by Kastro
Paper/Archive/CVE-2024-38544

CVE-2024-38544

Linux Linux — RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt

EPSS 0.8%CVSS 9.8
critical.is priorityof 100
41
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 57.1.571 × 2011.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Linux0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 – < c91fb72a2ca6480d8d77262eef52dc5b178463a3c91fb72a2ca6480d8d77262eef52dc5b178463a3CNA
Linux0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 – < de5a059e36657442b5637cc16df5163e435b9cb4de5a059e36657442b5637cc16df5163e435b9cb4CNA
Linux0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 – < e0e14dd35d4242340c7346aac60c7ff8fbf87ffce0e14dd35d4242340c7346aac60c7ff8fbf87ffcCNA
Linux0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 – < faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19CNA
Linux0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 – < 21b4c6d4d89030fd4657a8e7c8110fd94104979421b4c6d4d89030fd4657a8e7c8110fd941049794CNA
Linux0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 – < bbad88f111a1829f366c189aa48e7e58e57553fcbbad88f111a1829f366c189aa48e7e58e57553fcCNA
Linux0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 – < 30df4bef8b8e183333e9b6e9d4509d552c7da6eb30df4bef8b8e183333e9b6e9d4509d552c7da6ebCNA
Linux0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 – < 2b23b6097303ed0ba5f4bc036a1c07b6027af5c62b23b6097303ed0ba5f4bc036a1c07b6027af5c6CNA
Linux4.12–CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP6.3CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refgit.kernel.org/stable/c/c91fb72a2ca6480d8d77262eef52dc5b178463a3refgit.kernel.org/stable/c/de5a059e36657442b5637cc16df5163e435b9cb4refgit.kernel.org/stable/c/e0e14dd35d4242340c7346aac60c7ff8fbf87ffcrefgit.kernel.org/stable/c/faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19refgit.kernel.org/stable/c/21b4c6d4d89030fd4657a8e7c8110fd941049794refgit.kernel.org/stable/c/bbad88f111a1829f366c189aa48e7e58e57553fcrefgit.kernel.org/stable/c/30df4bef8b8e183333e9b6e9d4509d552c7da6ebrefgit.kernel.org/stable/c/2b23b6097303ed0ba5f4bc036a1c07b6027af5c6reflists.debian.org/debian-lts-announce/2025/03/msg00002.html