EUVD-2026-71619
GHSA-4p2r-rwww-hrf2
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 low-privileged user escalates to root via shell injection in the hotpatch daemon; full C/I/A impact on the local system, no scope change.
Primary rating from Vendor (AMZN).
CVSS VectorVendor: AMZN
Lifecycle Timeline
2DescriptionCVE.org
An OS command injection issue in the log4j-cve-2021-44228-hotpatch package in Amazon Linux before 1.3-9 might allow a local user to execute arbitrary commands with root privileges via a Java process whose executable path contains embedded newline characters.
AnalysisAI
Local privilege escalation to root in Amazon's log4j-cve-2021-44228-hotpatch package (Amazon Linux before version 1.3-9) stems from an OS command injection flaw triggered when the hotpatch daemon processes a Java executable whose filesystem path contains embedded newline characters. A low-privileged local user can craft such a path and launch a Java process, causing the unpatched daemon to pass the unsanitized path into a shell command and execute the injected content with root privileges. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local shell account (PR:L) on an Amazon Linux 2 system running the log4j-cve-2021-44228-hotpatch daemon at a version prior to 1.3-9. … 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) accurately reflects this as a low-complexity local privilege escalation - no special attack configuration is required beyond having a local shell account. … 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 | Update the log4j-cve-2021-44228-hotpatch package to version 1.3-9 or later using `yum update log4j-cve-2021-44228-hotpatch` on affected Amazon Linux 2 systems, as documented in ALAS2-2026-3784 (https://alas.aws.amazon.com/AL2/ALAS2-2026-3784.html) and the AWS security bulletin (https://aws.amazon.com/security/security-bulletins/2026-098-aws/). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Amazon Linux systems running log4j-cve-2021-44228-hotpatch versions prior to 1.3-9 using your configuration management or package tracking systems. …
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Same weakness CWE-78 – OS Command Injection
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External POC / Exploit Code
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