Description
A use-after-free vulnerability in BusyBox v.1.36.1 allows attackers to cause a denial of service via a crafted awk pattern in the awk.c evaluate function.
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 | busybox | 1:1.37.0-1 | — |
| Debian 13 | busybox | 1:1.37.0-1 | — |
| Debian 12 | busybox | 1:1.35.0-4+deb12u1 | — |
| Debian 11 | busybox | 1:1.30.1-6+deb11u1 | DLA-4019-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | busybox | 1:1.36.1-6ubuntu3.1 | USN-6961-1 |
| Ubuntu 22.04 LTS | busybox | 1:1.30.1-7ubuntu3.1 | USN-6961-1 |
| Ubuntu 20.04 LTS | busybox | 1:1.30.1-4ubuntu6.5 | USN-6961-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | busybox | 1.37.0-150700.18.4.1 | SUSE-SU-2025:03205-1 |
| SLES 15 SP6 | busybox | 1.37.0-150500.10.11.1 | SUSE-SU-2025:03271-1 |
| SLES 15 SP5 | busybox | 1.37.0-150500.10.11.1 | SUSE-SU-2025:03271-1 |
| SLES 15 SP4 | busybox | 1.35.0-150400.3.14.1 | SUSE-SU-2026:0872-1 |
| SLES 12 SP5 | busybox | 1.35.0-10.3.1 | SUSE-SU-2026:0892-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | busybox | 1.37.0-150500.10.11.1 | SUSE-SU-2025:03271-1 |
| SLES for SAP 15 SP4 | busybox | 1.35.0-150400.3.14.1 | SUSE-SU-2026:0872-1 |
| SLE HPC 15 SP5 | busybox | 1.37.0-150500.10.11.1 | SUSE-SU-2025:03271-1 |
| SLE HPC 15 SP4 | busybox | 1.35.0-150400.3.14.1 | SUSE-SU-2026:0872-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | busybox | 1.37.0-5.1 | openSUSE-SU-2025:15361-1 |
| openSUSE Leap 15.6 | busybox | 1.37.0-150500.10.11.1 | SUSE-SU-2025:03271-2, SUSE-SU-2025:03271-1 |
| openSUSE Leap 15.6 | busybox-links | 1.37.0-150500.7.7.2 | SUSE-SU-2025:03271-2, SUSE-SU-2025:03271-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | busybox | 1.36.1-r30 | — |
| Alpine v3.23 | busybox | 1.36.1-r30 | — |
| Alpine v3.22 | busybox | 1.36.1-r30 | — |
| Alpine v3.21 | busybox | 1.36.1-r30 | — |
| Alpine v3.20 | busybox | 1.36.1-r29 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | busybox | 1.36.1-r19 | — |
| Alpine v3.18 | busybox | 1.36.1-r7 | — |
| Alpine v3.17 | busybox | 1.35.0-r31 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | busybox | 1.36.1-7 | — |
| Azure Linux 2 (CBL-Mariner) | busybox | 1.35.0-11 | — |
Advisories 11
- WID-SEC-2023-3011 BusyBox: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 15, 2026
- USN-6961-1 busybox vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:15361-1 busybox-1.37.0-5.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03205-1 Security update for busybox, busybox-links SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03271-2 Security update for busybox, busybox-links SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0892-1 Security update for busybox SUSE / openSUSE Security Updates · Mar 14, 2026
- SUSE-SU-2026:0872-1 Security update for busybox SUSE / openSUSE Security Updates · Mar 13, 2026
- DLA-4019-1 busybox - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ICSA-26-043-06 Siemens SINEC OS CISA ICS & IT advisories · Feb 25, 2026
- SSA-089022 SSA-089022: Multiple Vulnerabilities in Third-Party Components in SINEC OS before V3.3 Siemens ProductCERT · Feb 24, 2026
- SUSE-SU-2025:03271-1 Security update for busybox, busybox-links SUSE / openSUSE Security Updates · Feb 4, 2026