Lucene search

K
debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2021-47183
HistoryApr 10, 2024 - 7:15 p.m.

CVE-2021-47183

2024-04-1019:15:47
Debian Security Bug Tracker
security-tracker.debian.org
13
linux kernel
scsi
lpfc
null pointer vulnerability
fix
link down
abts requests
driver unload
log messages
els requests

AI Score

6.6

Confidence

High

EPSS

0

Percentile

9.0%

In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix link down processing to address NULL pointer dereference If an FC link down transition while PLOGIs are outstanding to fabric well known addresses, outstanding ABTS requests may result in a NULL pointer dereference. Driver unload requests may hang with repeated “2878” log messages. The Link down processing results in ABTS requests for outstanding ELS requests. The Abort WQEs are sent for the ELSs before the driver had set the link state to down. Thus the driver is sending the Abort with the expectation that an ABTS will be sent on the wire. The Abort request is stalled waiting for the link to come up. In some conditions the driver may auto-complete the ELSs thus if the link does come up, the Abort completions may reference an invalid structure. Fix by ensuring that Abort set the flag to avoid link traffic if issued due to conditions where the link failed.

AI Score

6.6

Confidence

High

EPSS

0

Percentile

9.0%