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NVD / CVE Program· CNA Linux

CVE-2021-46985: ACPI: scan: Fix a memory leak in an error handling path

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: 0.24% (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 0c8bd174f0fc131bc9dfab35cd8784f59045da87, 4.14.233, 4.19.191.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0c8bd174f0fc131bc9dfab35cd8784f59045da87, 4.14.233, 4.19.191 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: ACPI: scan: Fix a memory leak in an error handling path If 'acpi_device_set_name()' fails, we must free 'acpi_device_bus_id->bus_id' or there is a (potential) memory leak.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 28, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 16th percentile

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.

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.

Follow CVE-2021-46985

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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 kernel4.9.264 and later · before 4.9.269
  • linux linux kernel4.14.228 and later · before 4.14.233
  • linux linux kernel4.19.184 and later · before 4.19.191
  • linux linux kernel5.4.109 and later · before 5.4.120
  • linux linux kernel5.10.27 and later · before 5.10.38
  • linux linux kernel5.11.11 and later · before 5.11.22
  • linux linux kernel5.12 and later · before 5.12.5
  • linux linux kernel5.13

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

    • 5.12affected
    • e5cdbe419004e172f642e876a671a9ff1c52f8bb and later · before 6901a4f795e0e8d65ae779cb37fc22e0bf294712affected · git
    • 717d9d88fbd956ab03fad97266f6ce63a036e7f8 and later · before 5ab9857dde7c3ea3faef6b128d718cf8ba98721baffected · git
    • 7385e438e1f31af5b86f72fd19b0dcd2738502c9 and later · before 69cc821e89ce572884548ac54c4f80eec7a837a5affected · git
    • bc0b1a2036dd8072106ec81a8685ecb901f72ed6 and later · before dafd4c0b5e835db020cff11c74b4af9493a58e72affected · git
    • 4a5891992c680d69d7e490e4d0428d17779d8e85 and later · before e2381174daeae0ca35eddffef02dcc8de8c1ef8aaffected · git
    • 321dbe6c0b551f9f8030becc6900f77cf9bbb9ad and later · before c5c8f6ffc942cf42f990f22e35bcf4cbe9d8c2fbaffected · git
    • eb50aaf960e3bedfef79063411ffd670da94b84b and later · before a7e17a8d421ae23c920240625b4413c7b94d94a4affected · git
    • eb50aaf960e3bedfef79063411ffd670da94b84b and later · before 0c8bd174f0fc131bc9dfab35cd8784f59045da87affected · git
    • 4.9.264 and later · before 4.9.269affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.10.38-15.10.38-1

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-2021-46983Feb 28, 2024 · nvmet-rdma: Fix NULL deref when SEND is completed with error
    22Monitor
  • ← EarlierCVE-2021-46984Feb 28, 2024 · kyber: fix out of bounds access when preempted
    31Monitor
  • Later →CVE-2021-46986Feb 28, 2024 · usb: dwc3: gadget: Free gadget structure only after freeing endpoints
    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 / packageFixed versionSource
Linux Linux0c8bd174f0fc131bc9dfab35cd8784f59045da87Vendor (CNA)
Linux Linux4.14.233Vendor (CNA)
Linux Linux4.19.191Vendor (CNA)
Linux Linux4.9.269Vendor (CNA)
Linux Linux5.10.38Vendor (CNA)
Linux Linux5.11.22Vendor (CNA)
Linux Linux5.4.120Vendor (CNA)
Linux Linux5ab9857dde7c3ea3faef6b128d718cf8ba98721bVendor (CNA)
Linux Linux6901a4f795e0e8d65ae779cb37fc22e0bf294712Vendor (CNA)
Linux Linux69cc821e89ce572884548ac54c4f80eec7a837a5Vendor (CNA)
Linux Linuxa7e17a8d421ae23c920240625b4413c7b94d94a4Vendor (CNA)
Linux Linuxc5c8f6ffc942cf42f990f22e35bcf4cbe9d8c2fbVendor (CNA)
Linux Linuxdafd4c0b5e835db020cff11c74b4af9493a58e72Vendor (CNA)
Linux Linuxe2381174daeae0ca35eddffef02dcc8de8c1ef8aVendor (CNA)
debian:linux5.10.38-1 · Debian:12Package 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)

CWE-401 · Missing Release of Memory after Effective Lifetime

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 (7 more)

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

All records