CVE-2023-53344 (GCVE-0-2023-53344)
Vulnerability from cvelistv5
Published
2025-09-17 14:56
Modified
2025-09-17 14:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write Syzkaller reported the following issue: ===================================================== BUG: KMSAN: uninit-value in aio_rw_done fs/aio.c:1520 [inline] BUG: KMSAN: uninit-value in aio_write+0x899/0x950 fs/aio.c:1600 aio_rw_done fs/aio.c:1520 [inline] aio_write+0x899/0x950 fs/aio.c:1600 io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019 __do_sys_io_submit fs/aio.c:2078 [inline] __se_sys_io_submit+0x293/0x770 fs/aio.c:2048 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook mm/slab.h:766 [inline] slab_alloc_node mm/slub.c:3452 [inline] __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491 __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0x11d/0x3b0 mm/slab_common.c:981 kmalloc_array include/linux/slab.h:636 [inline] bcm_tx_setup+0x80e/0x29d0 net/can/bcm.c:930 bcm_sendmsg+0x3a2/0xce0 net/can/bcm.c:1351 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] sock_write_iter+0x495/0x5e0 net/socket.c:1108 call_write_iter include/linux/fs.h:2189 [inline] aio_write+0x63a/0x950 fs/aio.c:1600 io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019 __do_sys_io_submit fs/aio.c:2078 [inline] __se_sys_io_submit+0x293/0x770 fs/aio.c:2048 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd CPU: 1 PID: 5034 Comm: syz-executor350 Not tainted 6.2.0-rc6-syzkaller-80422-geda666ff2276 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 ===================================================== We can follow the call chain and find that 'bcm_tx_setup' function calls 'memcpy_from_msg' to copy some content to the newly allocated frame of 'op->frames'. After that the 'len' field of copied structure being compared with some constant value (64 or 8). However, if 'memcpy_from_msg' returns an error, we will compare some uninitialized memory. This triggers 'uninit-value' issue. This patch will add 'memcpy_from_msg' possible errors processing to avoid uninit-value issue. Tested via syzkaller
References
Impacted products
Vendor Product Version
Linux Linux Version: 6f3b911d5f29b98752e5da86a295210c0c4f4e14
Version: 6f3b911d5f29b98752e5da86a295210c0c4f4e14
Version: 6f3b911d5f29b98752e5da86a295210c0c4f4e14
Version: 6f3b911d5f29b98752e5da86a295210c0c4f4e14
Version: 6f3b911d5f29b98752e5da86a295210c0c4f4e14
Version: 6f3b911d5f29b98752e5da86a295210c0c4f4e14
Version: 6f3b911d5f29b98752e5da86a295210c0c4f4e14
Version: 6f3b911d5f29b98752e5da86a295210c0c4f4e14
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/can/bcm.c"
          ],
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        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.312",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.280",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.240",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.312",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.280",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.240",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
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                {
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                  "versionEndExcluding": "5.10.177",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
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                {
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                  "versionEndExcluding": "6.2.10",
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                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write\n\nSyzkaller reported the following issue:\n\n=====================================================\nBUG: KMSAN: uninit-value in aio_rw_done fs/aio.c:1520 [inline]\nBUG: KMSAN: uninit-value in aio_write+0x899/0x950 fs/aio.c:1600\n aio_rw_done fs/aio.c:1520 [inline]\n aio_write+0x899/0x950 fs/aio.c:1600\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\n __do_sys_io_submit fs/aio.c:2078 [inline]\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nUninit was created at:\n slab_post_alloc_hook mm/slab.h:766 [inline]\n slab_alloc_node mm/slub.c:3452 [inline]\n __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491\n __do_kmalloc_node mm/slab_common.c:967 [inline]\n __kmalloc+0x11d/0x3b0 mm/slab_common.c:981\n kmalloc_array include/linux/slab.h:636 [inline]\n bcm_tx_setup+0x80e/0x29d0 net/can/bcm.c:930\n bcm_sendmsg+0x3a2/0xce0 net/can/bcm.c:1351\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg net/socket.c:734 [inline]\n sock_write_iter+0x495/0x5e0 net/socket.c:1108\n call_write_iter include/linux/fs.h:2189 [inline]\n aio_write+0x63a/0x950 fs/aio.c:1600\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\n __do_sys_io_submit fs/aio.c:2078 [inline]\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nCPU: 1 PID: 5034 Comm: syz-executor350 Not tainted 6.2.0-rc6-syzkaller-80422-geda666ff2276 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023\n=====================================================\n\nWe can follow the call chain and find that \u0027bcm_tx_setup\u0027 function\ncalls \u0027memcpy_from_msg\u0027 to copy some content to the newly allocated\nframe of \u0027op-\u003eframes\u0027. After that the \u0027len\u0027 field of copied structure\nbeing compared with some constant value (64 or 8). However, if\n\u0027memcpy_from_msg\u0027 returns an error, we will compare some uninitialized\nmemory. This triggers \u0027uninit-value\u0027 issue.\n\nThis patch will add \u0027memcpy_from_msg\u0027 possible errors processing to\navoid uninit-value issue.\n\nTested via syzkaller"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-17T14:56:37.024Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3fa0f1e0e31b1b73cdf59d4c36c7242e6ef821be"
        },
        {
          "url": "https://git.kernel.org/stable/c/618b15d09fed6126356101543451d49860db4388"
        },
        {
          "url": "https://git.kernel.org/stable/c/78bc7f0ab99458221224d3ab97199c0f8e6861f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab2a55907823f0bca56b6d03ea05e4071ba8535f"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf70e0eab64c625da84d9fdf4e84466b79418920"
        },
        {
          "url": "https://git.kernel.org/stable/c/c11dbc7705b3739974ac31a13f4ab81e61a5fb07"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e6ad51c709fa794e0ce26003c9c9cd944e3383a"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b4c99f7d9a57ecd644eda9b1fb0a1072414959f"
        }
      ],
      "title": "can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53344",
    "datePublished": "2025-09-17T14:56:37.024Z",
    "dateReserved": "2025-09-16T16:08:59.566Z",
    "dateUpdated": "2025-09-17T14:56:37.024Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53344\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-17T15:15:38.237\",\"lastModified\":\"2025-09-18T13:43:34.310\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write\\n\\nSyzkaller reported the following issue:\\n\\n=====================================================\\nBUG: KMSAN: uninit-value in aio_rw_done fs/aio.c:1520 [inline]\\nBUG: KMSAN: uninit-value in aio_write+0x899/0x950 fs/aio.c:1600\\n aio_rw_done fs/aio.c:1520 [inline]\\n aio_write+0x899/0x950 fs/aio.c:1600\\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\\n __do_sys_io_submit fs/aio.c:2078 [inline]\\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nUninit was created at:\\n slab_post_alloc_hook mm/slab.h:766 [inline]\\n slab_alloc_node mm/slub.c:3452 [inline]\\n __kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491\\n __do_kmalloc_node mm/slab_common.c:967 [inline]\\n __kmalloc+0x11d/0x3b0 mm/slab_common.c:981\\n kmalloc_array include/linux/slab.h:636 [inline]\\n bcm_tx_setup+0x80e/0x29d0 net/can/bcm.c:930\\n bcm_sendmsg+0x3a2/0xce0 net/can/bcm.c:1351\\n sock_sendmsg_nosec net/socket.c:714 [inline]\\n sock_sendmsg net/socket.c:734 [inline]\\n sock_write_iter+0x495/0x5e0 net/socket.c:1108\\n call_write_iter include/linux/fs.h:2189 [inline]\\n aio_write+0x63a/0x950 fs/aio.c:1600\\n io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019\\n __do_sys_io_submit fs/aio.c:2078 [inline]\\n __se_sys_io_submit+0x293/0x770 fs/aio.c:2048\\n __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nCPU: 1 PID: 5034 Comm: syz-executor350 Not tainted 6.2.0-rc6-syzkaller-80422-geda666ff2276 #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023\\n=====================================================\\n\\nWe can follow the call chain and find that \u0027bcm_tx_setup\u0027 function\\ncalls \u0027memcpy_from_msg\u0027 to copy some content to the newly allocated\\nframe of \u0027op-\u003eframes\u0027. After that the \u0027len\u0027 field of copied structure\\nbeing compared with some constant value (64 or 8). However, if\\n\u0027memcpy_from_msg\u0027 returns an error, we will compare some uninitialized\\nmemory. This triggers \u0027uninit-value\u0027 issue.\\n\\nThis patch will add \u0027memcpy_from_msg\u0027 possible errors processing to\\navoid uninit-value issue.\\n\\nTested via syzkaller\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2b4c99f7d9a57ecd644eda9b1fb0a1072414959f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2e6ad51c709fa794e0ce26003c9c9cd944e3383a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3fa0f1e0e31b1b73cdf59d4c36c7242e6ef821be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/618b15d09fed6126356101543451d49860db4388\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/78bc7f0ab99458221224d3ab97199c0f8e6861f1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ab2a55907823f0bca56b6d03ea05e4071ba8535f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bf70e0eab64c625da84d9fdf4e84466b79418920\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c11dbc7705b3739974ac31a13f4ab81e61a5fb07\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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