CVE-2026-14570 Affecting libcrypt-dsa-perl package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published5 Jul 2026
- disclosed5 Jul 2026
Introduced: 5 Jul 2026
CVE-2026-14570 (opens in a new tab)How to fix?
There is no fixed version for Debian:12 libcrypt-dsa-perl.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libcrypt-dsa-perl package and not the libcrypt-dsa-perl package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.
"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values."
An attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.
Keys used to sign with an affected version should be considered compromised and new keys should be generated.
References
- https://security-tracker.debian.org/tracker/CVE-2026-14570
- https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/source/lib/Crypt/DSA/Util.pm#L56
- https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/changes
- https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/diff/TIMLEGGE/Crypt-DSA-1.21#lib/Crypt/DSA/Util.pm
- http://www.openwall.com/lists/oss-security/2026/07/05/1