CVE-2026-53382 (GCVE-0-2026-53382)
Vulnerability from cvelistv5
Published
2026-07-19 11:59
Modified
2026-08-17 04:50
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: vidtv: fix NULL pointer dereference in vidtv_mux_push_si syzbot reported a general protection fault in vidtv_psi_ts_psi_write_into [1]. vidtv_mux_get_pid_ctx() can return NULL, but vidtv_mux_push_si() does not check for this before dereferencing the returned pointer to access the continuity counter. This leads to a general protection fault when accessing a near-NULL address. The root cause is that vidtv_mux_pid_ctx_init() does not check the return value of vidtv_mux_create_pid_ctx_once() for PMT section PIDs. If the allocation fails, the PID context is never created, but init returns success. The subsequent vidtv_mux_push_si() call then gets NULL from vidtv_mux_get_pid_ctx() and crashes. Fix both the root cause (add error check in vidtv_mux_pid_ctx_init for PMT PIDs) and add defensive NULL checks in vidtv_mux_push_si for all vidtv_mux_get_pid_ctx() calls. [1] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] Workqueue: events vidtv_mux_tick RIP: 0010:vidtv_psi_ts_psi_write_into+0x54a/0xbc0 drivers/media/test-drivers/vidtv/vidtv_psi.c:197 Call Trace: <TASK> vidtv_psi_table_header_write_into drivers/media/test-drivers/vidtv/vidtv_psi.c:799 [inline] vidtv_psi_pmt_write_into+0x3b2/0xa70 drivers/media/test-drivers/vidtv/vidtv_psi.c:1231 vidtv_mux_push_si+0x932/0xe80 drivers/media/test-drivers/vidtv/vidtv_mux.c:196 vidtv_mux_tick+0xe9b/0x1480 drivers/media/test-drivers/vidtv/vidtv_mux.c:408
References
Impacted products
Vendor Product Version
Linux Linux Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
Version: f90cf6079bf67988f8b1ad1ade70fc89d0080905
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{
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          "programFiles": [
            "drivers/media/test-drivers/vidtv/vidtv_mux.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vidtv: fix NULL pointer dereference in vidtv_mux_push_si\n\nsyzbot reported a general protection fault in\nvidtv_psi_ts_psi_write_into [1].\n\nvidtv_mux_get_pid_ctx() can return NULL, but vidtv_mux_push_si() does\nnot check for this before dereferencing the returned pointer to access\nthe continuity counter. This leads to a general protection fault when\naccessing a near-NULL address.\n\nThe root cause is that vidtv_mux_pid_ctx_init() does not check the\nreturn value of vidtv_mux_create_pid_ctx_once() for PMT section PIDs.\nIf the allocation fails, the PID context is never created, but init\nreturns success. The subsequent vidtv_mux_push_si() call then gets\nNULL from vidtv_mux_get_pid_ctx() and crashes.\n\nFix both the root cause (add error check in vidtv_mux_pid_ctx_init\nfor PMT PIDs) and add defensive NULL checks in vidtv_mux_push_si for\nall vidtv_mux_get_pid_ctx() calls.\n\n[1]\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nWorkqueue: events vidtv_mux_tick\nRIP: 0010:vidtv_psi_ts_psi_write_into+0x54a/0xbc0 drivers/media/test-drivers/vidtv/vidtv_psi.c:197\nCall Trace:\n \u003cTASK\u003e\n vidtv_psi_table_header_write_into drivers/media/test-drivers/vidtv/vidtv_psi.c:799 [inline]\n vidtv_psi_pmt_write_into+0x3b2/0xa70 drivers/media/test-drivers/vidtv/vidtv_psi.c:1231\n vidtv_mux_push_si+0x932/0xe80 drivers/media/test-drivers/vidtv/vidtv_mux.c:196\n vidtv_mux_tick+0xe9b/0x1480 drivers/media/test-drivers/vidtv/vidtv_mux.c:408"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:50:32.686Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/455bc12e7b73ab5a2dfcb47822e91e772bc6c42e"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0f5a1d7056980a0d512456fdb370cfb72bba86a"
        },
        {
          "url": "https://git.kernel.org/stable/c/6df7e16d4f742c80add58995a6e69385b97aa9e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd923dadefadb9671b5ac341b672ff424d429c39"
        },
        {
          "url": "https://git.kernel.org/stable/c/353d9578951dd38bc9679308f5b618ceed1f20fa"
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        {
          "url": "https://git.kernel.org/stable/c/f965cf22dda7f512f4922415894c3e528269a4ae"
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          "url": "https://git.kernel.org/stable/c/b28b12be6e8910489e6800ed93ea4d41dfe19683"
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          "url": "https://git.kernel.org/stable/c/232e4b313ea342672edf8947e067c0de4328405b"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d8bf3d8f91073f4db347ed3aa6302b56107499c"
        }
      ],
      "title": "media: vidtv: fix NULL pointer dereference in vidtv_mux_push_si",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53382",
    "datePublished": "2026-07-19T11:59:31.045Z",
    "dateReserved": "2026-06-09T07:44:35.401Z",
    "dateUpdated": "2026-08-17T04:50:32.686Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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