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NVD / CVE Program· CNA Linux

CVE-2023-53346: kernel/fail_function: fix memory leak with using debugfs_lookup()

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: 0.20% (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 29d53c4c5a6f6d2b93aaac95b65cb4c907faf2ff, 2bb3669f576559db273efe49e0e69f82450efbca, 94f68f3e059c478e240f65fcb64746fe371295df.

Low priority for now. Upgrade to Linux Linux 29d53c4c5a6f6d2b93aaac95b65cb4c907faf2ff, 2bb3669f576559db273efe49e0e69f82450efbca, 94f68f3e059c478e240f65fcb64746fe371295df 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: kernel/fail_function: fix memory leak with using debugfs_lookup() When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 17, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 10th 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-2023-53346

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 kernelbefore 5.4.235
  • linux linux kernel5.5 and later · before 5.10.173
  • linux linux kernel5.11 and later · before 5.15.100
  • linux linux kernel5.16 and later · before 6.1.18
  • linux linux kernel6.2 and later · before 6.2.5

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

    • 4.16affected
    • 4b1a29a7f5425d32640b34b8a755f34e02f64d0f and later · before f6d3aee1c66358471275df9dddd480010f061b0eaffected · git
    • 4b1a29a7f5425d32640b34b8a755f34e02f64d0f and later · before dd9981a11d74ff2eb253bb5c459876f8bd3c6c36affected · git
    • 4b1a29a7f5425d32640b34b8a755f34e02f64d0f and later · before bb99db06b8b6ce9351633fc61bec9919d8f6f52baffected · git
    • 4b1a29a7f5425d32640b34b8a755f34e02f64d0f and later · before 29d53c4c5a6f6d2b93aaac95b65cb4c907faf2ffaffected · git
    • 4b1a29a7f5425d32640b34b8a755f34e02f64d0f and later · before 94f68f3e059c478e240f65fcb64746fe371295dfaffected · git
    • 4b1a29a7f5425d32640b34b8a755f34e02f64d0f and later · before 2bb3669f576559db273efe49e0e69f82450efbcaaffected · git
    • before 4.16not affected · semver
    • 5.4.235 and later · up to and including 5.4.*not affected · semver
    • 5.10.173 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.20-16.1.20-1

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-2023-53344Sep 17, 2025 · can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write
    22Monitor
  • ← EarlierCVE-2023-53345Sep 17, 2025 · rxrpc: Fix potential data race in rxrpc_wait_to_be_connected()
    18Monitor
  • Later →CVE-2023-53347Sep 17, 2025 · net/mlx5: Handle pairing of E-switch via uplink un/load APIs
    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 Linux29d53c4c5a6f6d2b93aaac95b65cb4c907faf2ffVendor (CNA)
Linux Linux2bb3669f576559db273efe49e0e69f82450efbcaVendor (CNA)
Linux Linux94f68f3e059c478e240f65fcb64746fe371295dfVendor (CNA)
Linux Linuxbb99db06b8b6ce9351633fc61bec9919d8f6f52bVendor (CNA)
Linux Linuxdd9981a11d74ff2eb253bb5c459876f8bd3c6c36Vendor (CNA)
Linux Linuxf6d3aee1c66358471275df9dddd480010f061b0eVendor (CNA)
debian:linux6.1.20-1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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).

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 (5 more)

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

All records