CVE-2024-38544
CVE-2024-38544 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.
Key facts
- Severity: Medium (CVSS 3.x base score 6.3)
- EPSS exploit prediction: 0% (16th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2024-37407
- Weakness: CWE-416
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
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.
- How severe is CVE-2024-38544?
- CVE-2024-38544 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
- Is CVE-2024-38544 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2024-38544?
- CVE-2024-38544 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2024-38544?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2024-38544 have an EU (EUVD) identifier?
- Yes. CVE-2024-38544 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37407.
- When was CVE-2024-38544 published?
- CVE-2024-38544 was published on 2024-06-19 and last updated on 2026-06-17.
References
- 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://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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