CVE-2023-53468 (GCVE-0-2023-53468)
Vulnerability from cvelistv5
Published
2025-10-01 11:42
Modified
2025-10-01 11:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ubifs: Fix memory leak in alloc_wbufs() kmemleak reported a sequence of memory leaks, and show them as following: unreferenced object 0xffff8881575f8400 (size 1024): comm "mount", pid 19625, jiffies 4297119604 (age 20.383s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff8176cecd>] __kmalloc+0x4d/0x150 [<ffffffffa0406b2b>] ubifs_mount+0x307b/0x7170 [ubifs] [<ffffffff819fa8fd>] legacy_get_tree+0xed/0x1d0 [<ffffffff81936f2d>] vfs_get_tree+0x7d/0x230 [<ffffffff819b2bd4>] path_mount+0xdd4/0x17b0 [<ffffffff819b37aa>] __x64_sys_mount+0x1fa/0x270 [<ffffffff83c14295>] do_syscall_64+0x35/0x80 [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 unreferenced object 0xffff8881798a6e00 (size 512): comm "mount", pid 19677, jiffies 4297121912 (age 37.816s) hex dump (first 32 bytes): 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk backtrace: [<ffffffff8176cecd>] __kmalloc+0x4d/0x150 [<ffffffffa0418342>] ubifs_wbuf_init+0x52/0x480 [ubifs] [<ffffffffa0406ca5>] ubifs_mount+0x31f5/0x7170 [ubifs] [<ffffffff819fa8fd>] legacy_get_tree+0xed/0x1d0 [<ffffffff81936f2d>] vfs_get_tree+0x7d/0x230 [<ffffffff819b2bd4>] path_mount+0xdd4/0x17b0 [<ffffffff819b37aa>] __x64_sys_mount+0x1fa/0x270 [<ffffffff83c14295>] do_syscall_64+0x35/0x80 [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 The problem is that the ubifs_wbuf_init() returns an error in the loop which in the alloc_wbufs(), then the wbuf->buf and wbuf->inodes that were successfully alloced before are not freed. Fix it by adding error hanging path in alloc_wbufs() which frees the memory alloced before when ubifs_wbuf_init() returns an error.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d
Version: 1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d
Version: 1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d
Version: 1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d
Version: 1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d
Version: 1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ubifs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
              "versionType": "git"
            },
            {
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              "versionType": "git"
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              "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
              "versionType": "git"
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              "status": "affected",
              "version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ubifs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.27"
            },
            {
              "lessThan": "2.6.27",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.235",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.173",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.100",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.235",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.173",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.100",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionEndExcluding": "6.3",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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      ],
      "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      [\u003cffffffff8176cecd\u003e] __kmalloc+0x4d/0x150\n      [\u003cffffffffa0406b2b\u003e] ubifs_mount+0x307b/0x7170 [ubifs]\n      [\u003cffffffff819fa8fd\u003e] legacy_get_tree+0xed/0x1d0\n      [\u003cffffffff81936f2d\u003e] vfs_get_tree+0x7d/0x230\n      [\u003cffffffff819b2bd4\u003e] path_mount+0xdd4/0x17b0\n      [\u003cffffffff819b37aa\u003e] __x64_sys_mount+0x1fa/0x270\n      [\u003cffffffff83c14295\u003e] do_syscall_64+0x35/0x80\n      [\u003cffffffff83e0006a\u003e] 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      [\u003cffffffff8176cecd\u003e] __kmalloc+0x4d/0x150\n      [\u003cffffffffa0418342\u003e] ubifs_wbuf_init+0x52/0x480 [ubifs]\n      [\u003cffffffffa0406ca5\u003e] ubifs_mount+0x31f5/0x7170 [ubifs]\n      [\u003cffffffff819fa8fd\u003e] legacy_get_tree+0xed/0x1d0\n      [\u003cffffffff81936f2d\u003e] vfs_get_tree+0x7d/0x230\n      [\u003cffffffff819b2bd4\u003e] path_mount+0xdd4/0x17b0\n      [\u003cffffffff819b37aa\u003e] __x64_sys_mount+0x1fa/0x270\n      [\u003cffffffff83c14295\u003e] do_syscall_64+0x35/0x80\n      [\u003cffffffff83e0006a\u003e] 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-\u003ebuf and wbuf-\u003einodes\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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-01T11:42:38.673Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
        }
      ],
      "title": "ubifs: Fix memory leak in alloc_wbufs()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53468",
    "datePublished": "2025-10-01T11:42:38.673Z",
    "dateReserved": "2025-10-01T11:39:39.400Z",
    "dateUpdated": "2025-10-01T11:42:38.673Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53468\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-01T12:15:48.830\",\"lastModified\":\"2025-10-02T19:12:17.160\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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      [\u003cffffffff8176cecd\u003e] __kmalloc+0x4d/0x150\\n      [\u003cffffffffa0406b2b\u003e] ubifs_mount+0x307b/0x7170 [ubifs]\\n      [\u003cffffffff819fa8fd\u003e] legacy_get_tree+0xed/0x1d0\\n      [\u003cffffffff81936f2d\u003e] vfs_get_tree+0x7d/0x230\\n      [\u003cffffffff819b2bd4\u003e] path_mount+0xdd4/0x17b0\\n      [\u003cffffffff819b37aa\u003e] __x64_sys_mount+0x1fa/0x270\\n      [\u003cffffffff83c14295\u003e] do_syscall_64+0x35/0x80\\n      [\u003cffffffff83e0006a\u003e] 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      [\u003cffffffff8176cecd\u003e] __kmalloc+0x4d/0x150\\n      [\u003cffffffffa0418342\u003e] ubifs_wbuf_init+0x52/0x480 [ubifs]\\n      [\u003cffffffffa0406ca5\u003e] ubifs_mount+0x31f5/0x7170 [ubifs]\\n      [\u003cffffffff819fa8fd\u003e] legacy_get_tree+0xed/0x1d0\\n      [\u003cffffffff81936f2d\u003e] vfs_get_tree+0x7d/0x230\\n      [\u003cffffffff819b2bd4\u003e] path_mount+0xdd4/0x17b0\\n      [\u003cffffffff819b37aa\u003e] __x64_sys_mount+0x1fa/0x270\\n      [\u003cffffffff83c14295\u003e] do_syscall_64+0x35/0x80\\n      [\u003cffffffff83e0006a\u003e] 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-\u003ebuf and wbuf-\u003einodes\\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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1f206002c6bc302bface871ef3f72c0bbcaa931c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/26ec45f1c504e15268383019df139d7983f1e67f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3e29634eb56e6547272fe4e568f63421f8b3b9fa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a1ff3c5d04b9079b4f768d9a71b51c4af578dd2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bf50229494f0443b3f08427d7df63e5a7e2a796a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e11f36d3bc4d23f620754a948fe7b82b63dcb185\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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