CVE-2023-52492
Linux Kernel DMAasync NULL Pointer Dereference Vulnerability in device_unregister
Description
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.
INFO
Published Date :
March 11, 2024, 6:15 p.m.
Last Modified :
April 4, 2025, 2:41 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
0.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-52492.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-52492 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-52492 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Apr. 04, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.3 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.15 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.149 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.76 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.6 up to (excluding) 5.10.210 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Added Reference Type CVE: https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7 Types: Patch Added Reference Type CVE: https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Types: Mailing List -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79 Added Reference https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08 Added Reference https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b Added Reference https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0 Added Reference https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17 Added Reference https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7 Added Reference https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 06, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-476 Added CVSS V3.1 CISA-ADP AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Nov. 04, 2024
Action Type Old Value New Value Removed Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2024
Action Type Old Value New Value Added Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html [No types assigned] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 11, 2024
Action Type Old Value New Value Added Description 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. Added Reference Linux https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-52492 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-52492
weaknesses.