MEDIUM 5.9 Microsoft

CVE-2025-68972

In GnuPG through 2.4.8, if a signed message has \f at the end of a plaintext line, an adversary can construct a modified message that places additional text after the signed material, such that signature verification of the modified message succeeds (although an "invalid armor" message is printed during verification). This is related to use of \f as a marker to denote truncation of a long plaintext line.

Microsoft Security Update 2026-Aug: In GnuPG through 2.4.8, if a signed message has \f at the end of a plaintext line, an adversary can construct a modified message that places additional text after the signed material, such that signature verification of the modified message succeeds (although an "invalid armor" message is printed during verification). This is related to use of \f as a marker to denote truncation of a long plaintext line.

Affected Products

References

Published: 2026-08-06 · Source: Microsoft · Feed updated: 2026-08-10
This medium severity vulnerability with a CVSS score of 5.9 was published on 2026-08-06 via Microsoft. Affected: cbl2 gnupg2 2.4.0-3 on CBL Mariner 2.0, azl3 gnupg2 2.4.7-1 on Azure Linux 3.0, cbl2 gnupg2 2.4.0-2 on CBL Mariner 2.0 and 1 more.
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