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Vulnerability record · CVE-2026-24883 · published 27 January 2026

CVE-2026-24883: Gnupg null pointer dereference vulnerability

Gnupg · Gnupg

In GnuPG before 2.5.17, a long signature packet length causes parse_signature to return success with sig->data[] set to a NULL value, leading to a denial of service (application crash).

5.5 CVSS 3.1 Medium EPSS 0.50% · top 59.5% CWE-476 · NULL pointer dereference
5.5CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

In GnuPG before 2.5.17, a long signature packet length causes parse_signature to return success with sig->data[] set to a NULL value, leading to a denial of service (application crash).

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://dev.gnupg.org/T8049 PatchProduct
https://www.openwall.com/lists/oss-security/2026/01/27/8 Mailing ListThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2006-6235Gnu privacy guard vulnerabilityA "stack overwrite" vulnerability in GnuPG (gpg) 1.x before 1.4.6, 2.x before 2.0.2, and 1.9.0 through 1.9.95 allows attackers to execute arbitrary c…EPSS 5.9%9.8CVE-2026-24881Gnupg stack-based buffer overflow vulnerabilityIn GnuPG before 2.5.17, a crafted CMS (S/MIME) EnvelopedData message carrying an oversized wrapped session key can cause a stack-based buffer overflo…EPSS 1.8%9.8CVE-2022-3515Gnupg libksba integer overflow vulnerabilityA vulnerability was found in the Libksba library due to an integer overflow within the CRL parser. The vulnerability can be exploited remotely for co…EPSS 1.6%9.3CVE-2008-1530Gnupg vulnerabilityGnuPG (gpg) 1.4.8 and 2.0.8 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted duplicate ke…EPSS 4.3%8.8CVE-2018-1000858Gnupg cross-site request forgery vulnerabilityGnuPG version 2.1.12 - 2.2.11 contains a Cross ite Request Forgery (CSRF) vulnerability in dirmngr that can result in Attacker controlled CSRF, Infor…EPSS 1.0%8.1CVE-2010-2547Gnupg use after free vulnerabilityUse-after-free vulnerability in kbx/keybox-blob.c in GPGSM in GnuPG 2.x through 2.0.16 allows remote attackers to cause a denial of service (crash) a…EPSS 5.3%7.8CVE-2026-24882Gnupg stack-based buffer overflow vulnerabilityIn GnuPG before 2.5.17, a stack-based buffer overflow exists in tpm2daemon during handling of the PKDECRYPT command for TPM-backed RSA and ECC keys.EPSS 0.44%7.8CVE-2020-25125Gnupg classic buffer overflow vulnerabilityGnuPG 2.2.21 and 2.2.22 (and Gpg4win 3.1.12) has an array overflow, leading to a crash or possibly unspecified other impact, when a victim imports an…EPSS 1.3%

Source: NIST National Vulnerability Database (record CVE-2026-24883), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.