8.8

CVE-2021-47183: scsi: lpfc: Fix link down processing to address NULL pointer dereference

Modified
AliasesUBUNTU-CVE-2021-47183DEBIAN-CVE-2021-47183
Published 10-04-2024Last modified 05-08-2026

Vulnerability summary

CVE-2021-47183 is a high (CVSS 8.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 26.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.34%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 11
DLA-4327-1SUSE-SU-2024:1454-1SUSE-SU-2024:1465-1SUSE-SU-2024:1489-1SUSE-SU-2024:1490-1SUSE-SU-2024:1641-1

Timeline

  1. 10-04-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.34% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu91 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf, < 04c1af683270e4709a594bb1691b8800b945035a | ≥ 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf, < 28de48a7cea495ab48082d9ff4ef63f7cb4e563a | ≥ 70f3c073362ef7b5e55c92b83eb2dd9a7fb4e9bf, < 1854f53ccd88ad4e7568ddfafafffe71f1ceb0a6 | 2.6.38
  • linux_kernel< 5.15.5
Debian1 product
  • linux< 5.15.5-1

3 vendors · 94 products

References

8 links