CVE-2024-38544

RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt In rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the resp_pkts queue and then a decision is made whether to run the completer task inline or schedule it. Finally the skb is dereferenced to bump a 'hw' performance counter. This is wrong because if the completer task is already running in a separate thread it may have already processed the skb and freed it which can cause a seg fault. This has been observed infrequently in testing at high scale. This patch fixes this by changing the order of enqueuing the packet until after the counter is accessed.

6.3

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.05%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/c91fb72a2ca6480d8d77262eef52dc5b178463a3
https://git.kernel.org/stable/c/de5a059e36657442b5637cc16df5163e435b9cb4
https://git.kernel.org/stable/c/e0e14dd35d4242340c7346aac60c7ff8fbf87ffc
https://git.kernel.org/stable/c/faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19
https://git.kernel.org/stable/c/21b4c6d4d89030fd4657a8e7c8110fd941049794
https://git.kernel.org/stable/c/bbad88f111a1829f366c189aa48e7e58e57553fc
https://git.kernel.org/stable/c/30df4bef8b8e183333e9b6e9d4509d552c7da6eb
https://git.kernel.org/stable/c/2b23b6097303ed0ba5f4bc036a1c07b6027af5c6

Frequently Asked Questions

What is the severity of CVE-2024-38544?: CVE-2024-38544 has been scored as a medium severity vulnerability.
How to fix CVE-2024-38544?: To fix CVE-2024-38544, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-38544 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-38544 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-38544?: CVE-2024-38544 affects Linux Linux, Linux Linux.

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