CVE-2024-38544

RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt

State: Published
Severity: 9.8 Critical
Published: Jun 19, 2024
Updated: Aug 5, 2026
Reserved: Jun 18, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	6.3 Medium	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before c91fb72a2ca6480d8d77262eef52dc5b178463a3Affected 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before de5a059e36657442b5637cc16df5163e435b9cb4Affected 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before e0e14dd35d4242340c7346aac60c7ff8fbf87ffcAffected 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19Affected 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before 21b4c6d4d89030fd4657a8e7c8110fd941049794Affected 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before bbad88f111a1829f366c189aa48e7e58e57553fcAffected 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before 30df4bef8b8e183333e9b6e9d4509d552c7da6ebAffected 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before 2b23b6097303ed0ba5f4bc036a1c07b6027af5c6Affected
LinuxLinux	4.12Affected before 4.12Not affected 5.4.285 through 5.4.Not affected 5.10.227 through 5.10.Not affected 5.15.168 through 5.15.Not affected 6.1.93 through 6.1.Not affected 6.6.33 through 6.6.Not affected 6.8.12 through 6.8.Not affected 6.9.3 through 6.9.*Not affected 6.10 and laterNot affected

Product

Versions

LinuxLinux

0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before c91fb72a2ca6480d8d77262eef52dc5b178463a3Affected
0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before de5a059e36657442b5637cc16df5163e435b9cb4Affected
0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before e0e14dd35d4242340c7346aac60c7ff8fbf87ffcAffected
0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19Affected
0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before 21b4c6d4d89030fd4657a8e7c8110fd941049794Affected
0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before bbad88f111a1829f366c189aa48e7e58e57553fcAffected
0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before 30df4bef8b8e183333e9b6e9d4509d552c7da6ebAffected
0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0 to before 2b23b6097303ed0ba5f4bc036a1c07b6027af5c6Affected

LinuxLinux

4.12Affected
before 4.12Not affected
5.4.285 through 5.4.*Not affected
5.10.227 through 5.10.*Not affected
5.15.168 through 5.15.*Not affected
6.1.93 through 6.1.*Not affected
6.6.33 through 6.6.*Not affected
6.8.12 through 6.8.*Not affected
6.9.3 through 6.9.*Not affected
6.10 and laterNot affected

References

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