CVE-2026-122192

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{"bugzilla": {"description": "firecracker: firecracker: Unauthorized host memory access via failed memory remap", "id": "2567842", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567842"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["Improper handling of a failed memory remap in Firecracker versions 0.23.0 through 1.16.1 might allow a guest user with root privileges to read or modify Firecracker VMM process memory via balloon or virtio-mem discard requests on microVMs restored from a snapshot with the File memory backend, if the host fails to create the replacement mapping.\nTo remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.", "A flaw was found in Firecracker. Improper handling of failed memory remapping can allow a privileged user inside a guest virtual machine to read or modify the host's Virtual Machine Monitor (VMM) process memory. This vulnerability can be triggered through memory ballooning or discard operations on virtual machines restored from a file-backed snapshot if the host fails to establish a replacement memory mapping. Successful exploitation compromises the host process, potentially leading to unauthorized data disclosure or arbitrary code execution."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-122192", "public_date": "2026-11-04T19:35:51Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-122192\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-122192\nhttps://aws.amazon.com/security/security-bulletins/2026-169-aws/\nhttps://github.com/firecracker-microvm/firecracker/releases/tag/v1.16.2\nhttps://github.com/firecracker-microvm/firecracker/releases/tag/v1.17.0\nhttps://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm"], "statement": "This vulnerability is rated as Important because a privileged guest user can break isolation boundaries to access host memory, though exploitation requires specific snapshot configurations and host mapping failures. Firecracker is not shipped or supported in Red Hat products, including Red Hat Enterprise Linux and OpenShift Virtualization. Consequently, standard Red Hat enterprise environments are not exposed to this flaw.", "threat_severity": "Important"}

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