Description
In Libgcrypt 1.8.4, the C implementation of AES is vulnerable to a flush-and-reload side-channel attack because physical addresses are available to other processes. (The C implementation is used on platforms where an assembly-language implementation is unavailable.) NOTE: the vendor's position is that the issue report cannot be validated because there is no description of an attack
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.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | libgcrypt | 1.8.2-8.6.2 | SUSE-SU-2019:1971-1 |
| SLES 15 | libgcrypt | 1.8.2-6.17.1 | SUSE-SU-2019:1859-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libgcrypt | 1.9.4-1.2 | openSUSE-SU-2024:10941-1 |
| openSUSE Leap 15.0 | libgcrypt | 1.8.2-lp150.5.10.1 | openSUSE-SU-2019:1792-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.23 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.22 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.21 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.20 | libgcrypt | 1.8.4-r2 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.18 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.17 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.16 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.15 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.14 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.13 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.12 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.11 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.10 | libgcrypt | 1.8.4-r2 | — |
| Alpine v3.9 | libgcrypt | 1.8.4-r1 | — |
| Alpine v3.8 | libgcrypt | 1.8.3-r1 | — |
| Alpine v3.7 | libgcrypt | 1.8.3-r1 | — |
Advisories 6
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- SUSE-SU-2019:1859-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1971-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10941-1 libgcrypt-cavs-1.9.4-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1792-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
References
- https://dev.gnupg.org/T4541
- https://github.com/gpg/libgcrypt/commit/daedbbb5541cd8ecda1459d3b843ea4d92788762
- https://github.com/gpg/libgcrypt/commit/a4c561aab1014c3630bc88faf6f5246fee16b020
- openSUSE-SU-2019:1792 vendor-advisory
- [mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar mailing-list