{"id":"UBUNTU-CVE-2026-95702","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.","modified":"2026-10-14T03:23:48.019381783Z","published":"2026-10-13T00:00:00Z","upstream":["CVE-2026-95702"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-95702"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-95702"},{"type":"REPORT","url":"https://github.com/google/gvisor/commit/25c75149bc0eeaa6a3a49b9bbe3473588b2af6df"},{"type":"REPORT","url":"https://github.com/google/gvisor/commit/90bc4fc36fe442257a06ba15df00371561c183ed"},{"type":"REPORT","url":"https://github.com/google/gvisor/commit/e4efb89c787ef15b09e68d561f1303380e1d5a77"}],"affected":[{"package":{"name":"golang-gvisor-gvisor","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/golang-gvisor-gvisor?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0~20230807.0-4build1","0.0~20230807.0-4ubuntu0.24.04.1","0.0~20230807.0-4ubuntu0.24.04.2","0.0~20230807.0-4ubuntu0.24.04.3"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-gvisor-gvisor-dev","binary_version":"0.0~20230807.0-4ubuntu0.24.04.3"},{"binary_version":"0.0~20230807.0-4ubuntu0.24.04.3","binary_name":"runsc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95702.json"}},{"package":{"name":"golang-gvisor-gvisor","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/golang-gvisor-gvisor?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0~20240729.0-4","0.0~20240729.0-5","0.0~20240729.0-7"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-gvisor-gvisor-dev","binary_version":"0.0~20240729.0-7"},{"binary_name":"runsc","binary_version":"0.0~20240729.0-7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95702.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"},{"type":"Ubuntu","score":"medium"}]}