CVE-2021-47183
scsi: lpfc: Fix link down processing to address NULL pointer dereference
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-03-25 CVE Reserved
- 2024-04-10 CVE Published
- 2024-04-11 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (2)
URL | Tag | Source |
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URL | Date | SRC |
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URL | Date | SRC |
---|---|---|
https://git.kernel.org/stable/c/28de48a7cea495ab48082d9ff4ef63f7cb4e563a | 2021-11-25 | |
https://git.kernel.org/stable/c/1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6 | 2021-10-21 |
URL | Date | SRC |
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Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.15.5 Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.5" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " < 5.16" | en |
Affected
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