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.)

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.4 / Impact : 5.8

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/armor.c#L1305-L1306	Product
https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9	Patch
https://github.com/gpg/gnupg/compare/gnupg-2.2.50...gnupg-2.2.51	Patch
https://gpg.fail/memcpy	Broken Link
https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i	Issue Tracking
https://news.ycombinator.com/item?id=46403200	Issue Tracking
https://www.openwall.com/lists/oss-security/2025/12/28/5	Mailing List
http://www.openwall.com/lists/oss-security/2025/12/29/11	Mailing List Patch
https://lists.debian.org/debian-lts-announce/2026/01/msg00008.html
https://gpg.fail/memcpy	Broken Link

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnupg:gnupg:*:*:*:*:-:*:*:*

History

13 Oct 2026, 09:10

Type	Values Removed	Values Added
Summary		(es) En GnuPG anterior a 2.4.9, armor_filter en g10/armor.c tiene dos incrementos de una variable de índice donde solo uno está previsto, lo que lleva a una escritura fuera de límites para una entrada manipulada. (Para ExtendedLTS, 2.2.51 y posteriores son versiones corregidas.)

Information

Published : 2025-12-28 17:16

Updated : 2026-10-13 09:10

NVD link : CVE-2025-68973

Mitre link : CVE-2025-68973

CVE.ORG link : CVE-2025-68973

JSON object : View

Products Affected

gnupg

gnupg

CWE

CWE-675

Multiple Operations on Resource in Single-Operation Context

CWE-787

Out-of-bounds Write

{"id": "CVE-2025-68973", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-68973", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-29T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 1.4}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.0, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.0}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "GnuPG", "product": "GnuPG", "versions": [{"status": "affected", "version": "0", "lessThan": "2.2.51", "versionType": "semver"}, {"status": "affected", "version": "2.3.0", "lessThan": "2.4.9", "versionType": "semver"}], "defaultStatus": "unknown"}]}], "published": "2025-12-28T17:16:01.500", "references": [{"url": "https://github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/armor.c#L1305-L1306", "tags": ["Product"], "source": "cve@mitre.org"}, {"url": "https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9", "tags": ["Patch"], "source": "cve@mitre.org"}, {"url": "https://github.com/gpg/gnupg/compare/gnupg-2.2.50...gnupg-2.2.51", "tags": ["Patch"], "source": "cve@mitre.org"}, {"url": "https://gpg.fail/memcpy", "tags": ["Broken Link"], "source": "cve@mitre.org"}, {"url": "https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i", "tags": ["Issue Tracking"], "source": "cve@mitre.org"}, {"url": "https://news.ycombinator.com/item?id=46403200", "tags": ["Issue Tracking"], "source": "cve@mitre.org"}, {"url": "https://www.openwall.com/lists/oss-security/2025/12/28/5", "tags": ["Mailing List"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2025/12/29/11", "tags": ["Mailing List", "Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2026/01/msg00008.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://gpg.fail/memcpy", "tags": ["Broken Link"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-675"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "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.)"}, {"lang": "es", "value": "En GnuPG anterior a 2.4.9, armor_filter en g10/armor.c tiene dos incrementos de una variable de \u00edndice donde solo uno est\u00e1 previsto, lo que lleva a una escritura fuera de l\u00edmites para una entrada manipulada. (Para ExtendedLTS, 2.2.51 y posteriores son versiones corregidas.)"}], "lastModified": "2026-10-13T09:10:00.323", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gnupg:gnupg:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "8D4239B3-0B8A-4E14-9E33-DD52A3F8FF25", "versionEndIncluding": "2.4.8"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}