CVE-2025-68973
CVE-2025-68973 is a high-severity vulnerability in Gnupg with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-205519
- Weakness: CWE-787
- Affected product: Gnupg
- Published:
- Last modified:
Description
In GnuPG before 2.4.9, armor_filter in g10/armor.c has two increments of an index variable where one is intended, leading to an out-of-bounds write for crafted input. (For ExtendedLTS, 2.2.51 and later are fixed versions.)
Frequently asked questions
- What is CVE-2025-68973?
- In GnuPG before 2.4.9, armor_filter in g10/armor.c has two increments of an index variable where one is intended, leading to an out-of-bounds write for crafted input. (For ExtendedLTS, 2.2.51 and later are fixed versions.)
- How severe is CVE-2025-68973?
- CVE-2025-68973 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2025-68973 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-68973?
- CVE-2025-68973 affects Gnupg. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-68973?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-68973 have an EU (EUVD) identifier?
- Yes. CVE-2025-68973 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205519.
- When was CVE-2025-68973 published?
- CVE-2025-68973 was published on 2025-12-28 and last updated on 2026-06-17.
References
- https://github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/armor.c#L1305-L1306
- https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9
- https://github.com/gpg/gnupg/compare/gnupg-2.2.50...gnupg-2.2.51
- https://gpg.fail/memcpy
- https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i
- https://news.ycombinator.com/item?id=46403200
- https://www.openwall.com/lists/oss-security/2025/12/28/5
- http://www.openwall.com/lists/oss-security/2025/12/29/11
- https://lists.debian.org/debian-lts-announce/2026/01/msg00008.html
Affected products (1)
- cpe:2.3:a:gnupg:gnupg:*:*:*:*:-:*:*:*
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