Description
Libgcrypt before 1.8.1 does not properly consider Curve25519 side-channel attacks, which makes it easier for attackers to discover a secret key, related to cipher/ecc.c and mpi/ec.c.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | libgcrypt | libgcrypt | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libgcrypt20 | 1.7.9-1 | — |
| Debian 13 | libgcrypt20 | 1.7.9-1 | — |
| Debian 12 | libgcrypt20 | 1.7.9-1 | — |
| Debian 9 | libgcrypt20 | 1.7.6-2+deb9u2 | DSA-3959-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libgcrypt | 1.9.4-1.2 | openSUSE-SU-2024:10941-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.6 | libgcrypt | 1.7.9-r0 | — |
| Alpine v3.5 | libgcrypt | 1.7.9-r0 | — |
| Alpine v3.4 | libgcrypt | 1.7.9-r0 | — |
Advisories 2
- DSA-3959-1 libgcrypt20 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10941-1 libgcrypt-cavs-1.9.4-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 100503 vdb-entry
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- 1041294 vdb-entry
- DSA-3959 vendor-advisory
- https://lists.debian.org/debian-security-announce/2017/msg00221.html
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=da780c8183cccc8f533c8ace8211ac2cb2bdee7b
- https://eprint.iacr.org/2017/806
- https://security-tracker.debian.org/tracker/CVE-2017-0379
- https://security.netapp.com/advisory/ntap-20180726-0002/
- https://bugs.debian.org/873383