{"id":"CVE-2021-36710","aliases":["EUVD-2021-23305","GHSA-cgmv-c2qg-xxqx"],"status":"published","title":"ToaruOS 1.99.2 is affected by incorrect access control via the kernel. Improper MMU management...","description":"ToaruOS 1.99.2 is affected by incorrect access control via the kernel. Improper MMU management and having a low GDT address allows it to be mapped in userland. A call gate can then be written to escalate to CPL 0.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0035,"percentile":0.28817,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269","CWE-668"],"published":"2022-06-08T14:43:46Z","modified":"2026-06-17T03:59:01Z","products":[{"vendor":"toaruos","product":"toaruos"}],"references":[{"url":"https://github.com/mehsauce/kowasuos/blob/master/exploits/kowasu-sysfunc-strikes-back.c","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36710"},{"url":"https://github.com/advisories/GHSA-cgmv-c2qg-xxqx"}],"sources":{"cve":[{"id":"CVE-2021-36710","description":"ToaruOS 1.99.2 is affected by incorrect access control via the kernel. Improper MMU management and having a low GDT address allows it to be mapped in userland. A call gate can then be written to escalate to CPL 0.","status":"published","published":"2022-06-08T14:43:46Z","modified":"2024-08-04T01:01:58.687Z","updated_at":"2026-11-02T14:33:05.989686Z"}],"euvd":[{"id":"EUVD-2021-23305","description":"ToaruOS 1.99.2 is affected by incorrect access control via the kernel. Improper MMU management and having a low GDT address allows it to be mapped in userland. A call gate can then be written to escalate to CPL 0.","status":"published","published":"2022-06-08T14:43:46Z","modified":"2024-08-04T01:01:58Z","updated_at":"2026-11-03T03:24:29.329171Z"}],"ghsa":[{"id":"GHSA-cgmv-c2qg-xxqx","title":"ToaruOS 1.99.2 is affected by incorrect access control via the kernel. Improper MMU management...","description":"ToaruOS 1.99.2 is affected by incorrect access control via the kernel. Improper MMU management and having a low GDT address allows it to be mapped in userland. A call gate can then be written to escalate to CPL 0.","status":"published","published":"2022-06-09T00:00:21Z","modified":"2023-01-27T05:03:47Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:42:19.36916Z"}],"nvd":[{"id":"CVE-2021-36710","description":"ToaruOS 1.99.2 is affected by incorrect access control via the kernel. Improper MMU management and having a low GDT address allows it to be mapped in userland. A call gate can then be written to escalate to CPL 0.","status":"published","published":"2022-06-08T15:15:07.877Z","modified":"2026-06-17T03:59:01.957Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-668"],"updated_at":"2026-11-02T14:07:06.501652Z"}]}}