{"id":"CVE-2026-122192","aliases":["EUVD-2026-117056","GHSA-48ww-rqpp-2mgm"],"status":"published","title":"Guest access to Firecracker process memory after a failed memory discard","description":"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.\n\n\n\nTo remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00157,"percentile":0.04887,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-390","CWE-825"],"published":"2026-11-04T19:35:51Z","modified":"2026-11-05T10:46:27Z","products":[{"vendor":"aws","product":"firecracker"}],"references":[{"url":"https://github.com/firecracker-microvm/firecracker/releases/tag/v1.16.2","tags":["release-notes","patch","fix"]},{"url":"https://github.com/firecracker-microvm/firecracker/releases/tag/v1.17.0","tags":["release-notes","patch","fix"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-169-aws/","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/122xxx/CVE-2026-122192.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-122192","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-122192","title":"Guest access to Firecracker process memory after a failed memory discard","description":"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.\n\n\n\nTo remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.","status":"published","published":"2026-11-04T19:35:51.555Z","modified":"2026-11-09T21:06:11.716Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-390","CWE-825"],"updated_at":"2026-11-09T22:35:08.46461Z"}],"euvd":[{"id":"EUVD-2026-117056","description":"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.\n\n\n\nTo remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.","status":"published","published":"2026-11-04T19:35:51Z","modified":"2026-11-09T21:06:11Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-09T22:18:21.971974Z"}],"nvd":[{"id":"CVE-2026-122192","description":"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.\n\n\n\nTo remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.","status":"published","published":"2026-11-04T20:19:12.21Z","modified":"2026-11-09T22:18:34.857Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/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","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-390","CWE-825"],"updated_at":"2026-11-09T23:16:04.854042Z"}],"osv":[{"id":"CVE-2026-122192","title":"Guest access to Firecracker process memory after a failed memory discard","description":"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.\n\n\n\nTo remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.","status":"published","published":"2026-11-04T19:35:51.555Z","modified":"2026-11-11T02:30:24.720277656Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-390","CWE-825"],"updated_at":"2026-11-10T10:57:25.458985Z"}]}}