Bug 2298118 (CVE-2022-48782)

Summary: CVE-2022-48782 kernel: mctp: fix use after free
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: kernel 5.16.11, kernel 5.17 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the Linux kernel in the mctp_route_input() function, where a lack of proper checks allows a potential use-after-free scenario to occur when the function mctp_key_add() fails and frees the key object's memory, which the function trace_mctp_key_acquire() then attempts to access. This could lead to memory corruption or crashes.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2024-07-16 12:23:57 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mctp: fix use after free

Clang static analysis reports this problem
route.c:425:4: warning: Use of memory after it is freed
  trace_mctp_key_acquire(key);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
When mctp_key_add() fails, key is freed but then is later
used in trace_mctp_key_acquire().  Add an else statement
to use the key only when mctp_key_add() is successful.