CVE-2022-48782

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.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Potential Mitigations

References

• https://git.kernel.org/stable/c/1dd3ecbec5f606b2a526c47925c8634b1a6bb81e
• https://git.kernel.org/stable/c/7e5b6a5c8c44310784c88c1c198dde79f6402f7b
• https://git.kernel.org/stable/c/1dd3ecbec5f606b2a526c47925c8634b1a6bb81e
• https://git.kernel.org/stable/c/7e5b6a5c8c44310784c88c1c198dde79f6402f7b