{"id":"CVE-2023-53055","title":"fscrypt: destroy keyring after security_sb_delete()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfscrypt: destroy keyring after security_sb_delete()\n\nfscrypt_destroy_keyring() must be called after all potentially-encrypted\ninodes were evicted; otherwise it cannot s…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= e6f4fd85ef1ee6ab356bfbd64df28c1cb73aee7e < 992a3f3e8a0c92151dfdf65fc85567c865fd558a","Linux >= d7e7b9af104c7b389a0c21eb26532511bce4b510 < d77531fac6a1fd9f1db0195438ba5419d72b96c4","Linux >= d7e7b9af104c7b389a0c21eb26532511bce4b510 < 497ab5d9c7852dfedab2c9de75e41b60e54b7c5d","Linux >= d7e7b9af104c7b389a0c21eb26532511bce4b510 < ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a","Linux 391cceee6d435e616f68631e68f5b32d480b1e67","Linux 68d15d6558a386f46d815a6ac39edecad713a1bf","Linux >= 5.15.78 < 5.15.105","Linux >= 5.10.154 < 5.11","Linux >= 6.0.8 < 6.1","Linux 6.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:15:42.273186Z"},"published":"2025-05-02","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:20:57.118Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53055","references":[{"url":"https://git.kernel.org/stable/c/992a3f3e8a0c92151dfdf65fc85567c865fd558a"},{"url":"https://git.kernel.org/stable/c/d77531fac6a1fd9f1db0195438ba5419d72b96c4"},{"url":"https://git.kernel.org/stable/c/497ab5d9c7852dfedab2c9de75e41b60e54b7c5d"},{"url":"https://git.kernel.org/stable/c/ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a"}],"tags":["cve.org"],"epss":0.00202,"epssPercentile":0.10136,"ingestedAt":"2026-11-05T22:38:31.759Z","slug":"CVE-2023-53055","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfscrypt: destroy keyring after security_sb_delete()\n\nfscrypt_destroy_keyring() must be called after all potentially-encrypted\ninodes were evicted; otherwise it cannot safely destroy the keyring.\nSince inodes that are in-use by the Landlock LSM don't get evicted until\nsecurity_sb_delete(), this means that fscrypt_destroy_keyring() must be\ncalled *after* security_sb_delete().\n\nThis fixes a WARN_ON followed by a NULL dereference, only possible if\nLandlock was being used on encrypted files.\n\n## Affected\n\n- `Linux >= e6f4fd85ef1ee6ab356bfbd64df28c1cb73aee7e < 992a3f3e8a0c92151dfdf65fc85567c865fd558a`\n- `Linux >= d7e7b9af104c7b389a0c21eb26532511bce4b510 < d77531fac6a1fd9f1db0195438ba5419d72b96c4`\n- `Linux >= d7e7b9af104c7b389a0c21eb26532511bce4b510 < 497ab5d9c7852dfedab2c9de75e41b60e54b7c5d`\n- `Linux >= d7e7b9af104c7b389a0c21eb26532511bce4b510 < ccb820dc7d2236b1af0d54ae038a27b5b6d5ae5a`\n- `Linux 391cceee6d435e616f68631e68f5b32d480b1e67`\n- `Linux 68d15d6558a386f46d815a6ac39edecad713a1bf`\n- `Linux >= 5.15.78 < 5.15.105`\n- `Linux >= 5.10.154 < 5.11`\n- `Linux >= 6.0.8 < 6.1`\n- `Linux 6.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}