{"cve":"CVE-2023-53468","nvd":{"published":"2025-10-01T12:15:48.830","modified":"2026-06-17T06:45:24.653","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/1f206002c6bc302bface871ef3f72c0bbcaa931c","https://git.kernel.org/stable/c/26ec45f1c504e15268383019df139d7983f1e67f","https://git.kernel.org/stable/c/3e29634eb56e6547272fe4e568f63421f8b3b9fa","https://git.kernel.org/stable/c/4a1ff3c5d04b9079b4f768d9a71b51c4af578dd2","https://git.kernel.org/stable/c/bf50229494f0443b3f08427d7df63e5a7e2a796a"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:11:26.888974865+00:00"},"epss":{"cve":"CVE-2023-53468","score":0.0016,"percentile":0.05117,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}