CVE-2024-38544

Advisory lineage Upstream: 0 Downstream: 40
Modified
Published: 19 Jun 2024, 13:35
Last modified:11 May 2026, 20:18

Vulnerability Summary

Overall Risk (default)
medium
25/100
CVSS Score
6.3 MEDIUM
v3.1 (cve.org)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Jun 2024, 13:35
Published
Vulnerability first disclosed
11 May 2026, 20:18
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 6.3CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 3%

Techniques & Countermeasures

  • CWE-416•Use After Free

    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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 Systems

  • linux•linux

    ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < c91fb72a2ca6480d8d77262eef52dc5b178463a3 | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < de5a059e36657442b5637cc16df5163e435b9cb4 | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < e0e14dd35d4242340c7346aac60c7ff8fbf87ffc | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19 | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < 21b4c6d4d89030fd4657a8e7c8110fd941049794 | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < bbad88f111a1829f366c189aa48e7e58e57553fc | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < 30df4bef8b8e183333e9b6e9d4509d552c7da6eb | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < 2b23b6097303ed0ba5f4bc036a1c07b6027af5c6 | 4.12

  • linux•linux_kernel

    ≥ 4.12, < 5.4.285 | ≥ 5.5, < 5.10.227 | ≥ 5.11, < 5.15.168 | ≥ 5.16, < 6.1.93 | ≥ 6.2, < 6.6.33 | ≥ 6.7, < 6.8.12 | ≥ 6.9, < 6.9.3

References (9)