Description
A timing-based side-channel flaw was found in libgcrypt's RSA implementation. This issue may allow a remote attacker to initiate a Bleichenbacher-style attack, which can lead to the decryption of RSA ciphertexts.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | libgcrypt | < 9.4.0 | 9.4.0 |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
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 | No fix yet | — |
| Debian 13 | libgcrypt20 | No fix yet | — |
| Debian 12 | libgcrypt20 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libgcrypt20 | 1.12.0-2ubuntu1.1 | USN-8711-1 |
| Ubuntu 25.10 | libgcrypt20 | No fix yet | — |
| Ubuntu 24.04 LTS | libgcrypt20 | 1.10.3-2ubuntu0.2 | USN-8711-1 |
| Ubuntu 22.04 LTS | libgcrypt20 | 1.9.4-3ubuntu3.3 | USN-8711-1 |
| Ubuntu 20.04 LTS | libgcrypt20 | No fix yet | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libgcrypt20 | No fix yet | — |
| Ubuntu Pro FIPS 20.04 LTS | libgcrypt20 | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | libgcrypt20 | No fix yet | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | libgcrypt20 | 1.12.0-2ubuntu1.1+Fips2 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | libgcrypt20 | 1.9.4-3ubuntu3.3+Fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | libgcrypt20 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | libgcrypt20 | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | libgcrypt20 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | libgcrypt20 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | libgcrypt11 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | libgcrypt +1 | 1.10.0-11.el9 | RHSA-2024:9404 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | libgcrypt +1 | 1.10.0-10.el9_4.1 | RHSA-2025:3530 |
| RHEL 9.2 EUS | libgcrypt +1 | 1.10.0-10.el9_2.1 | RHSA-2025:3534 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | libgcrypt +1 | 1.10.0-11.el9 | ALSA-2024:9404 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | libgcrypt | 1.10.0-11.el9 | RLSA-2024:9404 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libgcrypt | 1.11.0-150700.5.7.1 | SUSE-SU-2025:02719-1 |
| SLES 15 SP6 | libgcrypt | 1.10.3-150600.3.9.1 | SUSE-SU-2025:02447-1 |
| SLES 15 SP5 | libgcrypt | 1.9.4-150500.12.3.3 | SUSE-SU-2025:02773-1 |
| SLES 15 SP4 | libgcrypt | 1.9.4-150400.6.11.1 | SUSE-SU-2025:02464-2 |
| SLES 15 SP3 | libgcrypt | 1.8.2-150100.8.45.1 | SUSE-SU-2025:02752-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | libgcrypt | 1.6.1-16.86.1 | SUSE-SU-2025:02756-1 |
| SLES for SAP 16.0 | libgcrypt | 1.12.1-160000.1.1 | SUSE-FU-2026:21213-1 |
| SLES for SAP 16.0 | libgpg-error | 1.58-160000.1.1 | SUSE-FU-2026:21213-1 |
| SLES for SAP 15 SP5 | libgcrypt | 1.9.4-150500.12.3.3 | SUSE-SU-2025:02773-1 |
| SLES for SAP 15 SP4 | libgcrypt | 1.9.4-150400.6.11.1 | SUSE-SU-2025:02464-2 |
| SLES for SAP 15 SP3 | libgcrypt | 1.8.2-150100.8.45.1 | SUSE-SU-2025:02752-1 |
| SLES 16.0 | libgcrypt | 1.12.1-160000.1.1 | SUSE-FU-2026:21213-1 |
| SLES 16.0 | libgpg-error | 1.58-160000.1.1 | SUSE-FU-2026:21213-1 |
| SLE Micro 6.2 | libgcrypt | 1.12.1-160000.1.1 | SUSE-FU-2026:21232-1 |
| SLE Micro 6.2 | libgpg-error | 1.58-160000.1.1 | SUSE-FU-2026:21232-1 |
| SLE Micro 6.1 | libgcrypt | 1.10.3-slfo.1.1_2.1 | SUSE-SU-2025:20538-1 |
| SLE Micro 6.0 | libgcrypt | 1.10.3-2.1 | SUSE-SU-2025:20490-1 |
| SLE Micro 5.5 | libgcrypt | 1.9.4-150500.12.3.3 | SUSE-SU-2025:02773-1 |
| SLE Micro 5.4 | libgcrypt | 1.9.4-150400.6.11.1 | SUSE-SU-2025:02464-1 |
| SLE Micro 5.3 | libgcrypt | 1.9.4-150400.6.11.1 | SUSE-SU-2025:02464-1 |
| SLE Micro 5.2 | libgcrypt | 1.8.2-150100.8.45.1 | SUSE-SU-2025:02752-1 |
| SLE Micro 5.1 | libgcrypt | 1.8.2-150100.8.45.1 | SUSE-SU-2025:02752-1 |
| SLE HPC 15 SP5 | libgcrypt | 1.9.4-150500.12.3.3 | SUSE-SU-2025:02773-1 |
| SLE HPC 15 SP4 | libgcrypt | 1.9.4-150400.6.11.1 | SUSE-SU-2025:02464-2 |
| SLE HPC 15 SP3 | libgcrypt | 1.8.2-150100.8.45.1 | SUSE-SU-2025:02752-1 |
| SUSE Manager Server 4.3 | libgcrypt | 1.9.4-150400.6.11.1 | SUSE-SU-2025:02464-2 |
| SUSE Manager Proxy 4.3 | libgcrypt | 1.9.4-150400.6.11.1 | SUSE-SU-2025:02464-2 |
| SUSE Enterprise Storage 7.1 | libgcrypt | 1.8.2-150100.8.45.1 | SUSE-SU-2025:02752-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libgcrypt | 1.11.1-2.1 | openSUSE-SU-2025:15239-1 |
| openSUSE Leap 16.0 | libgcrypt | 1.12.1-160000.1.1 | openSUSE-FU-2026:20562-1 |
| openSUSE Leap 16.0 | libgpg-error | 1.58-160000.1.1 | openSUSE-FU-2026:20562-1 |
| openSUSE Leap 15.6 | libgcrypt | 1.10.3-150600.3.9.1 | SUSE-SU-2025:02447-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libgcrypt +1 | 1.10.2-1.amzn2023.0.2 | ALAS2023-2024-736 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libgcrypt | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | libgcrypt +1 | 1.10.0-11.el9 | ELSA-2024-9404 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | libgcrypt | 1.11.2-r1 | — |
Advisories 25
- ALSA-2024:9404 Moderate: libgcrypt security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:3534 Red Hat Security Advisory: libgcrypt security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2025:3530 Red Hat Security Advisory: libgcrypt security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2024:9404 Red Hat Security Advisory: libgcrypt security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- 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
- USN-8711-1 libgcrypt20 vulnerability Ubuntu Security Notices (USN) · Sep 2, 2026
- WID-SEC-2024-3409 Red Hat Enterprise Linux: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 1, 2026
- WID-SEC-2026-1118 Dell PowerProtect Data Domain OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 5, 2026
- SUSE-FU-2026:21232-1 Feature update for libgcrypt, libgpg-error SUSE / openSUSE Security Updates · Apr 23, 2026
- openSUSE-FU-2026:20562-1 Feature update for libgcrypt, libgpg-error SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-FU-2026:21213-1 Feature update for libgcrypt, libgpg-error SUSE / openSUSE Security Updates · Apr 22, 2026
- openSUSE-SU-2025:15239-1 libgcrypt-devel-1.11.1-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20538-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20490-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02752-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02464-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02756-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:02464-2 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:02447-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:02719-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:02773-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2024:9404 Moderate: libgcrypt security update Rocky Linux Security Advisories · Oct 9, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- ELSA-2024-9404 Moderate: libgcrypt security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 14, 2024
- ALAS2023-2024-736 Moderate: libgcrypt security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 14, 2024
References
- RHSA-2024:9404 vendor-advisory
- RHSA-2025:3530 vendor-advisory
- RHSA-2025:3534 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2024-2236 vdb-entry
- RHBZ#2245218 issue-tracking