{"id":"CVE-2023-53468","state":"PUBLISHED","title":"ubifs: Fix memory leak in alloc_wbufs()","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.","publishedAt":"2025-10-01T11:42:38.673Z","updatedAt":"2026-05-11T19:45:35.279Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"1f206002c6bc302bface871ef3f72c0bbcaa931c","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"bf50229494f0443b3f08427d7df63e5a7e2a796a","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"3e29634eb56e6547272fe4e568f63421f8b3b9fa","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"26ec45f1c504e15268383019df139d7983f1e67f","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"e11f36d3bc4d23f620754a948fe7b82b63dcb185","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"4a1ff3c5d04b9079b4f768d9a71b51c4af578dd2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ubifs/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.27","versionType":"semver"},{"version":"5.4.235","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.173","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.100","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.18","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.5","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ubifs/super.c"]}],"references":["https://git.kernel.org/stable/c/1f206002c6bc302bface871ef3f72c0bbcaa931c","https://git.kernel.org/stable/c/bf50229494f0443b3f08427d7df63e5a7e2a796a","https://git.kernel.org/stable/c/3e29634eb56e6547272fe4e568f63421f8b3b9fa","https://git.kernel.org/stable/c/26ec45f1c504e15268383019df139d7983f1e67f","https://git.kernel.org/stable/c/e11f36d3bc4d23f620754a948fe7b82b63dcb185","https://git.kernel.org/stable/c/4a1ff3c5d04b9079b4f768d9a71b51c4af578dd2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53468.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53468","state":"PUBLISHED","datePublished":"2025-10-01T11:42:38.673Z","dateUpdated":"2026-05-11T19:45:35.279Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-10-01T11:39:39.400Z"},"containers":{"cna":{"title":"ubifs: Fix memory leak in alloc_wbufs()","descriptions":[{"lang":"en","value":"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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"1f206002c6bc302bface871ef3f72c0bbcaa931c","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"bf50229494f0443b3f08427d7df63e5a7e2a796a","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"3e29634eb56e6547272fe4e568f63421f8b3b9fa","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"26ec45f1c504e15268383019df139d7983f1e67f","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"e11f36d3bc4d23f620754a948fe7b82b63dcb185","versionType":"git"},{"version":"1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d","status":"affected","lessThan":"4a1ff3c5d04b9079b4f768d9a71b51c4af578dd2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ubifs/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.27","versionType":"semver"},{"version":"5.4.235","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.173","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.100","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.18","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2.5","status":"unaffected","lessThanOrEqual":"6.2.*","versionType":"semver"},{"version":"6.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ubifs/super.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1f206002c6bc302bface871ef3f72c0bbcaa931c"},{"url":"https://git.kernel.org/stable/c/bf50229494f0443b3f08427d7df63e5a7e2a796a"},{"url":"https://git.kernel.org/stable/c/3e29634eb56e6547272fe4e568f63421f8b3b9fa"},{"url":"https://git.kernel.org/stable/c/26ec45f1c504e15268383019df139d7983f1e67f"},{"url":"https://git.kernel.org/stable/c/e11f36d3bc4d23f620754a948fe7b82b63dcb185"},{"url":"https://git.kernel.org/stable/c/4a1ff3c5d04b9079b4f768d9a71b51c4af578dd2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:45:35.279Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.4.235"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.10.173"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.15.100"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.1.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}