Description
Issue summary: Applications using RSASVE key encapsulation to establish
a secret encryption key can send contents of an uninitialized memory buffer to
a malicious peer.
Impact summary: The uninitialized buffer might contain sensitive data from the
previous execution of the application process which leads to sensitive data
leakage to an attacker.
RSA_public_encrypt() returns the number of bytes written on success and -1
on error. The affected code tests only whether the return value is non-zero.
As a result, if RSA encryption fails, encapsulation can still return success to
the caller, set the output lengths, and leave the caller to use the contents of
the ciphertext buffer as if a valid KEM ciphertext had been produced.
If applications use EVP_PKEY_encapsulate() with RSA/RSASVE on an
attacker-supplied invalid RSA public key without first validating that key,
then this may cause stale or uninitialized contents of the caller-provided
ciphertext buffer to be disclosed to the attacker in place of the KEM
ciphertext.
As a workaround calling EVP_PKEY_public_check() or
EVP_PKEY_public_check_quick() before EVP_PKEY_encapsulate() will mitigate
the issue.
The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.1 and 3.0 are affected by this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | 3.6.0 – < 3.6.2, 3.5.0 – < 3.5.6, 3.4.0 – < 3.4.5, 3.3.0 – < 3.3.7, 3.0.0 – < 3.0.20 | 3.6.2 |
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 | openssl | 3.6.2-1 | — |
| Debian 13 | openssl | 3.5.5-1~deb13u2 | — |
| Debian 12 | openssl | 3.0.19-1~deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | edk2 +1 | No fix yet | — |
| Ubuntu 26.10 | openssl | 3.5.5-1ubuntu3 | — |
| Ubuntu 26.04 LTS | edk2 +1 | No fix yet | — |
| Ubuntu 26.04 LTS | openssl | 3.5.5-1ubuntu3 | — |
| Ubuntu 25.10 | edk2 | No fix yet | — |
| Ubuntu 25.10 | openssl | 3.5.3-1ubuntu3.3 | — |
| Ubuntu 24.04 LTS | edk2 | No fix yet | — |
| Ubuntu 24.04 LTS | openssl | 3.0.13-0ubuntu3.9 | — |
| Ubuntu 22.04 LTS | openssl | 3.0.2-0ubuntu1.23 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 24.04 LTS | openssl-fips | 3.0.13-0ubuntu3.12+Fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | openssl +1 | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | openssl +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | edk2 +4 | 20251114-5.el10_2.2 | RHSA-2026:39297 |
| RHEL 10 | openssl +3 | 1:3.5.5-2.el10_2 | RHSA-2026:19066 |
| RHEL 10 | openssl-fips-provider +1 | 3.0.7-11.el10_2 | RHSA-2026:27746 |
| RHEL 9 | openssl +3 | 1:3.5.5-2.el9_8 | RHSA-2026:19218 |
| RHEL 9 | openssl-fips-provider +1 | 3.0.7-11.el9_8 | RHSA-2026:27744 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | openssl +3 | 1:3.2.2-16.el10_0.7 | RHSA-2026:71542 |
| RHEL 10.0 EUS | openssl-fips-provider +1 | 3.0.7-11.el10_0 | RHSA-2026:27745 |
| RHEL 9.6 EUS | openssl +3 | 1:3.2.2-7.el9_6.4 | RHSA-2026:83617 |
| RHEL 9.6 EUS | openssl-fips-provider +1 | 3.0.7-11.el9_0 | RHSA-2026:28832 |
| RHEL 9.4 E4S | openssl +1 | 1:3.0.7-29.el9_4.3 | RHSA-2026:84573 |
| RHEL 9.4 E4S | openssl-fips-provider +1 | 3.0.7-11.el9_0 | RHSA-2026:28832 |
| RHEL 9.2 E4S | openssl +1 | 1:3.0.7-18.el9_2.4 | RHSA-2026:84572 |
| RHEL 9.2 E4S | openssl-fips-provider +1 | 3.0.7-11.el9_0 | RHSA-2026:28832 |
| Red Hat Hardened Images 1 | openssl +5 | 3.5.6-0.1.hum1 | RHSA-2026:7261 |
| Red Hat Hardened Images 1 | openssl-fips-provider +1 | 3.0.7-1.2.hum1 | RHSA-2026:28211 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | edk2-ovmf +3 | 20251114-5.el10_2.2 | ALSA-2026:39297 |
| AlmaLinux 10 | openssl +3 | 1:3.5.5-2.el10_2.alma.1 | ALSA-2026:19066 |
| AlmaLinux 9 | openssl +3 | 1:3.5.5-2.el9_8 | ALSA-2026:19218 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | edk2 | 20251114-5.el10_2.2 | RLSA-2026:39297 |
| Rocky Linux 10 | openssl | 1:3.5.5-2.el10_2 | RLSA-2026:19066 |
| Rocky Linux 9 | openssl | 1:3.5.5-2.el9_8 | RLSA-2026:19218 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| SLES 15 SP7 | openssl-3 | 3.2.3-150700.5.31.1 | SUSE-SU-2026:1375-1 |
| SLES 15 SP6 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| SLES 15 SP6 | openssl-3 | 3.1.4-150600.5.45.1 | SUSE-SU-2026:1215-1 |
| SLES 15 SP5 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| SLES 15 SP5 | openssl-3 | 3.0.8-150500.5.60.1 | SUSE-SU-2026:1213-1 |
| SLES 15 SP4 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| SLES 15 SP4 | openssl-1_1 | 1.1.1l-150400.7.90.1 | SUSE-SU-2026:1257-1 |
| SLES 15 SP4 | openssl-3 | 3.0.8-150400.4.81.1 | SUSE-SU-2026:1214-1 |
| SLES 12 SP5 | openssl-1_0_0 | 1.0.2p-3.106.1 | SUSE-SU-2026:1256-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | openssl-3 | 3.5.0-160000.7.1 | SUSE-SU-2026:21186-1 |
| SLES for SAP 15 SP6 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| SLES for SAP 15 SP6 | openssl-3 | 3.1.4-150600.5.45.1 | SUSE-SU-2026:1215-1 |
| SLES for SAP 15 SP5 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| SLES for SAP 15 SP5 | openssl-3 | 3.0.8-150500.5.60.1 | SUSE-SU-2026:1213-1 |
| SLES for SAP 15 SP4 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| SLES for SAP 15 SP4 | openssl-1_1 | 1.1.1l-150400.7.90.1 | SUSE-SU-2026:1257-1 |
| SLES for SAP 15 SP4 | openssl-3 | 3.0.8-150400.4.81.1 | SUSE-SU-2026:1214-1 |
| SLES 16.0 | openssl-3 | 3.5.0-160000.7.1 | SUSE-SU-2026:21186-1 |
| SLE Micro 6.2 | openssl-3 | 3.5.0-160000.7.1 | SUSE-SU-2026:21107-1 |
| SLE Micro 6.1 | openssl-3 | 3.1.4-slfo.1.1_9.1 | SUSE-SU-2026:21037-1 |
| SLE Micro 6.0 | openssl-3 | 3.1.4-12.1 | SUSE-SU-2026:21065-1 |
| SLE Micro 5.4 | openssl-1_1 | 1.1.1l-150400.7.90.1 | SUSE-SU-2026:1257-1 |
| SLE Micro 5.4 | openssl-3 | 3.0.8-150400.4.81.1 | SUSE-SU-2026:1214-1 |
| SLE Micro 5.3 | openssl-1_1 | 1.1.1l-150400.7.90.1 | SUSE-SU-2026:1257-1 |
| SLE Micro 5.3 | openssl-3 | 3.0.8-150400.4.81.1 | SUSE-SU-2026:1214-1 |
| SLE Micro 5.2 | openssl-1_1 | 1.1.1d-150200.11.109.1 | SUSE-SU-2026:1216-1 |
| SLE HPC 15 SP5 | openssl-3 | 3.0.8-150500.5.60.1 | SUSE-SU-2026:1213-1 |
| SLE HPC 15 SP4 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| SLE HPC 15 SP4 | openssl-1_1 | 1.1.1l-150400.7.90.1 | SUSE-SU-2026:1257-1 |
| SLE HPC 15 SP4 | openssl-3 | 3.0.8-150400.4.81.1 | SUSE-SU-2026:1214-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-3 | 3.5.3-4.1 | openSUSE-SU-2026:10533-1 |
| openSUSE Leap 16.0 | openssl-3 | 3.5.0-160000.7.1 | openSUSE-SU-2026:20525-1 |
| openSUSE Leap 15.6 | openssl-1_0_0 | 1.0.2p-150000.3.105.1 | SUSE-SU-2026:1291-1 |
| openSUSE Leap 15.6 | openssl-3 | 3.1.4-150600.5.45.1 | SUSE-SU-2026:1215-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openssl | 3.5.6-r0 | — |
| Alpine v3.23 | openssl | 3.5.6-r0 | — |
| Alpine v3.22 | openssl | 3.5.6-r0 | — |
| Alpine v3.21 | openssl | 3.3.7-r0 | — |
| Alpine v3.20 | openssl | 3.3.7-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | openssl +5 | 1:3.5.5-1.amzn2023.0.4 | ALAS2023-2026-1586 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | openssl | 3.3.5-5 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | edk2-ovmf +3 | 20251114-5.0.1.el10_2.2 | ELSA-2026-39297 |
| Oracle Linux 10 | openssl +3 | 1:3.5.5-2.0.1.el10_2 | ELSA-2026-19066 |
| Oracle Linux 10 | openssl-fips-provider +1 | 3.0.7-11.0.1.el10_2 | ELSA-2026-27746 |
| Oracle Linux 9 | openssl +3 | 1:3.5.5-2.0.1.el9_8 | ELSA-2026-19218 |
| Oracle Linux 9 | openssl-fips-provider +1 | 3.0.7-11.0.1.el9_8 | ELSA-2026-27744 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | openssl +1 | 3.6.2-r0 | — |
Advisories 47
- WID-SEC-2026-0995 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- ALSA-2026:19066 Moderate: openssl security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:19218 Moderate: openssl security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:39297 Moderate: edk2 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-2919 IBM App Connect Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 27, 2026
- WID-SEC-2026-2437 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 22, 2026
- NCSC-2026-0445 Kwetsbaarheden verholpen in Oracle Analytics NCSC-NL (Netherlands) · Oct 21, 2026
- RHSA-2026:84573 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:84572 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:83617 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:7261 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:71542 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:39297 Red Hat Security Advisory: edk2 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:28832 Red Hat Security Advisory: openssl-fips-provider security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:28211 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:27745 Red Hat Security Advisory: openssl-fips-provider security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:27746 Red Hat Security Advisory: openssl-fips-provider security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:27744 Red Hat Security Advisory: openssl-fips-provider security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:19218 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:19066 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- ELSA-2026-27746 Moderate: openssl-fips-provider security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Sep 16, 2026
- ELSA-2026-27744 Moderate: openssl-fips-provider security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 28, 2026
- ELSA-2026-39297 Moderate: edk2 security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- RLSA-2026:39297 Moderate: edk2 security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 15, 2026
- ELSA-2026-19066 Moderate: openssl security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 8, 2026
- ELSA-2026-19218 Moderate: openssl security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 12, 2026
- RLSA-2026:19066 Moderate: openssl security update Rocky Linux Security Advisories · May 29, 2026
- RLSA-2026:19218 Moderate: openssl security update Rocky Linux Security Advisories · May 28, 2026
- ICSA-26-134-10 Siemens SIMATIC CISA ICS & IT advisories · May 14, 2026
- NCSC-2026-0147 Kwetsbaarheden verholpen in Siemens-producten NCSC-NL (Netherlands) · May 13, 2026
- SSA-032379 SSA-032379: Multiple Vulnerabilities in SIMATIC CN 4100 Before V5.0 Siemens ProductCERT · May 12, 2026
- openSUSE-SU-2026:20525-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-SU-2026:21186-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 22, 2026
- WID-SEC-2026-1198 Oracle Database Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- SUSE-SU-2026:21107-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 17, 2026
- SUSE-SU-2026:1375-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 17, 2026
- SUSE-SU-2026:21037-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 14, 2026
- SUSE-SU-2026:21065-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 14, 2026
- SUSE-SU-2026:1291-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · Apr 14, 2026
- ALAS2023-2026-1586 Important: openssl security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 13, 2026
- openSUSE-SU-2026:10533-1 libopenssl-3-devel-3.5.3-4.1 on GA media SUSE / openSUSE Security Updates · Apr 12, 2026
- SUSE-SU-2026:1256-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · Apr 11, 2026
- SUSE-SU-2026:1257-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Apr 11, 2026
- SUSE-SU-2026:1214-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 9, 2026
- SUSE-SU-2026:1213-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 9, 2026
- SUSE-SU-2026:1215-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 9, 2026
- SUSE-SU-2026:1216-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Apr 9, 2026
References
- OpenSSL Advisory vendor-advisory
- 3.6.2 git commit patch
- 3.5.6 git commit patch
- 3.4.5 git commit patch
- 3.3.7 git commit patch
- 3.0.20 git commit patch