Description
xz is a pure golang package for reading and writing xz-compressed files. Prior to version 0.5.14, it is possible to put data in front of an LZMA-encoded byte stream without detecting the situation while reading the header. This can lead to increased memory consumption because the current implementation allocates the full decoding buffer directly after reading the header. The LZMA header doesn't include a magic number or has a checksum to detect such an issue according to the specification. Note that the code recognizes the issue later while reading the stream, but at this time the memory allocation has already been done. This issue has been patched in version 0.5.14.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ulikunitz | xz | < 0.5.14 | — |
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 | golang-github-ulikunitz-xz | 0.5.15-1 | — |
| Debian 13 | golang-github-ulikunitz-xz | No fix yet | — |
| Debian 12 | golang-github-ulikunitz-xz | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | golang-github-ulikunitz-xz | No fix yet | — |
| Ubuntu 26.04 LTS | golang-github-ulikunitz-xz | No fix yet | — |
| Ubuntu 25.10 | golang-github-ulikunitz-xz | No fix yet | — |
| Ubuntu 24.04 LTS | golang-github-ulikunitz-xz | No fix yet | — |
| Ubuntu 22.04 LTS | golang-github-ulikunitz-xz | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | golang-github-ulikunitz-xz | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | alloy | 1.11.3-150700.15.9.1 | SUSE-SU-2025:4121-1 |
| SLES 15 SP7 | containerized-data-importer | 1.64.0-150700.9.14.1 | SUSE-SU-2026:4209-1 |
| SLES 15 SP7 | rekor | 1.4.3-150400.4.28.1 | SUSE-SU-2026:0383-1 |
| SLES 15 SP7 | warewulf4 | 4.6.4-150500.6.37.1 | SUSE-SU-2025:03448-1 |
| SLES 15 SP6 | govulncheck-vulndb | 0.0.20250918T182144-150000.1.107.1 | SUSE-SU-2025:03289-1 |
| SLES 15 SP6 | warewulf4 | 4.6.4-150500.6.37.1 | SUSE-SU-2025:03448-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | alloy | 1.11.3-160000.1.1 | SUSE-SU-2025:21137-1 |
| SLES 16.0 | alloy | 1.11.3-160000.1.1 | SUSE-SU-2025:21137-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | alloy | 1.11.2-2.1 | openSUSE-SU-2025:15631-1 |
| openSUSE Tumbleweed | containerized-data-importer1.65 | 1.65.0-2.1 | openSUSE-SU-2026:11305-1 |
| openSUSE Tumbleweed | containerized-data-importer1.66 | 1.66.0-1.1 | openSUSE-SU-2026:11514-1 |
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250917T170349-1.1 | openSUSE-SU-2025:15564-1 |
| openSUSE Tumbleweed | hauler | 1.3.1-1.1 | openSUSE-SU-2025:15722-1 |
| openSUSE Tumbleweed | regclient | 0.9.2-1.1 | openSUSE-SU-2025:15515-1 |
| openSUSE Tumbleweed | rekor | 1.4.1-1.1 | openSUSE-SU-2025:15508-1 |
| openSUSE Tumbleweed | sbctl | 0.17-2.1 | openSUSE-SU-2025:15509-1 |
| openSUSE Tumbleweed | tailscale | 1.86.5-1.1 | openSUSE-SU-2025:15503-1 |
| openSUSE Tumbleweed | trivy | 0.66.0-1.1 | openSUSE-SU-2025:15542-1 |
| openSUSE Tumbleweed | velociraptor | 0.7.0.4.git185.a5708584-2.1 | openSUSE-SU-2026:11126-1 |
| openSUSE Tumbleweed | warewulf4 | 4.6.4-1.1 | openSUSE-SU-2025:15537-1 |
| openSUSE Leap 16.0 | alloy | 1.11.3-160000.1.1 | openSUSE-SU-2025:20073-1 |
| openSUSE Leap 16.0 | containerized-data-importer1.65 | 1.65.0-160000.3.1 | openSUSE-SU-2026:21824-1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
| openSUSE Leap 16.0 | hauler | 1.3.1-bp160.1.1 | openSUSE-SU-2025:20160-1 |
| openSUSE Leap 16.0 | sbctl | 0.18-bp160.1.1 | openSUSE-SU-2026:20105-1 |
| openSUSE Leap 16.0 | tailscale | 1.94.1-bp160.1.1 | openSUSE-SU-2026:20192-1 |
| openSUSE Leap 16.0 | warewulf4 | 4.6.4-bp160.1.1 | openSUSE-SU-2026:21151-1, openSUSE-SU-2025:20031-1 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20250918T182144-150000.1.107.1 | SUSE-SU-2025:03289-1 |
| openSUSE Leap 15.6 | rekor | 1.4.3-150400.4.28.1 | SUSE-SU-2026:0383-1 |
| openSUSE Leap 15.6 | warewulf4 | 4.6.4-150500.6.37.1 | SUSE-SU-2025:03448-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | buildah | 1.41.4-2 | — |
| Azure Linux 3 | containerized-data-importer | 1.57.0-16 | — |
| Azure Linux 3 | cri-o | No fix yet | — |
| Azure Linux 3 | jx | 3.10.182-3 | — |
| Azure Linux 3 | packer | 1.9.5-10 | — |
| Azure Linux 3 | podman | 5.6.1-2 | — |
| Azure Linux 3 | skopeo | 1.14.4-6 | — |
| Azure Linux 2 (CBL-Mariner) | containerized-data-importer | 1.55.0-25 | — |
| Azure Linux 2 (CBL-Mariner) | cri-o | 1.22.3-16 | — |
| Azure Linux 2 (CBL-Mariner) | jx | 3.2.236-23 | — |
| Azure Linux 2 (CBL-Mariner) | packer | 1.9.5-15 | — |
| Azure Linux 2 (CBL-Mariner) | podman +1 | No fix yet | — |
| Azure Linux 2 (CBL-Mariner) | skopeo | 1.14.2-12 | — |
| Azure Linux 2 (CBL-Mariner) | terraform | 1.3.2-27 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | envoy-gateway +2 | 1.5.0-r3 | — |
| Wolfi rolling | filebrowser +1 | 2.42.5-r1 | — |
| Wolfi rolling | gitleaks | 8.28.0-r2 | — |
| Wolfi rolling | gitness | 3.3.0-r23 | — |
| Wolfi rolling | gptscript | 0.9.5-r15 | — |
| Wolfi rolling | grafana-alloy | 1.10.2-r3 | — |
| Wolfi rolling | guac +4 | 1.0.0-r5 | — |
| Wolfi rolling | k9s | 0.50.9-r8 | — |
| Wolfi rolling | kubescape-operator | 0.2.103-r1 | — |
| Wolfi rolling | nsc | 2.11.1-r1 | — |
| Wolfi rolling | nuclei | 3.4.10-r1 | — |
| Wolfi rolling | opentofu-1.9 | 1.9.3-r4 | — |
| Wolfi rolling | podman +1 | 5.6.0-r1 | — |
| Wolfi rolling | rancher-fleet +4 | 0.13.1-r1 | — |
| Wolfi rolling | steampipe | 2.1.0-r6 | — |
| Wolfi rolling | terraform +2 | 1.5.7-r32 | — |
| Wolfi rolling | terragrunt +1 | 0.86.2-r1 | — |
| Wolfi rolling | tflint +1 | 0.58.1-r5 | — |
| Wolfi rolling | trivy | 0.65.0-r5 | — |
| Wolfi rolling | trivy-operator | 0.28.0-r3 | — |
| Wolfi rolling | trufflehog | 3.90.5-r1 | — |
| Wolfi rolling | undock | 0.10.0-r4 | — |
| Wolfi rolling | vcluster +2 | 0.27.0-r1 | — |
| Wolfi rolling | xeol +1 | 0.10.8-r13 | — |
| Wolfi rolling | zarf | 0.61.0-r1 | — |
| Wolfi rolling | zot | 2.1.7-r4 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/ulikunitz/xz | < 0.5.15 | 0.5.15 | GHSA-jc7w-c686-c4v9 |
Advisories 26
- SUSE-SU-2026:4209-1 Security update for containerized-data-importer SUSE / openSUSE Security Updates · Sep 16, 2026
- openSUSE-SU-2026:21824-1 Security update for containerized-data-importer1.65 SUSE / openSUSE Security Updates · Sep 12, 2026
- openSUSE-SU-2026:11514-1 containerized-data-importer1.66-api-1.66.0-1.1 on GA media SUSE / openSUSE Security Updates · Aug 16, 2026
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- openSUSE-SU-2026:11305-1 containerized-data-importer1.65-api-1.65.0-2.1 on GA media SUSE / openSUSE Security Updates · Jul 19, 2026
- openSUSE-SU-2026:21151-1 Security update for warewulf4 SUSE / openSUSE Security Updates · Jun 30, 2026
- openSUSE-SU-2026:11126-1 velociraptor-0.7.0.4.git185.a5708584-2.1 on GA media SUSE / openSUSE Security Updates · Jun 26, 2026
- openSUSE-SU-2026:20192-1 Security update for tailscale SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:20105-1 Security update for sbctl SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:20160-1 Security update for hauler SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:20073-1 Security update for alloy SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:20031-1 Security update for warewulf4 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15722-1 hauler-1.3.1-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15631-1 alloy-1.11.2-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15564-1 govulncheck-vulndb-0.0.20250917T170349-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15542-1 trivy-0.66.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15537-1 warewulf4-4.6.4-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15515-1 regclient-0.9.2-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15508-1 rekor-1.4.1-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15509-1 sbctl-0.17-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15503-1 tailscale-1.86.5-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0383-1 Security update for rekor SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21137-1 Security update for alloy SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4121-1 Security update for alloy SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03448-1 Security update for warewulf4 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:03289-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Feb 4, 2026