{"id":"CVE-2025-71072","revision":"300feef5723c473e8ee7f9e4dfca6081","records":[{"revision":"300feef5723c473e8ee7f9e4dfca6081","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-71072","aliases":[],"title":"shmem: fix recovery on rename failures","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nshmem: fix recovery on rename failures\n\nmaple_tree insertions can fail if we are seriously short on memory;\nsimple_offset_rename() does not recover well if it runs into that.\nThe same goes for simple_offset_rename_exchange().\n\nMoreover, shmem_whiteout() expects that if it succeeds, the caller will\nprogress to d_move(), i.e. that shmem_rename2() won't fail past the\nsuccessful call of shmem_whiteout().\n\nNot hard to fix, fortunately - mtree_store() can't fail if the index we\nare trying to store into is already present in the tree as a singleton.\n\nFor simple_offset_rename_exchange() that's enough - we just need to be\ncareful about the order of operations.\n\nFor simple_offset_rename() solution is to preinsert the target into the\ntree for new_dir; the rest can be done without any potentially failing\noperations.\n\nThat preinsertion has to be done in shmem_rename2() rather than in\nsimple_offset_rename() itself - otherwise we'd need to deal with the\npossibility of failure after successful shmem_whiteout().","state":0,"publishedAt":"2026-01-13T15:31:26.089+00:00","modifiedAt":"2026-10-21T12:38:31.063+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/libfs.c\",\n                        \"include/linux/fs.h\",\n                        \"mm/shmem.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a2e459555c5f9da3e619b7e47a63f98574dc75f1\",\n                            \"lessThan\": \"8fdbc6f9a994eb327868a4aa74a58953f31a2d0f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a2e459555c5f9da3e619b7e47a63f98574dc75f1\",\n                            \"lessThan\": \"4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a2e459555c5f9da3e619b7e47a63f98574dc75f1\",\n                            \"lessThan\": \"4642686699a46718d7f2fb5acd1e9d866a9d9cca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a2e459555c5f9da3e619b7e47a63f98574dc75f1\",\n                            \"lessThan\": \"e1b4c6a58304fd490124cc2b454d80edc786665c\",\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/libfs.c\",\n                        \"include/linux/fs.h\",\n                        \"mm/shmem.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.64\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.3\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","score":8.2,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/8fdbc6f9a994eb327868a4aa74a58953f31a2d0f","https://git.kernel.org/stable/c/4b0fe71fb3965d0db83cdfc2f4fe0b3227d70113","https://git.kernel.org/stable/c/4642686699a46718d7f2fb5acd1e9d866a9d9cca","https://git.kernel.org/stable/c/e1b4c6a58304fd490124cc2b454d80edc786665c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-71072","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-71072","identifiers":["CVE-2025-71072"]},"retained":false,"historicalAffected":[]}],"coverage":[]}