{"id":"CVE-2026-68149","revision":"7cbab0e75ee4484c86b9eb4d081fc366","records":[{"revision":"7cbab0e75ee4484c86b9eb4d081fc366","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68149","aliases":[],"title":"fs: preserve ACL_DONT_CACHE state in forget_cached_acl()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs: preserve ACL_DONT_CACHE state in forget_cached_acl()\n\nThe ACL_DONT_CACHE state is meant to be a constant state for the inode\nfor filesystems that want to opt out of posix acl caching.\n\nCommit facd61053cff1 (\"fuse: fixes after adapting to new posix acl api\")\nused this facility to opt out of posix acl caching for fuse inodes with\nfuse server that does not negotiate FUSE_POSIX_ACL (fc->posix_acl).\n\nThe commit also takes care to gate the forget_all_cached_acls() call in\nfuse_set_acl() on fc->posix_acl because there is no need for it, but\nthere are other placed in fuse code which call forget_all_cached_acls()\nunconditional to fc->posix_acl and those cause the loss of the\nACL_DONT_CACHE state.\n\nThis is not only a functional bug. Properly timed, a get_acl() from this\nfuse filesystem can return a stale cached value, as was observed in tests,\nbecause set_acl() does not invalidate the unintentional acl cache.\n\nWe could fix this in fuse, but it actually makes no sense for the vfs\nhelper forget_cached_acl() to invalidate the ACL_DONT_CACHE state, so\nlet it not do that to fix fuse and future users of ACL_DONT_CACHE.","state":0,"publishedAt":"2026-08-10T11:59:14.645+00:00","modifiedAt":"2026-10-19T20:58:54.165+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/posix_acl.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"facd61053cff100973921d4d45d47cf53c747ec6\",\n                            \"lessThan\": \"b98fad81f1202b0eb26aacf3ff4cc7a21ed3b5bf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"facd61053cff100973921d4d45d47cf53c747ec6\",\n                            \"lessThan\": \"834ddf899484a2f23129080e8773bc04f4691d07\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"facd61053cff100973921d4d45d47cf53c747ec6\",\n                            \"lessThan\": \"a019b074903b3ad0a9726087efd0e8291452023b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"facd61053cff100973921d4d45d47cf53c747ec6\",\n                            \"lessThan\": \"ca03a7984a34f48085fd013e0d2cf4e6420b4acf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"facd61053cff100973921d4d45d47cf53c747ec6\",\n                            \"lessThan\": \"4b9a5458d02e214ef2b384124ca626e3e381d778\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/posix_acl.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.148\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.101\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.42\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.6\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","score":8.4,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/b98fad81f1202b0eb26aacf3ff4cc7a21ed3b5bf","https://git.kernel.org/stable/c/834ddf899484a2f23129080e8773bc04f4691d07","https://git.kernel.org/stable/c/a019b074903b3ad0a9726087efd0e8291452023b","https://git.kernel.org/stable/c/ca03a7984a34f48085fd013e0d2cf4e6420b4acf","https://git.kernel.org/stable/c/4b9a5458d02e214ef2b384124ca626e3e381d778"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68149","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68149","identifiers":["CVE-2026-68149"]},"retained":false,"historicalAffected":[]}],"coverage":[]}