Severity by source
AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
Local vector confirmed by container-local access requirement; AC:H because exploitation requires non-default /dev omission; S:C because the write escapes container boundary to the host; C:N because no data is read.
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
Lifecycle Timeline
2DescriptionCVE.org
A flaw was found in crun. When the container configuration does not give /dev a dedicated mount, terminal setup can redirect /dev/console onto an attacker-controlled path, including via the read-only-rootfs bind-mount fallback. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.
AnalysisAI
Integrity escape in crun 1.29.1 and earlier allows a low-privileged local attacker to redirect /dev/console to an attacker-controlled filesystem path, breaking container boundary isolation. The flaw (CWE-59, improper link resolution) triggers during terminal setup when a container configuration omits a dedicated /dev mount, including via the read-only-rootfs bind-mount fallback path, resulting in a scope-changed integrity impact on the host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires all three of the following conditions simultaneously: (1) the container OCI configuration must omit a dedicated /dev mount - the default OCI runtime behavior of mounting a fresh /dev tmpfs is explicitly NOT vulnerable per vendor statement; (2) the attacking process must have low-privileged local access within the affected container (PR:L from CVSS); and (3) terminal/console setup (tty allocation) must be triggered during container initialization. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N, score 5.6) captures the key constraints accurately: local access only, high complexity driven by the non-default /dev configuration requirement, and a scope-changed high-integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch is available at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-75327
GHSA-ppgw-cqj8-9qrg