CVE-2024-38544

MEDIUM
Published Jun 19, 2024 Modified Nov 3, 2025 CWE-416

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.

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CVSS v3.1 Score

6.3
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/21b4c6d4d89030fd4657a8e7c8110fd941049794 https://git.kernel.org/stable/c/2b23b6097303ed0ba5f4bc036a1c07b6027af5c6 https://git.kernel.org/stable/c/30df4bef8b8e183333e9b6e9d4509d552c7da6eb https://git.kernel.org/stable/c/bbad88f111a1829f366c189aa48e7e58e57553fc 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/2b23b6097303ed0ba5f4bc036a1c07b6027af5c6 https://git.kernel.org/stable/c/30df4bef8b8e183333e9b6e9d4509d552c7da6eb https://git.kernel.org/stable/c/bbad88f111a1829f366c189aa48e7e58e57553fc https://git.kernel.org/stable/c/faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19

Frequently Asked Questions

What is CVE-2024-38544? +
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. It has a CVSS v3.1 base score of 6.3 (MEDIUM).
How severe is CVE-2024-38544? +
CVE-2024-38544 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-38544? +
CVE-2024-38544 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-38544? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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