CVE-2026-95702

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{"bugzilla": {"description": "gvisor.dev/gvisor: gVisor: Arbitrary code execution via use-after-free in VFS", "id": "2548662", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2548662"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to achieve code execution in the host sentry process by double-freeing the backing MemoryFile from an in-sandbox overlay filesystem. The sentry process remains confined by host-level Linux seccomp and namespace boundaries.", "A flaw was found in Google gVisor's Virtual File System (VFS). A local attacker with standard container privileges can exploit this vulnerability to achieve arbitrary code execution within the host sentry process. By improperly releasing a backing memory file multiple times from an in-sandbox overlay filesystem, the attacker triggers a use-after-free memory corruption condition. While code execution occurs in the sentry process, the process remains restricted by host-level security filters and namespace boundaries."], "name": "CVE-2026-95702", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "gvisor-tap-vsock", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "container-tools:rhel8/podman", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "gvisor-tap-vsock", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "podman", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "podman", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-09T14:44:35Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-95702\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-95702\nhttps://github.com/google/gvisor/commit/25c75149bc0eeaa6a3a49b9bbe3473588b2af6df\nhttps://github.com/google/gvisor/commit/90bc4fc36fe442257a06ba15df00371561c183ed\nhttps://github.com/google/gvisor/commit/e4efb89c787ef15b09e68d561f1303380e1d5a77"], "threat_severity": "Important"}

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