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NVD / CVE Program· CNA Linux

CVE-2021-47188: scsi: ufs: core: Improve SCSI abort handling

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.23% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566, 9491bc16082d9a402c9099acbfffc89af6f9316f, c36baca06efa833adaefba61f45fefdc49b6d070.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566, 9491bc16082d9a402c9099acbfffc89af6f9316f, c36baca06efa833adaefba61f45fefdc49b6d070 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: scsi: ufs: core: Improve SCSI abort handling The following has been observed on a test setup: WARNING: CPU: 4 PID: 250 at drivers/scsi/ufs/ufshcd.c:2737 ufshcd_queuecommand+0x468/0x65c Call trace: ufshcd_queuecommand+0x468/0x65c scsi_send_eh_cmnd+0x224/0x6a0 scsi_eh_test_devices+0x248/0x418 scsi_eh_ready_devs+0xc34/0xe58 scsi_error_handler+0x204/0x80c kthread+0x150/0x1b4 ret_from_fork+0x10/0x30 That warning is triggered by the following statement: WARN_ON(lrbp->cmd); Fix this warning by clearing lrbp->cmd from the abort handler.

Published
Apr 10, 2024
Updated
Aug 5, 2026
EPSS
0.2% · 15th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.4 and later · before 5.15.5
  • linux linux kernel5.16

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.4affected
    • 7a3e97b0dc4bbac2ba7803564ab0057722689921 and later · before 9491bc16082d9a402c9099acbfffc89af6f9316faffected · git
    • 7a3e97b0dc4bbac2ba7803564ab0057722689921 and later · before c36baca06efa833adaefba61f45fefdc49b6d070affected · git
    • 7a3e97b0dc4bbac2ba7803564ab0057722689921 and later · before 3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566affected · git
    • before 3.4not affected · semver
    • 5.10.258 and later · up to and including 5.10.*not affected · semver
    • 5.15.5 and later · up to and including 5.15.*not affected · semver
    • 5.16 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.15.5-15.15.5-1
openSUSE:Leap 15.5dtb-aarch64before 5.14.21-150500.55.62.15.14.21-150500.55.62.1
openSUSE:Leap 15.5kernel-64kbbefore 5.14.21-150500.55.62.25.14.21-150500.55.62.2
openSUSE:Leap 15.5kernel-azurebefore 5.14.21-150500.33.51.15.14.21-150500.33.51.1
openSUSE:Leap 15.5kernel-debugbefore 5.14.21-150500.55.62.25.14.21-150500.55.62.2
openSUSE:Leap 15.5kernel-defaultbefore 5.14.21-150500.55.62.25.14.21-150500.55.62.2
openSUSE:Leap 15.5kernel-default-basebefore 5.14.21-150500.55.62.2.150500.6.27.25.14.21-150500.55.62.2.150500.6.27.2
openSUSE:Leap 15.5kernel-docsbefore 5.14.21-150500.55.62.25.14.21-150500.55.62.2
openSUSE:Leap 15.5kernel-kvmsmallbefore 5.14.21-150500.55.62.25.14.21-150500.55.62.2
openSUSE:Leap 15.5kernel-obs-buildbefore 5.14.21-150500.55.62.25.14.21-150500.55.62.2
openSUSE:Leap 15.5kernel-obs-qabefore 5.14.21-150500.55.62.15.14.21-150500.55.62.1
openSUSE:Leap 15.5kernel-rtbefore 5.14.21-150500.13.52.15.14.21-150500.13.52.1
openSUSE:Leap 15.5kernel-rt_debugbefore 5.14.21-150500.13.52.15.14.21-150500.13.52.1
openSUSE:Leap 15.5kernel-sourcebefore 5.14.21-150500.55.62.25.14.21-150500.55.62.2
openSUSE:Leap 15.5kernel-source-azurebefore 5.14.21-150500.33.51.15.14.21-150500.33.51.1
openSUSE:Leap 15.5kernel-source-rtbefore 5.14.21-150500.13.52.15.14.21-150500.13.52.1
openSUSE:Leap 15.5kernel-symsbefore 5.14.21-150500.55.62.15.14.21-150500.55.62.1
openSUSE:Leap 15.5kernel-syms-azurebefore 5.14.21-150500.33.51.15.14.21-150500.33.51.1
openSUSE:Leap 15.5kernel-syms-rtbefore 5.14.21-150500.13.52.15.14.21-150500.13.52.1
openSUSE:Leap 15.5kernel-zfcpdumpbefore 5.14.21-150500.55.62.25.14.21-150500.55.62.2
openSUSE:Leap Micro 5.3kernel-defaultbefore 5.14.21-150400.24.119.15.14.21-150400.24.119.1
openSUSE:Leap Micro 5.3kernel-default-basebefore 5.14.21-150400.24.119.1.150400.24.56.15.14.21-150400.24.119.1.150400.24.56.1
openSUSE:Leap Micro 5.3kernel-rtbefore 5.14.21-150400.15.79.15.14.21-150400.15.79.1
SUSE:Linux Enterprise High Availability Extension 12 SP5kernel-defaultbefore 4.12.14-122.219.14.12.14-122.219.1

+40

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2021-47186Apr 10, 2024 · tipc: check for null after calling kmemdup
    22Monitor
  • ← EarlierCVE-2021-47187Apr 10, 2024 · arm64: dts: qcom: msm8998: Fix CPU/L2 idle state latency and residency
    22Monitor
  • Later →CVE-2021-47189Apr 10, 2024 · btrfs: fix memory ordering between normal and ordered work functions
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3ff1f6b6ba6f97f50862aa50e79959cc8ddc2566Vendor (CNA)
Linux Linux9491bc16082d9a402c9099acbfffc89af6f9316fVendor (CNA)
Linux Linuxc36baca06efa833adaefba61f45fefdc49b6d070Vendor (CNA)
debian:linux5.15.5-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch645.14.21-150500.55.62.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-64kb5.14.21-150500.55.62.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-azure5.14.21-150500.33.51.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-debug5.14.21-150500.55.62.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-default5.14.21-150400.24.119.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:kernel-default-base5.14.21-150400.24.119.1.150400.24.56.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:kernel-docs5.14.21-150500.55.62.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-kvmsmall5.14.21-150500.55.62.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-obs-build5.14.21-150500.55.62.2 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-rt5.14.21-150400.15.79.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
opensuse:kernel-source-azure5.14.21-150500.33.51.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-syms-azure5.14.21-150500.33.51.1 · openSUSE:Leap 15.5Package registry (OSV)
suse:kernel-64kb5.14.21-150400.24.119.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-azure5.14.21-150500.33.51.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-default5.14.21-150400.24.119.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:kernel-default-base5.14.21-150400.24.119.1.150400.24.56.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:kernel-docs5.14.21-150400.24.119.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP4_Update_261-150400.9.3.1 · SUSE:Linux Enterprise Live Patching 15 SP4Package registry (OSV)
suse:kernel-obs-build5.14.21-150400.24.119.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-source5.14.21-150400.24.119.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-source-azure5.14.21-150500.33.51.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-syms5.14.21-150400.24.119.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:kernel-syms-azure5.14.21-150500.33.51.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-zfcpdump5.14.21-150400.24.119.1 · SUSE:Linux Enterprise Server 15 SP4-LTSSPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records