Description
A vulnerability has been found in BusyBox up to 1.30.1. This vulnerability affects unknown code of the file networking/wget.c of the component FEATURE_WGET_TIMEOUT Handler. Such manipulation of the argument -T leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The name of the patch is 83a40bf7a93c8ac093d33ab452222dd5b9eb57ff. A patch should be applied to remediate this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | BusyBox | 1.30.0, 1.30.1 | — |
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 | No fix yet | — |
| 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 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 | — |
Advisories 1
- WID-SEC-2026-2907 BusyBox: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Aug 18, 2026
References
- VDB-391923 | BusyBox FEATURE_WGET_TIMEOUT wget.c null pointer dereference vdb-entry technical-description
- VDB-391923 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- CVE-2026-76014 | CVE Analysis and Report third-party-advisory
- Submit #878212 | BusyBox 1.30.1 NULL Pointer Dereference third-party-advisory
- https://github.com/mirror/busybox/issues/124 issue-tracking
- https://gist.github.com/wyxstarry/5c199ec824928c5ae5816aaecbc6df03 exploit
- https://github.com/mirror/busybox/commit/83a40bf7a93c8ac093d33ab452222dd5b9eb57ff patch