Description
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | busybox | No fix yet | — |
| Ubuntu 26.04 LTS | busybox | No fix yet | — |
| Ubuntu 24.04 LTS | busybox | No fix yet | — |
| Ubuntu 22.04 LTS | busybox | No fix yet | — |
| Ubuntu 20.04 LTS | busybox | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | 1:1.37.0-9.4.hum1 | RHSA-2026:81391 |
Advisories 2
- RHSA-2026:81391 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2026-4524 BusyBox: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
References
- RHSA-2026:81391 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-124745 vdb-entry
- RHBZ#2571637 issue-tracking