RHSA-2026:7458

Vulnerability from csaf_redhat - Published: 2026-04-10 19:50 - Updated: 2026-04-20 21:33
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: gnupg2: * gnupg2-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-dirmngr-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-g13-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-gpg-agent-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-gpgconf-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-keyboxd-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-scdaemon-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-smime-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-utils-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-verify-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-wks-2.4.9-5.1.hum1 (aarch64, x86_64) * gnupg2-2.4.9-5.1.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2025-68972

A flaw was found in GnuPG. An adversary can exploit this vulnerability by crafting a signed message that includes a form feed character (\f) at the end of a plaintext line. This allows the adversary to append additional, unsigned text to the message while the signature verification still reports success. This issue leads to an integrity bypass, potentially enabling the spoofing of signed communications.

5.9 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
CWE-347 - Improper Verification of Cryptographic Signature
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:7458
Workaround Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
References
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        "name": "Improper Verification of Cryptographic Signature"
      },
      "discovery_date": "2025-12-27T23:00:44.603303+00:00",
      "ids": [
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          "text": "2425646"
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        {
          "category": "description",
          "text": "A flaw was found in GnuPG. An adversary can exploit this vulnerability by crafting a signed message that includes a form feed character (\\f) at the end of a plaintext line. This allows the adversary to append additional, unsigned text to the message while the signature verification still reports success. This issue leads to an integrity bypass, potentially enabling the spoofing of signed communications.",
          "title": "Vulnerability description"
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          "text": "gnupg: GnuPG: Signature bypass via form feed character in signed messages",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated Moderate for Red Hat products as it affects GnuPG, allowing an attacker to append unsigned text to a signed message while signature verification still reports success. This integrity bypass could lead to spoofing of signed communications, impacting the authenticity of signed data in Red Hat Enterprise Linux environments.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2425646"
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        {
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68972"
        },
        {
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          "summary": "https://gpg.fail/formfeed",
          "url": "https://gpg.fail/formfeed"
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        {
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          "summary": "https://news.ycombinator.com/item?id=46404339",
          "url": "https://news.ycombinator.com/item?id=46404339"
        }
      ],
      "release_date": "2025-12-27T22:52:30.957000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-04-10T19:50:47+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
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            "Red Hat Hardened Images:gnupg2-main@src",
            "Red Hat Hardened Images:gnupg2-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
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            "Red Hat Hardened Images:gnupg2-main@src",
            "Red Hat Hardened Images:gnupg2-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:gnupg2-main@aarch64",
            "Red Hat Hardened Images:gnupg2-main@src",
            "Red Hat Hardened Images:gnupg2-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "gnupg: GnuPG: Signature bypass via form feed character in signed messages"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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