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6.1 Medium

CVE-2017-7526 libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of…

Description

libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.

Affected products and versions

Product Affected versions Fixed in
libgcrypt 1.7.8 No fix stated

Other CVEs of libgcrypt

The 3 CVEs of libgcrypt →
CVE-2026-41990 Libgcrypt before 1.12.2 mishandles Dilithium signing 4.0 Medium CVE-2026-41989 Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH… 6.7 Medium
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