{"schema_version":"1.9.0","id":"CVE-2023-53468","published":"2025-10-01T11:42:38.673Z","modified":"2026-08-12T03:51:18.564991169Z","related":["SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3761-1"],"summary":"ubifs: Fix memory leak in alloc_wbufs()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nubifs: Fix memory leak in alloc_wbufs()\n\nkmemleak reported a sequence of memory leaks, and show them as following:\n\n  unreferenced object 0xffff8881575f8400 (size 1024):\n    comm \"mount\", pid 19625, jiffies 4297119604 (age 20.383s)\n    hex dump (first 32 bytes):\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace:\n      [<ffffffff8176cecd>] __kmalloc+0x4d/0x150\n      [<ffffffffa0406b2b>] ubifs_mount+0x307b/0x7170 [ubifs]\n      [<ffffffff819fa8fd>] legacy_get_tree+0xed/0x1d0\n      [<ffffffff81936f2d>] vfs_get_tree+0x7d/0x230\n      [<ffffffff819b2bd4>] path_mount+0xdd4/0x17b0\n      [<ffffffff819b37aa>] __x64_sys_mount+0x1fa/0x270\n      [<ffffffff83c14295>] do_syscall_64+0x35/0x80\n      [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\n  unreferenced object 0xffff8881798a6e00 (size 512):\n    comm \"mount\", pid 19677, jiffies 4297121912 (age 37.816s)\n    hex dump (first 32 bytes):\n      6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk\n      6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk\n    backtrace:\n      [<ffffffff8176cecd>] __kmalloc+0x4d/0x150\n      [<ffffffffa0418342>] ubifs_wbuf_init+0x52/0x480 [ubifs]\n      [<ffffffffa0406ca5>] ubifs_mount+0x31f5/0x7170 [ubifs]\n      [<ffffffff819fa8fd>] legacy_get_tree+0xed/0x1d0\n      [<ffffffff81936f2d>] vfs_get_tree+0x7d/0x230\n      [<ffffffff819b2bd4>] path_mount+0xdd4/0x17b0\n      [<ffffffff819b37aa>] __x64_sys_mount+0x1fa/0x270\n      [<ffffffff83c14295>] do_syscall_64+0x35/0x80\n      [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe problem is that the ubifs_wbuf_init() returns an error in the\nloop which in the alloc_wbufs(), then the wbuf->buf and wbuf->inodes\nthat were successfully alloced before are not freed.\n\nFix it by adding error hanging path in alloc_wbufs() which frees\nthe memory alloced before when ubifs_wbuf_init() returns an error.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d"},{"fixed":"1f206002c6bc302bface871ef3f72c0bbcaa931c"},{"fixed":"bf50229494f0443b3f08427d7df63e5a7e2a796a"},{"fixed":"3e29634eb56e6547272fe4e568f63421f8b3b9fa"},{"fixed":"26ec45f1c504e15268383019df139d7983f1e67f"},{"fixed":"e11f36d3bc4d23f620754a948fe7b82b63dcb185"},{"fixed":"4a1ff3c5d04b9079b4f768d9a71b51c4af578dd2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53468.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.27"},{"fixed":"5.4.235"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.173"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.100"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.18"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53468.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1f206002c6bc302bface871ef3f72c0bbcaa931c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/26ec45f1c504e15268383019df139d7983f1e67f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3e29634eb56e6547272fe4e568f63421f8b3b9fa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4a1ff3c5d04b9079b4f768d9a71b51c4af578dd2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bf50229494f0443b3f08427d7df63e5a7e2a796a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e11f36d3bc4d23f620754a948fe7b82b63dcb185"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53468.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53468"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53468.json"}}