CVE-2023-52492
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-52492
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-52492.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2023-52492
- Downstream
- Related
- Published
- 2024-02-29T15:52:10.499Z
- Modified
- 2025-11-28T02:34:39.118822Z
- Severity
-
- 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- dmaengine: fix NULL pointer in channel unregistration function
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: fix NULL pointer in channel unregistration function
_dmaasyncdevicechannelregister() can fail. In case of failure, chan->local is freed (with freepercpu()), and chan->local is nullified. When dmaasyncdeviceunregister() 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] devicedel+0x40/0x394 [ 1.490314] deviceunregister+0x20/0x7c [ 1.494220] _dmaasyncdevicechannelunregister+0x68/0xc0
Look at dmaasyncdevice_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 _dmaasyncdevicechannel_unregister() function, to avoid NULL pointer issue whatever the API used to reach this function.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52492.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/047fce470412ab64cb7345f9ff5d06919078ad79
- https://git.kernel.org/stable/c/2ab32986a0b9e329eb7f8f04dd57cc127f797c08
- https://git.kernel.org/stable/c/7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b
- https://git.kernel.org/stable/c/9263fd2a63487c6d04cbb7b74a48fb12e1e352d0
- https://git.kernel.org/stable/c/9de69732dde4e443c1c7f89acbbed2c45a6a8e17
- https://git.kernel.org/stable/c/f5c24d94512f1b288262beda4d3dcb9629222fc7
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52492.json
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-52492
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd2fb0a0438384fee08a418025f743913020033ceFixed9de69732dde4e443c1c7f89acbbed2c45a6a8e17Fixed047fce470412ab64cb7345f9ff5d06919078ad79Fixed2ab32986a0b9e329eb7f8f04dd57cc127f797c08Fixed7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50bFixed9263fd2a63487c6d04cbb7b74a48fb12e1e352d0Fixedf5c24d94512f1b288262beda4d3dcb9629222fc7