Description
basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.
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 | systemd | 247.3-6 | — |
| Debian 13 | systemd | 247.3-6 | — |
| Debian 12 | systemd | 247.3-6 | — |
| Debian 10 | systemd | 241-7~deb10u8 | DSA-4942-1 |
| Debian 9 | systemd | 232-25+deb9u13 | DLA-2715-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | systemd | 245.4-4ubuntu3.10 | USN-5013-1 |
| Ubuntu 18.04 LTS | systemd | 237-3ubuntu10.49 | USN-5013-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | systemd | 229-4ubuntu21.31+esm1 | USN-5013-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | systemd +7 | 239-45.el8_4.2 | RHSA-2021:2717 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhev Hypervisor 4 | redhat-virtualization-host +1 | 4.4.7-20210715.1.el8_4 | RHSA-2021:2736 |
| RHEL 8.2 EUS | systemd +7 | 239-31.el8_2.4 | RHSA-2021:2721 |
| RHEL 8.1 EUS | systemd +7 | 239-18.el8_1.8 | RHSA-2021:2724 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | systemd | 239-45.el8_4.2 | RLSA-2021:2717 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | systemd | 246.13-7.8.1 | SUSE-SU-2021:2809-1, SUSE-SU-2021:2410-1 |
| SLES 15 SP2 | systemd | 234-24.90.1 | SUSE-SU-2021:3348-1, SUSE-SU-2021:2404-1 |
| SLES 12 SP5 | systemd | 228-157.30.1 | SUSE-SU-2021:3611-1, SUSE-SU-2021:2405-1 |
| SLES 12 SP4 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
| SLES 12 SP3 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
| SLES for SAP 12 SP5 | systemd | 228-157.30.1 | SUSE-SU-2021:3611-1, SUSE-SU-2021:2405-1 |
| SLES for SAP 12 SP4 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
| SLES for SAP 12 SP3 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
| SUSE OpenStack Cloud Crowbar 9 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
| SUSE OpenStack Cloud Crowbar 8 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
| SUSE OpenStack Cloud 9 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
| SUSE OpenStack Cloud 8 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
| SUSE HPE Helion OpenStack 8 | systemd | 228-150.98.1 | SUSE-SU-2021:2423-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | systemd | 249.4-2.2 | openSUSE-SU-2024:11420-1 |
| openSUSE Leap 15.3 | systemd | 234-24.90.1 | openSUSE-SU-2021:3348-1, openSUSE-SU-2021:2809-1, openSUSE-SU-2021:2410-1 |
| openSUSE Leap 15.2 | systemd +1 | 234-lp152.31.31.1 | openSUSE-SU-2021:1370-1, openSUSE-SU-2021:1082-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | systemd +7 | 239-45.0.2.el8_4.2 | ELSA-2021-2717 |
Advisories 28
- 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
- RHSA-2021:2736 Red Hat Security Advisory: Red Hat Virtualization Host security and bug fix update [ovirt-4.4.7] Red Hat Security Advisories (RHSA) · Aug 14, 2026
- USN-5013-2 systemd vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5013-1 systemd vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4942-1 systemd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2715-1 systemd - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:2717 Important: systemd security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2021:1082-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2405-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2809-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1370-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3348-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2410-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2410-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2404-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3348-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11420-1 libsystemd0-249.4-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2423-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2404-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2809-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3611-1 Security update for systemd SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2021:2724 Red Hat Security Advisory: systemd security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2021:2721 Red Hat Security Advisory: systemd security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2021:2717 Red Hat Security Advisory: systemd security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- ICSA-22-167-09 Siemens SCALANCE LPE9403 Third-Party Vulnerabilities CISA ICS & IT advisories · Jun 14, 2022
- SSA-222547 SSA-222547: Third-Party Component Vulnerabilities in SCALANCE LPE9403 before V2.0 Siemens ProductCERT · Jun 14, 2022
- ELSA-2021-2717 Important: systemd security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 21, 2021
References
- https://github.com/systemd/systemd/pull/20256/commits/441e0115646d54f080e5c3bb0ba477c892861ab9
- https://www.openwall.com/lists/oss-security/2021/07/20/2
- GLSA-202107-48 vendor-advisory
- DSA-4942 vendor-advisory
- http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html
- https://github.com/systemd/systemd/commit/b34a4f0e6729de292cb3b0c03c1d48f246ad896b
- https://github.com/systemd/systemd-stable/commit/cfd14c65374027b34dbbc4f0551456c5dc2d1f61
- https://github.com/systemd/systemd-stable/commit/b00674347337b7531c92fdb65590ab253bb57538
- https://github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d19733b
- https://github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136ce
- FEDORA-2021-2a6ba64260 vendor-advisory
- FEDORA-2021-166e461c8d vendor-advisory
- [oss-security] 20210804 Re: Pop!_OS Membership to linux-distros list mailing-list
- [oss-security] 20210817 Re: Pop!_OS Membership to linux-distros list mailing-list
- [oss-security] 20210907 Re: Pop!_OS Membership to linux-distros list mailing-list
- https://security.netapp.com/advisory/ntap-20211104-0008/
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf