5.5

CVE-2026-24883: gnupg NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesDEBIAN-CVE-2026-24883
Published 27-01-2026Last modified 28-01-2026
Open JSON

Vulnerability summary

CVE-2026-24883 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in gnupg. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.3% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.50%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5 · Related 4
MGASA-2026-0197OPENSUSE-SU-2026:10112-1OPENSUSE-SU-2026:20136-1SUSE-SU-2026:20179-1SUSE-SU-2026:20195-1

Timeline

  1. 27-01-2026
    PublishedVulnerability first disclosed.
  2. 28-01-2026
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

+0.03 pp

From 0.47% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.50%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • gnupg2All versions (No fix recorded)
Gnupg1 product
  • gnupg≥ 2.5.3, < 2.5.17 | ≥ 2.5.13, < 2.5.17
Gpg4win1 product

3 vendors · 3 products

References

3 links