github.com/ulikunitz/xz leaks memory when decoding a corrupted multiple LZMA archives
Priority MEDIUM 57CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Partial Red Hat: 2 fixed, 37 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00433 37th percentileScored 2026-11-07
Fix Partial xz (ulikunitz): 0.5.14github.com/ulikunitz/xz (Go): 0.5.15Red Hat: 3 advisoriesRed Hat: 2 fixed, 37 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ulikunitz | xz | before 0.5.14 | 0.5.14 | Patch available | CNA |
| — | github.com/ulikunitz/xz (Go) | before 0.5.15 | 0.5.15 | Patch available | GHSA-jc7w-c686-c4v9 |
- xz Vendorulikunitz Affected before 0.5.14 Fixed in 0.5.14 Patch available CNA
- github.com/ulikunitz/xz (Go) Vendor— Affected before 0.5.15 Fixed in 0.5.15 Patch available GHSA-jc7w-c686-c4v9
Remediation
- Fix · CNA xz (ulikunitz) Fixed in 0.5.14
- Fix · GHSA-jc7w-c686-c4v9 github.com/ulikunitz/xz (Go) Fixed in 0.5.15 Advisory →
Red Hat 3 advisories
- RHSA-2026:37387 Released 2026-07-09 · Red Hat rating ImportantRed Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update
- Red Hat Openshift Data Foundation 4.22 registry.redhat.io/odf4/cephcsi-rhel9, registry.redhat.io/odf4/cephcsi-rhel9-operator, registry.redhat.io/odf4/devicefinder-rhel9 +24
- RHSA-2026:26257 Released 2026-06-16 · Red Hat rating ImportantAssisted Installer RHEL 8 components for Multicluster Engine for Kubernetes 2.8.8
- multicluster engine for Kubernetes 2.8 registry.redhat.io/multicluster-engine/assisted-service-8-rhel8
- RHSA-2026:26254 Released 2026-06-16 · Red Hat rating ImportantAssisted Installer RHEL 9 components for Multicluster Engine for Kubernetes 2.8.8
- multicluster engine for Kubernetes 2.8 registry.redhat.io/multicluster-engine/assisted-service-9-rhel9
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Assisted Installer for Red Hat OpenShift Container Platform 2 | Affected | No fix yet: Fix deferred |
| Confidential Compute Attestation | Affected | No fix yet: Fix deferred |
| Kernel Module Management Operator for Red Hat Openshift | Affected | No fix yet: Fix deferred |
| Logging Subsystem for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Logical Volume Manager Storage | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Containers | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Virtualization | Affected | No fix yet: Fix deferred |
| Multicluster Engine for Kubernetes | Affected | No fix yet: Fix deferred |
| Network Observability Operator | Affected | No fix yet: Fix deferred |
| Node HealthCheck Operator | Affected | No fix yet: Fix deferred |
| OpenShift API for Data Protection | Affected | No fix yet: Fix deferred |
| OpenShift Developer Tools and Services | Affected | No fix yet: Fix deferred |
| OpenShift Lightspeed | Affected | No fix yet: Fix deferred |
| OpenShift Pipelines | Affected | No fix yet: Fix deferred |
| OpenShift Serverless | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 3 | Affected | No fix yet: Fix deferred |
| OpenShift Source-to-Image (S2I) | Affected | No fix yet: Fix deferred |
| Power monitoring for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Security 4 | Affected | No fix yet: Fix deferred |
| Red Hat Build of Kueue | Affected | No fix yet: Fix deferred |
| Red Hat Developer Hub 1 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AI (RHEL AI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift GitOps | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 18.0 | Affected | No fix yet: Fix deferred |
| Red Hat Quay 3 | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Application Pipeline | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Artifact Signer | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet: Fix deferred |
| Red Hat Openshift Data Foundation 4.22 | Fixed | RHSA-2026:37387 |
| multicluster engine for Kubernetes 2.8 | Fixed | RHSA-2026:26254, RHSA-2026:26257 |
Not affected: 2 products
- Red Hat Openshift Data Foundation 4.22
- multicluster engine for Kubernetes 2.8
Timeline
- 2026-10-02 Threatist record created from CVE-2025-58058
- 2026-10-03 Alias added: GHSA-jc7w-c686-c4v9
- 2026-10-27 Affected versions changed · Red Hat
References
Sources
- CVE-2025-58058 · CVE Program
- CVE-2025-58058 · NVD
- FIRST EPSS
- GHSA-jc7w-c686-c4v9 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-58058 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences