ghsa-6hr8-534p-8986
Vulnerability from github
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.
{
"affected": [],
"aliases": [
"CVE-2023-52492"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-11T18:15:16Z",
"severity": "MODERATE"
},
"details": "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.",
"id": "GHSA-6hr8-534p-8986",
"modified": "2024-11-06T21:30:53Z",
"published": "2024-03-11T18:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52492"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.