TI-2026-20068 Aliases CVE-2026-24882 GHSA-mpc3-hqr8-w5f3

Stack-based buffer overflow in GnuPG

LOW 39CWE-121Published 2026-01-27 · Updated 2026-07-15

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-121 and the CVSS impact.

Summary

In 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00438 38th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed GnuPG (GnuPG): 2.5.17Red Hat: 2 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
GnuPG	GnuPG	before 2.5.17	2.5.17	Patch available	CNA

GnuPG VendorGnuPG Affected before 2.5.17 Fixed in 2.5.17 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:gnupg:gnupg:::::-:::*	2.5.13 to before 2.5.17	Vulnerable	GnuPG
cpe:2.3:a:gpg4win:gpg4win::::::::	5.0.0 to before 5.0.1	Vulnerable	Gpg4win

cpe:2.3:a:gnupg:gnupg:*:*:*:*:-:*:*:* Versions 2.5.13 to before 2.5.17 Vulnerable ·GnuPG
cpe:2.3:a:gpg4win:gpg4win:*:*:*:*:*:*:*:* Versions 5.0.0 to before 5.0.1 Vulnerable ·Gpg4win

Remediation

Fix · CNA GnuPG (GnuPG) Fixed in 2.5.17

Red Hat 2 advisories

RHSA-2026:2753 Released 2026-02-16 · Red Hat rating Important
gnupg2 security update
- Red Hat Enterprise Linux AppStream EUS (v. 10.0) gnupg2-smime-2.4.5-2.el10_0.2
- Red Hat Enterprise Linux BaseOS EUS (v. 10.0) gnupg2-2.4.5-2.el10_0.2
RHSA-2026:2719 Released 2026-02-16 · Red Hat rating Important
gnupg2 security update
- Red Hat Enterprise Linux AppStream (v. 10) gnupg2-smime-2.4.5-4.el10_1
- Red Hat Enterprise Linux BaseOS (v. 10) gnupg2-2.4.5-4.el10_1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-01-27
GnuPG 2.5.17
3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2026-20067 Stack-based buffer overflow in GnuPGPriority MEDIUM 46
- TI-2026-20069 NULL pointer dereference in GnuPGPriority LOW 25
Show all 3 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux AppStream (v. 10)	Fixed	RHSA-2026:2719
Red Hat Enterprise Linux AppStream EUS (v. 10.0)	Fixed	RHSA-2026:2753
Red Hat Enterprise Linux BaseOS (v. 10)	Fixed	RHSA-2026:2719
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)	Fixed	RHSA-2026:2753

Not affected: 4 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-24882
2026-10-03 Alias added: GHSA-mpc3-hqr8-w5f3

References

Exploit 1

https://dev.gnupg.org/T8045

Advisory 1

https://www.openwall.com/lists/oss-security/2026/01/27/8

TI-2022-03243 Integer overflow in libksba CVSS 3.1CRITICAL 9.8
TI-2025-42429 Out-of-bounds write in GnuPG CVSS 3.1HIGH 7.8
TI-2025-42428 Improper signature verification in GnuPG CVSS 3.1MEDIUM 5.9
TI-2008-01464 GnuPG (gpg) 1.4.8 and 2.0.8 allows remote attackers to cause a denial of service (crash)… CVSS 2.0HIGH 9.3
TI-2026-20067 Stack-based buffer overflow in GnuPG CVSS 3.1CRITICAL 9.8
TI-2018-08614 mainproc.c in GnuPG before 2.2.8 mishandles the original filename during decryption and… CVSS 3.1HIGH 7.5

See all 34 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences