Description
A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
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 | 1:1.37.0-10.1 | — |
| Debian 13 | busybox | No fix yet | — |
| Debian 12 | busybox | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | busybox | No fix yet | — |
| Ubuntu 26.04 LTS | busybox | No fix yet | — |
| Ubuntu 25.10 | busybox | No fix yet | — |
| Ubuntu 24.04 LTS | busybox | No fix yet | — |
| Ubuntu 22.04 LTS | busybox | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | busybox | No fix yet | — |
| Ubuntu Pro 18.04 LTS | busybox | No fix yet | — |
| Ubuntu Pro 16.04 LTS | busybox | No fix yet | — |
| Ubuntu Pro 14.04 LTS | busybox | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | busybox +2 | 1.37.0-7.2.hum1 | RHSA-2026:13831 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | busybox | 1.37.0-150700.18.15.1 | SUSE-SU-2026:0759-1 |
| SLES 15 SP6 | busybox | 1.37.0-150500.10.17.1 | SUSE-SU-2026:0758-1 |
| SLES 15 SP5 | busybox | 1.37.0-150500.10.17.1 | SUSE-SU-2026:0758-1 |
| 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 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | busybox | 1.37.0-160000.5.1 | SUSE-SU-2026:20905-1 |
| SLES for SAP 15 SP6 | busybox | 1.37.0-150500.10.17.1 | SUSE-SU-2026:0758-1 |
| SLES for SAP 15 SP5 | busybox | 1.37.0-150500.10.17.1 | SUSE-SU-2026:0758-1 |
| SLES for SAP 15 SP4 | busybox | 1.35.0-150400.3.14.1 | SUSE-SU-2026:0872-1 |
| SLES 16.0 | busybox | 1.37.0-160000.5.1 | SUSE-SU-2026:20905-1 |
| SLE HPC 15 SP5 | busybox | 1.37.0-150500.10.17.1 | SUSE-SU-2026:0758-1 |
| 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 | 1.37.0-9.1 | openSUSE-SU-2026:10231-1 |
| openSUSE Leap 16.0 | busybox | 1.37.0-160000.5.1 | openSUSE-SU-2026:20387-1 |
| openSUSE Leap 15.6 | busybox | 1.37.0-150500.10.17.1 | SUSE-SU-2026:0758-1 |
| openSUSE Leap 15.6 | busybox-links | 1.37.0-150500.7.11.1 | SUSE-SU-2026:0758-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | busybox | 1.36.1-22 | — |
| Azure Linux 2 (CBL-Mariner) | busybox | 1.35.0-17 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | busybox | 1.37.0-r58 | — |
Advisories 11
- RHSA-2026:13831 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- ICSA-26-188-05 Siemens SINEC OS CISA ICS & IT advisories · Jul 7, 2026
- SSA-253495 SSA-253495: Multiple Vulnerabilities in SINEC OS before V4.0 Siemens ProductCERT · Jun 2, 2026
- WID-SEC-2026-0395 BusyBox: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 5, 2026
- SUSE-SU-2026:20905-1 Security update for busybox SUSE / openSUSE Security Updates · Apr 2, 2026
- openSUSE-SU-2026:20387-1 Security update for busybox SUSE / openSUSE Security Updates · Mar 26, 2026
- openSUSE-SU-2026:10231-1 busybox-1.37.0-9.1 on GA media 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
- SUSE-SU-2026:0759-1 Security update for busybox SUSE / openSUSE Security Updates · Mar 4, 2026
- SUSE-SU-2026:0758-1 Security update for busybox SUSE / openSUSE Security Updates · Mar 4, 2026
References
- RHSA-2026:13831 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-26158 vdb-entry
- RHBZ#2439040 issue-tracking
- https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb