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
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)
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)
Create a notification for this product.
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}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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