CVE-2022-2279Public exploit

Application crash via invalid dictionary locale

Published Jul 1, 2022 · Updated Aug 3, 2024

NULL pointer dereference in OPF metadata handling in bfabiszewski libmobi before 0.11 allows local users to crash applications via crafted files. During OPF metadata construction, mobi_build_opf_metadata passes a NULL result from mobi_get_locale_string to strdup when dictionary locale metadata is invalid. The vulnerable path requires a crafted dictionary MOBI file to reach metadata reconstruction, and the demonstrated consequence is an application crash.

CVSS severity6.6
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in OPF metadata handling in bfabiszewski libmobi before 0.11 allows local users to crash applications via crafted files. During OPF metadata construction, mobi_build_opf_metadata passes a NULL result from mobi_get_locale_string to strdup when dictionary locale metadata is invalid. The vulnerable path requires a crafted dictionary MOBI file to reach metadata reconstruction, and the demonstrated consequence is an application crash.

The record

CVE
CVE-2022-2279
Published
Jul 1, 2022
Updated
Aug 3, 2024
Vendor
bfabiszewski
Product
libmobi
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <0.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

bfabiszewski · libmobiversion=unspecified <0.11

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
6.6huntr.devCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

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Technologies

Your stack

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Your stack

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