Description
Issue summary: If an application using the SSL_CIPHER_find() function in
a QUIC protocol client or server receives an unknown cipher suite from
the peer, a NULL dereference occurs.
Impact summary: A NULL pointer dereference leads to abnormal termination of
the running process causing Denial of Service.
Some applications call SSL_CIPHER_find() from the client_hello_cb callback
on the cipher ID received from the peer. If this is done with an SSL object
implementing the QUIC protocol, NULL pointer dereference will happen if
the examined cipher ID is unknown or unsupported.
As it is not very common to call this function in applications using the QUIC
protocol and the worst outcome is Denial of Service, the issue was assessed
as Low severity.
The vulnerable code was introduced in the 3.2 version with the addition
of the QUIC protocol support.
The FIPS modules in 3.6, 3.5, 3.4 and 3.3 are not affected by this issue,
as the QUIC implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4 and 3.3 are vulnerable to this issue.
OpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | 3.6.0 – < 3.6.1, 3.5.0 – < 3.5.5, 3.4.0 – < 3.4.4, 3.3.0 – < 3.3.6 | 3.6.1 |
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 | 3.5.5-1 | — |
| Debian 13 | openssl | 3.5.4-1~deb13u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | openssl | 3.5.5-1ubuntu1 | — |
| Ubuntu 25.10 | openssl | 3.5.3-1ubuntu3 | USN-7980-1 |
| Ubuntu 24.04 LTS | openssl | 3.0.13-0ubuntu3.7 | USN-7980-1 |
| Ubuntu 22.04 LTS | openssl | 3.0.2-0ubuntu1.21 | USN-7980-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | nodejs | No fix yet | — |
| Ubuntu Pro 18.04 LTS | nodejs | No fix yet | — |
| Ubuntu Pro 16.04 LTS | nodejs | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | openssl +3 | 1:3.5.1-7.el10_1 | RHSA-2026:1472 |
| RHEL 9 | openssl +3 | 1:3.5.1-7.el9_7 | RHSA-2026:1473 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | openssl +5 | 3.5.6-0.1.hum1 | RHSA-2026:7261 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | openssl +3 | 1:3.5.1-7.el10_1.alma.1 | ALSA-2026:1472 |
| AlmaLinux 9 | openssl +3 | 1:3.5.1-7.el9_7 | ALSA-2026:1473 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | openssl | 1:3.5.1-7.el10_1 | RLSA-2026:1472 |
| Rocky Linux 9 | openssl | 1:3.5.1-7.el9_7 | RLSA-2026:1473 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | openssl-3 | 3.5.0-160000.5.1 | SUSE-SU-2026:20223-1 |
| SLES for SAP 16.0 | openssl-3-livepatches | 0.3-160000.1.1 | SUSE-SU-2026:20607-1 |
| SLES 16.0 | openssl-3 | 3.5.0-160000.5.1 | SUSE-SU-2026:20223-1 |
| SLES 16.0 | openssl-3-livepatches | 0.3-160000.1.1 | SUSE-SU-2026:20607-1 |
| SLE Micro 6.2 | openssl-3 | 3.5.0-160000.5.1 | SUSE-SU-2026:20211-1 |
| SLE Micro 6.2 | openssl-3-livepatches | 0.3-160000.1.1 | SUSE-SU-2026:20542-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | openssl-3-livepatches | 0.4-slfo.1.1_1.1 | SUSE-SU-2026:22143-1 |
| SLE Live Patching 15 SP7 | openssl-3-livepatches | 0.4-150700.16.6.1 | SUSE-SU-2026:2662-1 |
| SLE Live Patching 15 SP6 | openssl-3-livepatches | 0.4-150600.13.11.1 | SUSE-SU-2026:2411-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-3 | 3.5.3-2.1 | openSUSE-SU-2026:10237-1 |
| openSUSE Leap 16.0 | openssl-3 | 3.5.0-160000.5.1 | openSUSE-SU-2026:20152-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openssl | 3.5.5-r0 | — |
| Alpine v3.23 | openssl | 3.5.5-r0 | — |
| Alpine v3.22 | openssl | 3.5.5-r0 | — |
| Alpine v3.21 | openssl | 3.3.6-r0 | — |
| Alpine v3.20 | openssl | 3.3.6-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | openssl +5 | 1:3.2.2-1.amzn2023.0.5 | ALAS2023-2026-1434 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | openssl | 3.3.5-3 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | openssl +3 | 1:3.5.1-7.0.1.el10_1 | ELSA-2026-1472 |
| Oracle Linux 9 | openssl +3 | 1:3.5.1-7.0.1.el9_7 | ELSA-2026-50075, ELSA-2026-1473 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | openssl | 3.6.1-r0 | — |
Advisories 24
- WID-SEC-2026-0234 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2026
- ALSA-2026:1472 Important: openssl security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:1473 Important: openssl security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-7980-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 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-2026:1473 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:1472 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- WID-SEC-2026-2253 IBM Security Verify Access: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- WID-SEC-2026-1730 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 2026
- SUSE-SU-2026:2662-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Jun 27, 2026
- SUSE-SU-2026:22143-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Jun 18, 2026
- SUSE-SU-2026:2411-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Jun 17, 2026
- openSUSE-SU-2026:20152-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10237-1 libopenssl-3-devel-3.5.3-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20607-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20542-1 Security update for openssl-3-livepatches SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20223-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20211-1 Security update for openssl-3 SUSE / openSUSE Security Updates · Mar 23, 2026
- ALAS2023-2026-1434 Important: openssl security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 18, 2026
- RLSA-2026:1472 Important: openssl security update Rocky Linux Security Advisories · Jan 30, 2026
- RLSA-2026:1473 Important: openssl security update Rocky Linux Security Advisories · Jan 30, 2026
- ELSA-2026-50075 Important: openssl security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jan 29, 2026
- ELSA-2026-1473 Important: openssl security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jan 28, 2026
- ELSA-2026-1472 Important: openssl security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jan 28, 2026
References
- OpenSSL Advisory vendor-advisory
- 3.6.1 git commit patch
- 3.5.5 git commit patch
- 3.4.4 git commit patch
- 3.3.6 git commit patch