Bug 2217915 (CVE-2023-3439) - CVE-2023-3439 kernel: mctp: use-after-free read in mctp_local_output()
Summary: CVE-2023-3439 kernel: mctp: use-after-free read in mctp_local_output()
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2023-3439
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2218028 2218029
Blocks: 2217909
TreeView+ depends on / blocked
 
Reported: 2023-06-27 13:04 UTC by Dhananjay Arunesh
Modified: 2023-07-04 19:41 UTC (History)
45 users (show)

Fixed In Version: kernel 5.18-rc5
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the MCTP protocol in the Linux kernel. The function mctp_unregister() reclaims the device's relevant resource when a netcard detaches. However, a running routine may be unaware of this and cause the use-after-free of the mdev->addrs object, potentially leading to a denial of service.
Clone Of:
Environment:
Last Closed: 2023-06-28 07:53:12 UTC
Embargoed:

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Description Dhananjay Arunesh 2023-06-27 13:04:26 UTC 
The function mctp_unregister() reclaims the device's relevant resource
when a netcard detaches. However, a running routine may be unaware of
this and cause the use-after-free of the mdev->addrs object.

References:
https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269
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