EUVD-2026-68104
GHSA-qpg9-jg2w-m84x
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local vector because su-exec must be directly invoked; PR:L because low-privilege local access is required; full C/I/A impact upon successful root escalation; scope unchanged as privilege escalation occurs within the same authorization boundary.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
su-exec through 0.3 fails to validate numeric user and group identifiers parsed with strtol before assigning to uid_t and gid_t, allowing truncation of out-of-range values to zero. Attackers can supply large numeric identifiers that truncate to root's identifier, causing su-exec to execute target programs with root privileges instead of intended unprivileged accounts.
AnalysisAI
Privilege escalation in su-exec through version 0.3 allows local attackers with low-privilege access to execute arbitrary programs as root by supplying crafted oversized numeric user or group identifiers. The root cause is an unchecked integer truncation: strtol() returns a 64-bit long on modern Linux, but su-exec assigns the result directly to uid_t and gid_t (32-bit unsigned integers) without range validation - values like 4294967296 (2^32) silently truncate to UID/GID 0, the root account. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to have at least low-privilege local code execution on the target system (PR:L per the CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) scores 8.5 and accurately characterizes a locally exploitable, low-complexity privilege escalation requiring only low initial privileges - no special configuration, no user interaction, and no race condition. … 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 has been identified at time of analysis; administrators should monitor the upstream repository at https://github.com/ncopa/su-exec for a patched release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a comprehensive inventory of all production systems, containers, and images using su-exec to identify affected assets and establish baseline exposure metrics. …
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Same weakness CWE-681 – Incorrect Conversion between Numeric Types
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External POC / Exploit Code
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