GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2023-52492 (GCVE-0-2023-52492)

Vulnerability from cvelistv5 – Published: 2024-02-29 15:52 – Updated: 2026-05-11 19:28
VLAI
Title
dmaengine: fix NULL pointer in channel unregistration function
Summary
In the Linux kernel, the following vulnerability has been resolved: dmaengine: fix NULL pointer in channel unregistration function __dma_async_device_channel_register() can fail. In case of failure, chan->local is freed (with free_percpu()), and chan->local is nullified. When dma_async_device_unregister() is called (because of managed API or intentionally by DMA controller driver), channels are unconditionally unregistered, leading to this NULL pointer: [ 1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0 [...] [ 1.484499] Call trace: [ 1.486930] device_del+0x40/0x394 [ 1.490314] device_unregister+0x20/0x7c [ 1.494220] __dma_async_device_channel_unregister+0x68/0xc0 Look at dma_async_device_register() function error path, channel device unregistration is done only if chan->local is not NULL. Then add the same condition at the beginning of __dma_async_device_channel_unregister() function, to avoid NULL pointer issue whatever the API used to reach this function.
Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-11 18:32 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d2fb0a0438384fee08a418025f743913020033ce , < 9de69732dde4e443c1c7f89acbbed2c45a6a8e17 (git)
Affected: d2fb0a0438384fee08a418025f743913020033ce , < 047fce470412ab64cb7345f9ff5d06919078ad79 (git)
Affected: d2fb0a0438384fee08a418025f743913020033ce , < 2ab32986a0b9e329eb7f8f04dd57cc127f797c08 (git)
Affected: d2fb0a0438384fee08a418025f743913020033ce , < 7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b (git)
Affected: d2fb0a0438384fee08a418025f743913020033ce , < 9263fd2a63487c6d04cbb7b74a48fb12e1e352d0 (git)
Affected: d2fb0a0438384fee08a418025f743913020033ce , < f5c24d94512f1b288262beda4d3dcb9629222fc7 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.76 , ≤ 6.1.* (semver)
Unaffected: 6.6.15 , ≤ 6.6.* (semver)
Unaffected: 6.7.3 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 4.4,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "HIGH",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-52492",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-03-11T18:32:39.400118Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-06T19:02:52.592Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T23:03:19.973Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/dmaengine.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9de69732dde4e443c1c7f89acbbed2c45a6a8e17",
              "status": "affected",
              "version": "d2fb0a0438384fee08a418025f743913020033ce",
              "versionType": "git"
            },
            {
              "lessThan": "047fce470412ab64cb7345f9ff5d06919078ad79",
              "status": "affected",
              "version": "d2fb0a0438384fee08a418025f743913020033ce",
              "versionType": "git"
            },
            {
              "lessThan": "2ab32986a0b9e329eb7f8f04dd57cc127f797c08",
              "status": "affected",
              "version": "d2fb0a0438384fee08a418025f743913020033ce",
              "versionType": "git"
            },
            {
              "lessThan": "7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b",
              "status": "affected",
              "version": "d2fb0a0438384fee08a418025f743913020033ce",
              "versionType": "git"
            },
            {
              "lessThan": "9263fd2a63487c6d04cbb7b74a48fb12e1e352d0",
              "status": "affected",
              "version": "d2fb0a0438384fee08a418025f743913020033ce",
              "versionType": "git"
            },
            {
              "lessThan": "f5c24d94512f1b288262beda4d3dcb9629222fc7",
              "status": "affected",
              "version": "d2fb0a0438384fee08a418025f743913020033ce",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/dmaengine.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.149",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.76",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.210",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.149",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.76",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.15",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.3",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: fix NULL pointer in channel unregistration function\n\n__dma_async_device_channel_register() can fail. In case of failure,\nchan-\u003elocal is freed (with free_percpu()), and chan-\u003elocal is nullified.\nWhen dma_async_device_unregister() is called (because of managed API or\nintentionally by DMA controller driver), channels are unconditionally\nunregistered, leading to this NULL pointer:\n[    1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0\n[...]\n[    1.484499] Call trace:\n[    1.486930]  device_del+0x40/0x394\n[    1.490314]  device_unregister+0x20/0x7c\n[    1.494220]  __dma_async_device_channel_unregister+0x68/0xc0\n\nLook at dma_async_device_register() function error path, channel device\nunregistration is done only if chan-\u003elocal is not NULL.\n\nThen add the same condition at the beginning of\n__dma_async_device_channel_unregister() function, to avoid NULL pointer\nissue whatever the API used to reach this function."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:28:23.034Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17"
        },
        {
          "url": "https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79"
        },
        {
          "url": "https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08"
        },
        {
          "url": "https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b"
        },
        {
          "url": "https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7"
        }
      ],
      "title": "dmaengine: fix NULL pointer in channel unregistration function",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52492",
    "datePublished": "2024-02-29T15:52:10.499Z",
    "dateReserved": "2024-02-20T12:30:33.304Z",
    "dateUpdated": "2026-05-11T19:28:23.034Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-52492",
      "date": "2026-09-14",
      "epss": "0.00271",
      "percentile": "0.19319"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52492\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-11T18:15:16.877\",\"lastModified\":\"2026-06-17T06:42:51.210\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndmaengine: fix NULL pointer in channel unregistration function\\n\\n__dma_async_device_channel_register() can fail. In case of failure,\\nchan-\u003elocal is freed (with free_percpu()), and chan-\u003elocal is nullified.\\nWhen dma_async_device_unregister() is called (because of managed API or\\nintentionally by DMA controller driver), channels are unconditionally\\nunregistered, leading to this NULL pointer:\\n[    1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0\\n[...]\\n[    1.484499] Call trace:\\n[    1.486930]  device_del+0x40/0x394\\n[    1.490314]  device_unregister+0x20/0x7c\\n[    1.494220]  __dma_async_device_channel_unregister+0x68/0xc0\\n\\nLook at dma_async_device_register() function error path, channel device\\nunregistration is done only if chan-\u003elocal is not NULL.\\n\\nThen add the same condition at the beginning of\\n__dma_async_device_channel_unregister() function, to avoid NULL pointer\\nissue whatever the API used to reach this function.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: dmaengine: corrige el puntero NULL en la funci\u00f3n de cancelaci\u00f3n del registro del canal __dma_async_device_channel_register() puede fallar. En caso de falla, chan-\u0026gt;local se libera (con free_percpu()) y chan-\u0026gt;local se anula. Cuando se llama a dma_async_device_unregister() (debido a una API administrada o intencionalmente por el controlador del controlador DMA), los canales se anulan incondicionalmente, lo que lleva a este puntero NULL: [1.318693] No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 00000000000000d0 [...] [ 1.484499] Seguimiento de llamadas: [ 1.486930] device_del+0x40/0x394 [ 1.490314] device_unregister+0x20/0x7c [ 1.494220] __dma_async_device_channel_unregister+0x68/0xc0 Mire la ruta de error de la funci\u00f3n dma_async_device_register(), cancelaci\u00f3n del registro del dispositivo La raci\u00f3n se realiza s\u00f3lo si chan-\u0026gt;local es no nulo. Luego agregue la misma condici\u00f3n al comienzo de la funci\u00f3n __dma_async_device_channel_unregister(), para evitar problemas de puntero NULL cualquiera que sea la API utilizada para alcanzar esta funci\u00f3n.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/dma/dmaengine.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d2fb0a0438384fee08a418025f743913020033ce\",\"lessThan\":\"9de69732dde4e443c1c7f89acbbed2c45a6a8e17\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d2fb0a0438384fee08a418025f743913020033ce\",\"lessThan\":\"047fce470412ab64cb7345f9ff5d06919078ad79\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d2fb0a0438384fee08a418025f743913020033ce\",\"lessThan\":\"2ab32986a0b9e329eb7f8f04dd57cc127f797c08\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d2fb0a0438384fee08a418025f743913020033ce\",\"lessThan\":\"7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d2fb0a0438384fee08a418025f743913020033ce\",\"lessThan\":\"9263fd2a63487c6d04cbb7b74a48fb12e1e352d0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d2fb0a0438384fee08a418025f743913020033ce\",\"lessThan\":\"f5c24d94512f1b288262beda4d3dcb9629222fc7\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/dma/dmaengine.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.210\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.149\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.76\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.15\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7.3\",\"lessThanOrEqual\":\"6.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":4.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":0.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-03-11T18:32:39.400118Z\",\"id\":\"CVE-2023-52492\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.6\",\"versionEndExcluding\":\"5.10.210\",\"matchCriteriaId\":\"9681BF9E-71B2-4874-8F0D-A24B65CC7ACD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.149\",\"matchCriteriaId\":\"0D0465BB-4053-4E15-9137-6696EBAE90FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.76\",\"matchCriteriaId\":\"32F0FEB3-5FE1-4400-A56D-886F09BE872E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.15\",\"matchCriteriaId\":\"87C718CB-AE3D-4B07-B4D9-BFF64183C468\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.3\",\"matchCriteriaId\":\"58FD5308-148A-40D3-B36A-0CA6B434A8BF\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:44:33+00:00",
      "cve": "CVE-2023-52492",
      "id": "CVE-2023-52492",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "709",
      "product_status:known_affected": "64",
      "product_status:known_not_affected": "8",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dmaengine: fix NULL pointer in channel unregistration function",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52492.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T23:03:19.973Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.4, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52492\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-03-11T18:32:39.400118Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-05T15:20:41.632Z\"}}], \"cna\": {\"title\": \"dmaengine: fix NULL pointer in channel unregistration function\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d2fb0a0438384fee08a418025f743913020033ce\", \"lessThan\": \"9de69732dde4e443c1c7f89acbbed2c45a6a8e17\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d2fb0a0438384fee08a418025f743913020033ce\", \"lessThan\": \"047fce470412ab64cb7345f9ff5d06919078ad79\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d2fb0a0438384fee08a418025f743913020033ce\", \"lessThan\": \"2ab32986a0b9e329eb7f8f04dd57cc127f797c08\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d2fb0a0438384fee08a418025f743913020033ce\", \"lessThan\": \"7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d2fb0a0438384fee08a418025f743913020033ce\", \"lessThan\": \"9263fd2a63487c6d04cbb7b74a48fb12e1e352d0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d2fb0a0438384fee08a418025f743913020033ce\", \"lessThan\": \"f5c24d94512f1b288262beda4d3dcb9629222fc7\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/dma/dmaengine.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.210\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.149\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/dma/dmaengine.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17\"}, {\"url\": \"https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79\"}, {\"url\": \"https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08\"}, {\"url\": \"https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b\"}, {\"url\": \"https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0\"}, {\"url\": \"https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndmaengine: fix NULL pointer in channel unregistration function\\n\\n__dma_async_device_channel_register() can fail. In case of failure,\\nchan-\u003elocal is freed (with free_percpu()), and chan-\u003elocal is nullified.\\nWhen dma_async_device_unregister() is called (because of managed API or\\nintentionally by DMA controller driver), channels are unconditionally\\nunregistered, leading to this NULL pointer:\\n[    1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0\\n[...]\\n[    1.484499] Call trace:\\n[    1.486930]  device_del+0x40/0x394\\n[    1.490314]  device_unregister+0x20/0x7c\\n[    1.494220]  __dma_async_device_channel_unregister+0x68/0xc0\\n\\nLook at dma_async_device_register() function error path, channel device\\nunregistration is done only if chan-\u003elocal is not NULL.\\n\\nThen add the same condition at the beginning of\\n__dma_async_device_channel_unregister() function, to avoid NULL pointer\\nissue whatever the API used to reach this function.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.76\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.15\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.3\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"5.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:28:23.034Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52492\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:28:23.034Z\", \"dateReserved\": \"2024-02-20T12:30:33.304Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-29T15:52:10.499Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.