5.5

CVE-2021-47480: scsi: core: Put LLD module refcnt after SCSI device is released

Analyzed
AliasesUBUNTU-CVE-2021-47480DEBIAN-CVE-2021-47480
Published 22-05-2024Last modified 11-05-2026

Vulnerability summary

CVE-2021-47480 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.21%
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 10 · Related 10
SUSE-SU-2024:1979-1SUSE-SU-2024:1983-1SUSE-SU-2024:2008-1SUSE-SU-2024:2010-1SUSE-SU-2024:2011-1SUSE-SU-2024:2019-1

Timeline

  1. 22-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler. Make sure to put LLD module refcnt after SCSI device is released. Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% 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

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu89 products
  • linuxAll versions (No fix recorded) | < 4.15.0-167.175 | < 5.4.0-97.110
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1119.127 | < 5.4.0-1064.67
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 65110b2168950a19cc78b5027ed18cb811fbdae8, < 1105573d964f7b78734348466b01f5f6ba8a1813 | ≥ 65110b2168950a19cc78b5027ed18cb811fbdae8, < 8e4814a461787e15a31d322d9efbe0d4f6822428 | ≥ 65110b2168950a19cc78b5027ed18cb811fbdae8, < 61a0faa89f21861d1f8d059123b5c285a5d9ffee | ≥ 65110b2168950a19cc78b5027ed18cb811fbdae8, < c2df161f69fb1c67f63adbd193368b47f511edc0 | ≥ 65110b2168950a19cc78b5027ed18cb811fbdae8, < 1ce287eff9f23181d5644db787f472463a61f68b | ≥ 65110b2168950a19cc78b5027ed18cb811fbdae8, < 7b57c38d12aed1b5d92f74748bed25e0d041729f | ≥ 65110b2168950a19cc78b5027ed18cb811fbdae8, < f30822c0b4c35ec86187ab055263943dc71a6836 | ≥ 65110b2168950a19cc78b5027ed18cb811fbdae8, < f2b85040acec9a928b4eb1b57a989324e8e38d3f | 2.6.16
  • linux_kernel< 4.4.292 | ≥ 4.5, < 4.9.290 | ≥ 4.10, < 4.14.255 | ≥ 4.15, < 4.19.216 | ≥ 4.20, < 5.4.158 | ≥ 5.5, < 5.10.78 | ≥ 5.11, < 5.14.17 | 5.15:rc1 | 5.15:rc2 | 5.15:rc3 | 5.15:rc4 | 5.15:rc5 | 5.15:rc6
Debian1 product
  • linux< 5.15.3-1

3 vendors · 92 products

References

12 links
Show all 12 references