Out-of-bounds write in OpenSSL - CVE-2026-63072

Vulnerability identifier: #VU145417

CSH Severity: Medium

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-63072

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds write in OpenSSL CMS decryption key unwrapping logic when decrypting a crafted CMS message through CMS_decrypt(). A remote attacker can supply a crafted CMS message to cause a denial of service.

The issue causes a deterministic 8-byte heap write immediately past the allocation when the key-wrap OID is changed to select the padded variant.

OpenSSL
Debian Linux
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
IBM i
FreeBSD
Ubuntu
SUSE Linux Enterprise Live Patching
Basesystem Module
Development Tools Module
Legacy Module
openSUSE Leap
openEuler
openssl-3-livepatches
openssl-3-livepatches-debuginfo
openssl-3-livepatches-debugsource
openssl-1_1-livepatches-debuginfo
openssl-1_1-livepatches-debugsource
openssl-1_1-livepatches
openssl (Ubuntu package)
openssl-1_1-debuginfo
libopenssl-1_1-devel
libopenssl1_1-debuginfo
libopenssl1_1-hmac
libopenssl1_1
openssl-1_1-debugsource
openssl-1_1
libopenssl1_1-hmac-32bit
libopenssl1_1-32bit
libopenssl1_1-debuginfo-32bit
libopenssl-1_1-devel-32bit
openssl
openssl-debuginfo
openssl-debugsource
openssl-devel
openssl-libs
openssl-help
libopenssl1_1-32bit-debuginfo
libopenssl1_1-hmac-64bit
openssl-1_1-doc
libopenssl1_1-64bit
libopenssl-1_1-devel-64bit
libopenssl1_1-64bit-debuginfo
compat-openssl11-libs
compat-openssl11
compat-openssl11-debuginfo
compat-openssl11-debugsource
compat-openssl11-devel
openssl-perl
libopenssl3-64bit-debuginfo
openssl-3-doc
libopenssl3-debuginfo
openssl-3-debugsource
libopenssl-3-devel-32bit
libopenssl3-32bit-debuginfo
libopenssl3-32bit
libopenssl-3-devel
openssl-3-debuginfo
openssl-3
libopenssl3
libopenssl3-64bit
libopenssl-3-devel-64bit
libopenssl-3-fips-provider
libopenssl-3-fips-provider-32bit-debuginfo
libopenssl-3-fips-provider-64bit-debuginfo
libopenssl-3-fips-provider-64bit
libopenssl-3-fips-provider-debuginfo
libopenssl-3-fips-provider-32bit
openssl (Debian package)
python3-edk2-devel
edk2-ovmf
edk2-help
edk2-aarch64
edk2-devel
edk2-debugsource
edk2-debuginfo
edk2

Install security update from vendor's website.

OpenSSL - addressed in versions 1.1.1zi, 3.0.22, 3.4.7, 3.5.8, 3.6.4, 4.0.2
openssl-3-livepatches - addressed in versions 0.6-150600.13.19.1, 0.6-150700.16.12.1
openssl-3-livepatches-debuginfo - addressed in versions 0.6-150600.13.19.1, 0.6-150700.16.12.1
openssl-3-livepatches-debugsource - addressed in versions 0.6-150600.13.19.1, 0.6-150700.16.12.1
openssl-1_1-livepatches-debuginfo - addressed in versions 0.8-150400.3.26.1, 0.8-150500.6.17.1, 0.8-150600.11.9.1, 0.8-150700.13.12.1
openssl-1_1-livepatches-debugsource - addressed in versions 0.8-150400.3.26.1, 0.8-150500.6.17.1, 0.8-150600.11.9.1, 0.8-150700.13.12.1
openssl-1_1-livepatches - addressed in versions 0.8-150400.3.26.1, 0.8-150500.6.17.1, 0.8-150600.11.9.1, 0.8-150700.13.12.1
openssl (Ubuntu package) - addressed in versions 1.0.1f-1ubuntu2.27+esm16, 1.0.2g-1ubuntu4.20+esm18, 1.0.2n-1ubuntu5.13+esm6, 1.1.1f-1ubuntu2.24+esm5, 1.1.1-1ubuntu2.1~18.04.23+esm10, 3.0.2-0ubuntu1.29, 3.0.13-0ubuntu3.15, 3.5.5-1ubuntu3.4, 3.5.5-1ubuntu3.5
openssl-1_1-debuginfo - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1, 1.1.1w-150700.11.30.1
libopenssl-1_1-devel - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1, 1.1.1w-150700.11.30.1
libopenssl1_1-debuginfo - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1, 1.1.1w-150700.11.30.1
libopenssl1_1-hmac - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1
libopenssl1_1 - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1, 1.1.1w-150700.11.30.1
openssl-1_1-debugsource - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1, 1.1.1w-150700.11.30.1
openssl-1_1 - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1, 1.1.1w-150700.11.30.1
libopenssl1_1-hmac-32bit - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1
libopenssl1_1-32bit - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1, 1.1.1w-150700.11.30.1
libopenssl1_1-debuginfo-32bit - update to 1.1.1d-2.139.1
libopenssl-1_1-devel-32bit - addressed in versions 1.1.1d-2.139.1, 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1
openssl - addressed in versions 1.1.1f-44, 1.1.1wa-18, 3.0.12-53, 3.5.6-7
openssl-debuginfo - addressed in versions 1.1.1f-44, 1.1.1wa-18, 3.0.12-53, 3.5.6-7
openssl-debugsource - addressed in versions 1.1.1f-44, 1.1.1wa-18, 3.0.12-53, 3.5.6-7
openssl-devel - addressed in versions 1.1.1f-44, 1.1.1wa-18, 3.0.12-53, 3.5.6-7
openssl-libs - addressed in versions 1.1.1f-44, 1.1.1wa-18, 3.0.12-53, 3.5.6-7
openssl-help - addressed in versions 1.1.1f-44, 1.1.1wa-18, 3.0.12-53, 3.5.6-7
libopenssl1_1-32bit-debuginfo - addressed in versions 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1, 1.1.1w-150700.11.30.1
libopenssl1_1-hmac-64bit - addressed in versions 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1
openssl-1_1-doc - addressed in versions 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1
libopenssl1_1-64bit - addressed in versions 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1
libopenssl-1_1-devel-64bit - addressed in versions 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1
libopenssl1_1-64bit-debuginfo - addressed in versions 1.1.1l-150400.7.104.1, 1.1.1l-150500.17.63.1, 1.1.1w-150600.5.38.1
compat-openssl11-libs - update to 1.1.1m-20
compat-openssl11 - update to 1.1.1m-20
compat-openssl11-debuginfo - update to 1.1.1m-20
compat-openssl11-debugsource - update to 1.1.1m-20
compat-openssl11-devel - update to 1.1.1m-20
openssl-perl - addressed in versions 1.1.1wa-18, 3.0.12-53, 3.5.6-7
libopenssl3-64bit-debuginfo - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1
openssl-3-doc - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1
libopenssl3-debuginfo - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
openssl-3-debugsource - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
libopenssl-3-devel-32bit - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1
libopenssl3-32bit-debuginfo - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
libopenssl3-32bit - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
libopenssl-3-devel - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
openssl-3-debuginfo - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
openssl-3 - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
libopenssl3 - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
libopenssl3-64bit - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1
libopenssl-3-devel-64bit - addressed in versions 3.0.8-150400.4.98.1, 3.0.8-150500.5.75.1, 3.1.4-150600.5.64.1
libopenssl-3-fips-provider - addressed in versions 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
libopenssl-3-fips-provider-32bit-debuginfo - addressed in versions 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
libopenssl-3-fips-provider-64bit-debuginfo - update to 3.1.4-150600.5.64.1
libopenssl-3-fips-provider-64bit - update to 3.1.4-150600.5.64.1
libopenssl-3-fips-provider-debuginfo - addressed in versions 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
libopenssl-3-fips-provider-32bit - addressed in versions 3.1.4-150600.5.64.1, 3.5.0-150700.5.50.1
openssl (Debian package) - update to 3.5.7-1~deb13u2
python3-edk2-devel - addressed in versions 202002-40, 202011-38, 202308-44, 202308-49, 202308-52
edk2-ovmf - addressed in versions 202002-40, 202011-38, 202308-44, 202308-49, 202308-52
edk2-help - addressed in versions 202002-40, 202011-38, 202308-44, 202308-49, 202308-52
edk2-aarch64 - addressed in versions 202002-40, 202011-38, 202308-44, 202308-49, 202308-52
edk2-devel - addressed in versions 202002-40, 202011-38, 202308-44, 202308-49, 202308-52
edk2-debugsource - addressed in versions 202002-40, 202011-38, 202308-44, 202308-49, 202308-52
edk2-debuginfo - addressed in versions 202002-40, 202011-38, 202308-44, 202308-49, 202308-52
edk2 - addressed in versions 202002-40, 202011-38, 202308-44, 202308-49, 202308-52

• https://openssl-library.org/news/secadv/20260825.txt

• Multiple vulnerabilities in OpenSSL
• Debian update for openssl
• FreeBSD update for OpenSSL
• Ubuntu update for openssl
• Ubuntu update for openssl
• SUSE update for openssl-3
• Ubuntu update for openssl
• SUSE update for openssl-3
• SUSE update for openssl-1_1
• SUSE update for openssl-1_1
• SUSE update for openssl-3
• SUSE update for openssl-1_1
• SUSE update for openssl-1_1-livepatches
• SUSE update for openssl-1_1-livepatches
• SUSE update for openssl-1_1-livepatches
• SUSE update for openssl-3-livepatches
• SUSE update for openssl-3
• SUSE update for openssl-3-livepatches
• SUSE update for openssl-1_1
• SUSE update for openssl-1_1-livepatches
• SUSE update for openssl-1_1
• openEuler 24.03 LTS SP4 update for edk2
• openEuler 24.03 LTS SP3 update for edk2
• openEuler 24.03 LTS SP4 update for openssl
• openEuler 24.03 LTS SP3 update for openssl
• openEuler 24.03 LTS SP1 update for openssl
• openEuler 22.03 LTS SP4 update for openssl
• openEuler 20.03 LTS SP4 update for openssl
• openEuler 24.03 LTS SP4 update for compat-openssl11
• openEuler 24.03 LTS SP1 update for compat-openssl11
• openEuler 24.03 LTS SP3 update for compat-openssl11
• openEuler 20.03 LTS SP4 update for edk2
• openEuler 24.03 LTS SP1 update for edk2
• openEuler 22.03 LTS SP4 update for edk2
• Multiple vulnerabilities in IBM i