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        "cveId": "CVE-2023-52492",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-02-20T12:30:33.304Z",
        "datePublished": "2024-02-29T15:52:10.499Z",
        "dateUpdated": "2024-08-02T23:03:19.973Z"
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                "shortName": "Linux",
                "dateUpdated": "2024-05-28T19:50:28.956Z"
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            "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->local is freed (with free_percpu()), and chan->local 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->local 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."
                }
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                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
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                            "version": "d2fb0a043838",
                            "lessThan": "9de69732dde4",
                            "status": "affected",
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                            "status": "affected",
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                            "lessThan": "2ab32986a0b9",
                            "status": "affected",
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                        {
                            "version": "d2fb0a043838",
                            "lessThan": "7f0ccfad2031",
                            "status": "affected",
                            "versionType": "git"
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                        {
                            "version": "d2fb0a043838",
                            "lessThan": "9263fd2a6348",
                            "status": "affected",
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                            "version": "d2fb0a043838",
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                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
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                            "version": "5.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.6",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.10.210",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.15.149",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "custom"
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                        {
                            "version": "6.1.76",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "custom"
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                        {
                            "version": "6.6.15",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "custom"
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                        {
                            "version": "6.7.3",
                            "lessThanOrEqual": "6.7.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.8",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
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            "references": [
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                    "url": "https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17"
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                {
                    "url": "https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79"
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                },
                {
                    "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
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            "title": "dmaengine: fix NULL pointer in channel unregistration function",
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