{"id":"CVE-2022-40307","title":"An issue was discovered in the Linux kernel through 5.19.8","summary":"An issue was discovered in the Linux kernel through 5.19.8. drivers/firmware/efi/capsule-loader.c has a race condition with a resultant use-after-free.","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-362"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel <= 5.19.8","debian_linux = 10.0","debian_linux = 11.0"],"published":"2022-09-09","updated":"2026-10-14","sourceUpdated":"2026-10-14T18:17:05.303","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-40307","references":[{"url":"https://github.com/torvalds/linux/commit/9cb636b5f6a8cc6d1b50809ec8f8d33ae0c84c95","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2022/dsa-5257","label":"cve@mitre.org"},{"url":"https://github.com/torvalds/linux/commit/9cb636b5f6a8cc6d1b50809ec8f8d33ae0c84c95","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5257","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-831302.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00211,"epssPercentile":0.11214,"ingestedAt":"2026-10-14T18:47:39.270Z","slug":"CVE-2022-40307","body":"## Overview\n\nAn issue was discovered in the Linux kernel through 5.19.8. drivers/firmware/efi/capsule-loader.c has a race condition with a resultant use-after-free.\n\n## Affected\n\n- `linux_kernel <= 5.19.8`\n- `debian_linux = 10.0`\n- `debian_linux = 11.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}