CVE-2026-24883: Null Pointer Dereference
Published Jan 27, 2026
·Updated
In GnuPG before 2.5.17, a long signature packet length causes parsesignature to return success with sig->data[] set to a NULL value, leading to a denial of service (application crash).
Affected Software
3 affected components
gnupg GnuPG<2.5.17
gnupg GnuPG>=2.5.13<2.5.17
Gpg4win Gpg4win>=5.0.0<5.0.1
Remediation
Patch Available
Event History
Jan 27, 2026
CVE Published
via MITRE·06:43 PM
Data Sourced
via MITRE·06:43 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·07:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jan 13, 58074
Event
via FIRST·03:03 PM
Frequently Asked Questions
1
What is the severity of CVE-2026-24883?
CVE-2026-24883 is considered a denial of service vulnerability due to the potential for application crashes.
2
How do I fix CVE-2026-24883?
To mitigate CVE-2026-24883, update GnuPG to version 2.5.17 or later.
3
What causes CVE-2026-24883?
CVE-2026-24883 is caused by a long signature packet length that results in a NULL value in sig->data[].
4
Which versions of GnuPG are affected by CVE-2026-24883?
GnuPG versions prior to 2.5.17 are affected by CVE-2026-24883.
5
Can CVE-2026-24883 be exploited remotely?
Yes, CVE-2026-24883 can be exploited remotely, leading to a denial of service through crafted signature packets.