Lucene search

K
ubuntucveUbuntu.comUB:CVE-2024-38544
HistoryJun 20, 2024 - 12:00 a.m.

CVE-2024-38544

2024-06-2000:00:00
ubuntu.com
ubuntu.com
1
linux kernel
vulnerability
cve-2024-38544
fix
rdma
rxe_comp_queue_pkt
seg fault
enqueuing
response packet
skb
completer task
inline
schedule
dereferenced
'hw' performance counter
patch
high scale
testing

6.8 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

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.

6.8 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%