Description
Libgcrypt before 1.6.5 does not properly perform elliptic-point curve multiplication during decryption, which makes it easier for physically proximate attackers to extract ECDH keys by measuring electromagnetic emanations.
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 | 1.6.5-2 | — |
| Debian 13 | libgcrypt20 | 1.6.5-2 | — |
| Debian 12 | libgcrypt20 | 1.6.5-2 | — |
| Debian 8 | libgcrypt20 | 1.6.3-2+deb8u1 | DSA-3474-1 |
| Debian 7 | libgcrypt11 | 1.5.0-5+deb7u4 | DSA-3478-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | libgcrypt11 | 1.5.3-2ubuntu4.3 | USN-2896-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | libgcrypt | 1.6.1-16.27.1 | SUSE-SU-2016:1089-1 |
| SLES 12 | libgcrypt | 1.6.1-16.27.1 | SUSE-SU-2016:1089-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | libgcrypt | 1.6.1-16.27.1 | SUSE-SU-2016:1089-1 |
| SLES for SAP 12 | libgcrypt | 1.6.1-16.27.1 | SUSE-SU-2016:1089-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libgcrypt | 1.7.3-1.3 | openSUSE-SU-2024:10037-1 |
Advisories 5
- USN-2896-1 libgcrypt11, libgcrypt20 vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3478-1 libgcrypt11 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3474-1 libgcrypt20 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:1089-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10037-1 libgcrypt-cavs-1.7.3-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- DSA-3478 vendor-advisory
- USN-2896-1 vendor-advisory
- GLSA-201610-04 vendor-advisory
- [gnupg-announce] 20160209 [Announce] Libgcrypt 1.6.5 with security fix released mailing-list
- DSA-3474 vendor-advisory
- 83253 vdb-entry
- FEDORA-2016-83cd045bcc vendor-advisory
- openSUSE-SU-2016:1227 vendor-advisory
- http://www.cs.tau.ac.IL/~tromer/ecdh/