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osvGoogleOSV:UBUNTU-CVE-2024-38544
HistoryJun 19, 2024 - 2:15 p.m.

UBUNTU-CVE-2024-38544

2024-06-1914:15:00
Google
osv.dev
linux kernel
rdma/rxe
vulnerability
software
seg fault

AI Score

6.5

Confidence

Low

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.