NVD / CVE Program· CNA Linux

CVE-2021-47329: scsi: megaraid_sas: Fix resource leak in case of probe failure

MediumCVSS 6.2 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 24/100)

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: 0.26% (FIRST EPSS).
Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 04b6b9ea80906e3b41ff120b45db31768947cf72, 0680db6f41920b2c91c7df3cc9cd5968701a6f74, 0c6226601c3e191a44a57d8f9f814b7e5c308959.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 04b6b9ea80906e3b41ff120b45db31768947cf72, 0680db6f41920b2c91c7df3cc9cd5968701a6f74, 0c6226601c3e191a44a57d8f9f814b7e5c308959 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: megaraid_sas: Fix resource leak in case of probe failure The driver doesn't clean up all the allocated resources properly when scsi_add_host(), megasas_start_aen() function fails during the PCI device probe. Clean up all those resources.

Denial of service

BDU:2025-07351

Published: May 21, 2024
Updated: Jun 17, 2026
EPSS: 0.2% · 17th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 24 / 40 · 6.2 / 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.

Get told when this record changes

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

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

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
- 3.0affected
- 541f90b7c6dffe4cf4a3e8142ac8bd047da94733 and later · before 0c6226601c3e191a44a57d8f9f814b7e5c308959affected · git
- 541f90b7c6dffe4cf4a3e8142ac8bd047da94733 and later · before 0680db6f41920b2c91c7df3cc9cd5968701a6f74affected · git
- 541f90b7c6dffe4cf4a3e8142ac8bd047da94733 and later · before 04b6b9ea80906e3b41ff120b45db31768947cf72affected · git
- 541f90b7c6dffe4cf4a3e8142ac8bd047da94733 and later · before e623f79691c5104317669ab36ec316a90c05062faffected · git
- 541f90b7c6dffe4cf4a3e8142ac8bd047da94733 and later · before b5438f48fdd8e1c3f130d32637511efd32038152affected · git
- before 3.0not affected · semver
- 5.4.134 and later · up to and including 5.4.*not affected · semver
- 5.10.52 and later · up to and including 5.10.*not affected · semver
- 5.12.19 and later · up to and including 5.12.*not affected · semver

Affected versions · NVD (4)

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

linux linux kernelbefore 5.4.134
linux linux kernel5.5 and later · before 5.10.52
linux linux kernel5.11 and later · before 5.12.19
linux linux kernel5.13 and later · before 5.13.4

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 5.14.6-1	5.14.6-1

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-2021-47327May 21, 2024 · iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
28Monitor
← EarlierCVE-2021-47328May 21, 2024 · scsi: iscsi: Fix conn use after free during resets
31Monitor
Later →CVE-2021-47330May 21, 2024 · tty: serial: 8250: serial_cs: Fix a memory leak in error handling path
22Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
Linux Linux	04b6b9ea80906e3b41ff120b45db31768947cf72	Vendor (CNA)
Linux Linux	0680db6f41920b2c91c7df3cc9cd5968701a6f74	Vendor (CNA)
Linux Linux	0c6226601c3e191a44a57d8f9f814b7e5c308959	Vendor (CNA)
Linux Linux	b5438f48fdd8e1c3f130d32637511efd32038152	Vendor (CNA)
Linux Linux	e623f79691c5104317669ab36ec316a90c05062f	Vendor (CNA)
debian:linux	5.14.6-1 · Debian:12	Package 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.

Variant candidates

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

CVE-2024-3946235 days apartclk: bcm: dvp: Assign ->num before accessing ->hws
39Monitor
CVE-2021-444035 days apartx86/xen: Drop USERGS_SYSRET64 paravirt call
35Monitor
CVE-2021-473130 days apartcpufreq: CPPC: Fix potential memleak in cppc_cpufreq_cpu_init
33Monitor
CVE-2024-3861629 days apartwifi: carl9170: re-fix fortified-memset warning
32Monitor
CVE-2021-4702383 days apartnet: marvell: prestera: fix port event handling on init
32Monitor
CVE-2024-359481 days apartbcachefs: Check for journal entries overruning end of sb clean section
31Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

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

TR-24-0519 · May 22, 2024(Linux Kernel Güncellemesi)

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

Someone with local access to the system can trigger it.
No account or password is required.
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: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

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

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

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

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

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

References

git.kernel.org/stable/c/04b6b9ea80906e3b41ff120b45db31768947cf72

Show all references (4 more)

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

All records