{"id":"CVE-2024-26901","revision":"d06f1daf986a44d58471c39cf3344889","records":[{"revision":"d06f1daf986a44d58471c39cf3344889","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-26901","aliases":[],"title":"do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndo_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak\n\nsyzbot identified a kernel information leak vulnerability in\ndo_sys_name_to_handle() and issued the following report [1].\n\n[1]\n\"BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\nBUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x100 lib/usercopy.c:40\n instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n _copy_to_user+0xbc/0x100 lib/usercopy.c:40\n copy_to_user include/linux/uaccess.h:191 [inline]\n do_sys_name_to_handle fs/fhandle.c:73 [inline]\n __do_sys_name_to_handle_at fs/fhandle.c:112 [inline]\n __se_sys_name_to_handle_at+0x949/0xb10 fs/fhandle.c:94\n __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94\n ...\n\nUninit was created at:\n slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768\n slab_alloc_node mm/slub.c:3478 [inline]\n __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517\n __do_kmalloc_node mm/slab_common.c:1006 [inline]\n __kmalloc+0x121/0x3c0 mm/slab_common.c:1020\n kmalloc include/linux/slab.h:604 [inline]\n do_sys_name_to_handle fs/fhandle.c:39 [inline]\n __do_sys_name_to_handle_at fs/fhandle.c:112 [inline]\n __se_sys_name_to_handle_at+0x441/0xb10 fs/fhandle.c:94\n __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94\n ...\n\nBytes 18-19 of 20 are uninitialized\nMemory access of size 20 starts at ffff888128a46380\nData copied to user address 0000000020000240\"\n\nPer Chuck Lever's suggestion, use kzalloc() instead of kmalloc() to\nsolve the problem.","state":0,"publishedAt":"2024-04-17T10:27:50.374+00:00","modifiedAt":"2026-10-15T00:39:17.331+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/fhandle.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"cde76b3af247f615447bcfecf610bb76c3529126\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"423b6bdf19bbc5e1f7e7461045099917378f7e71\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"e6450d5e46a737a008b4885aa223486113bf0ad6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"c1362eae861db28b1608b9dc23e49634fe87b63b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"cba138f1ef37ec6f961baeab62f312dedc7cf730\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"bf9ec1b24ab4e94345aa1c60811dd329f069c38b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"990d6c2d7aee921e3bce22b2d6a750fd552262be\",\n                            \"lessThan\": \"3948abaa4e2be938ccdfc289385a27342fb13d43\",\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/fhandle.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.39\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.39\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"4.19.311\",\n                            \"lessThanOrEqual\": \"4.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.4.273\",\n                            \"lessThanOrEqual\": \"5.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.214\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.153\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.83\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.23\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.7.11\",\n                            \"lessThanOrEqual\": \"6.7.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.8.2\",\n                            \"lessThanOrEqual\": \"6.8.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.9\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1","https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b","https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126","https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71","https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6","https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b","https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730","https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b","https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-26901","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-26901","identifiers":["CVE-2024-26901"]},"retained":false,"historicalAffected":[]}],"coverage":[]}