Description
Issue summary: An uncommon configuration of clients performing DANE TLSA-based
server authentication, when paired with uncommon server DANE TLSA records, may
result in a use-after-free and/or double-free on the client side.
Impact summary: A use after free can have a range of potential consequences
such as the corruption of valid data, crashes or execution of arbitrary code.
However, the issue only affects clients that make use of TLSA records with both
the PKIX-TA(0/PKIX-EE(1) certificate usages and the DANE-TA(2) certificate
usage.
By far the most common deployment of DANE is in SMTP MTAs for which RFC7672
recommends that clients treat as 'unusable' any TLSA records that have the PKIX
certificate usages. These SMTP (or other similar) clients are not vulnerable
to this issue. Conversely, any clients that support only the PKIX usages, and
ignore the DANE-TA(2) usage are also not vulnerable.
The client would also need to be communicating with a server that publishes a
TLSA RRset with both types of TLSA records.
No FIPS modules are affected by this issue, the problem code is outside the
FIPS module boundary.
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, 1.1.1 – < 1.1.1zg | 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 | edk2 | No fix yet | — |
| Ubuntu 22.04 LTS | openssl | 3.0.2-0ubuntu1.23 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | openssl | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | openssl | No fix yet | — |
| Ubuntu Pro FIPS-updates 24.04 LTS | openssl-fips | 3.0.13-0ubuntu3.12+Fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | openssl | 3.0.2-0ubuntu1.23+Fips1 | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | openssl-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | openssl | 1.1.1f-1ubuntu2.fips.24.3 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | openssl | 1.1.1-1ubuntu2.fips.2.1~18.04.23.8 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | openssl +1 | No fix yet | — |
| Ubuntu Pro 22.04 LTS | nodejs | No fix yet | — |
| Ubuntu Pro 20.04 LTS | edk2 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | openssl | 1.1.1f-1ubuntu2.24+esm3 | — |
| Ubuntu Pro 18.04 LTS | edk2 +1 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | openssl | 1.1.1-1ubuntu2.1~18.04.23+esm8 | — |
| Ubuntu Pro 16.04 LTS | edk2 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | openssl +5 | 3.5.6-0.1.hum1 | RHSA-2026:7261 |
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-1_1 | 1.1.1w-150700.11.16.1 | SUSE-SU-2026:1386-1 |
| 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-1_1 | 1.1.1w-150600.5.26.2 | SUSE-SU-2026:1577-1 |
| 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-1_1 | 1.1.1l-150500.17.51.1 | SUSE-SU-2026:1290-1 |
| 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 |
| SLES 12 SP5 | openssl-1_1 | 1.1.1d-2.125.1 | SUSE-SU-2026:1255-1 |
Show 14 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-1_1 | 1.1.1w-150600.5.26.2 | SUSE-SU-2026:1577-1 |
| 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-1_1 | 1.1.1l-150500.17.51.1 | SUSE-SU-2026:1290-1 |
| 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 5.5 | openssl-1_1 | 1.1.1l-150500.17.51.1 | SUSE-SU-2026:1290-1 |
| 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-1_1 | 1.1.1l-150500.17.51.1 | SUSE-SU-2026:1290-1 |
| 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 |
| Amazon Linux 2 | edk2-ovmf +3 | 20240813-307.amzn2 | ALAS2-2026-3275 |
| Amazon Linux 2 | openssl11 +3 | 1:1.1.1zg-1.amzn2.0.1 | ALAS2-2026-3249 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | openssl | 3.3.7-2 | — |
| Azure Linux 3 | openssl-fips-provider | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | openssl +1 | 3.6.2-r0 | — |
Advisories 29
- WID-SEC-2026-0995 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 10, 2026
- NCSC-2026-0445 Kwetsbaarheden verholpen in Oracle Analytics NCSC-NL (Netherlands) · Oct 21, 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
- SSA-265688 SSA-265688: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 TM MFP V1.1 Siemens ProductCERT · Oct 13, 2026
- ICSA-26-134-10 Siemens SIMATIC CISA ICS & IT advisories · May 14, 2026
- ICSA-24-102-01 Siemens SIMATIC S7-1500 TM MFP 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
- ALAS2-2026-3275 Important: edk2 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 29, 2026
- SUSE-SU-2026:1577-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Apr 24, 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
- SUSE-SU-2026:21107-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Apr 17, 2026
- SUSE-SU-2026:1386-1 Security update for openssl-1_1 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-2026:1290-1 Security update for openssl-1_1 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
- ALAS2-2026-3249 Important: openssl11 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 13, 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-2026:1255-1 Security update for openssl-1_1 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