.com/bfabiszewski/libmobi/commit/bec783e6212439a335ba6e8df7ab8ed610ca9a21
• https://huntr.dev/bounties/efb3e261-3f7d-4a45-8114-e0ace6b21516

Get alerted when CVE-2021-3889 or the next vulnerability affects your stack