Description
It was possible to improperly access the parent directory of an os.Root by opening a filename ending in "../". For example, Root.Open("../") would open the parent directory of the Root. This escape only permits opening the parent directory itself, not ancestors of the parent or files contained within the parent.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Go standard library | os | < 1.23.9, 1.24.0-0 – < 1.24.3 | 1.23.9 |
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 13 | golang-1.24 | 1.24.4-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | golang-1.24 | No fix yet | — |
| Ubuntu 25.10 | golang-1.24 | No fix yet | — |
| Ubuntu 24.04 LTS | golang-1.24 | No fix yet | — |
| Ubuntu 22.04 LTS | golang-1.24 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | golang1.25 +6 | 1.25.9-1.hum1 | RHSA-2026:7385 |
| Red Hat Hardened Images 1 | golang1.26 +6 | 1.26.2-1.hum1 | RHSA-2026:7291 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:01846-1, SUSE-SU-2025:01551-1 |
| SLES 15 SP6 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SLES 15 SP5 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SLES 15 SP4 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SLES 15 SP3 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SLES for SAP 15 SP4 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SLES for SAP 15 SP3 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SLE HPC 15 SP5 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SLE HPC 15 SP4 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SLE HPC 15 SP3 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| SUSE Enterprise Storage 7.1 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | go1.24 | 1.24.3-1.1 | openSUSE-SU-2025:15058-1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
| openSUSE Leap 15.6 | go1.24 | 1.24.3-150000.1.23.1 | SUSE-SU-2025:1551-1, SUSE-SU-2025:01846-1 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20260205T172317-150000.1.146.1 | SUSE-SU-2026:0403-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | go | 1.24.3-r0 | — |
| Alpine v3.23 | go | 1.24.3-r0 | — |
| Alpine v3.22 | go | 1.24.3-r0 | — |
| Alpine v3.21 | go | 1.23.9-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | golang +6 | 1.24.3-1.amzn2023.0.1 | ALAS2023-2025-977 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | go-1.20 +1 | No fix yet | — |
| Wolfi rolling | katib-earlystopping +8 | 0.19.0-r31 | — |
| Wolfi rolling | katib-suggestion-goptuna-compat | 0.19.0-r40 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | stdlib | < 1.23.9 · >= 1.24.0-0, < 1.24.3 | 1.23.9, 1.24.3 | GO-2026-4403 |
Advisories 10
- RHSA-2026:7385 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:7291 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- WID-SEC-2025-0953 Golang Go: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · May 3, 2026
- openSUSE-SU-2025:15058-1 go1.24-1.24.3-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0403-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:01551-1 Security update for go1.24 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:01846-1 Security update for go1.24 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1551-1 Security update for go1.24 SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2025-977 Moderate: golang security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 2, 2025