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Noroxi
NVD / CVE Program· CNA Linux

CVE-2023-52631: fs/ntfs3: Fix an NULL dereference bug

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: 0.22% (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 686820fe141ea0220fc6fdfc7e5694f915cf64b2, ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b, b2dd7b953c25ffd5912dda17e980e7168bebcf6c.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 686820fe141ea0220fc6fdfc7e5694f915cf64b2, ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b, b2dd7b953c25ffd5912dda17e980e7168bebcf6c 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: fs/ntfs3: Fix an NULL dereference bug The issue here is when this is called from ntfs_load_attr_list(). The "size" comes from le32_to_cpu(attr->res.data_size) so it can't overflow on a 64bit systems but on 32bit systems the "+ 1023" can overflow and the result is zero. This means that the kmalloc will succeed by returning the ZERO_SIZE_PTR and then the memcpy() will crash with an Oops on the next line.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 2, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 13th 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.

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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 kernel5.15 and later · before 5.15.149
  • linux linux kernel5.16 and later · before 6.1.78
  • linux linux kernel6.2 and later · before 6.6.17
  • linux linux kernel6.7 and later · before 6.7.5
  • linux linux kernel6.8

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

    • 5.15affected
    • be71b5cba2e6485e8959da7a9f9a44461a1bb074 and later · before ae4acad41b0f93f1c26cc0fc9135bb79d8282d0baffected · git
    • be71b5cba2e6485e8959da7a9f9a44461a1bb074 and later · before ec1bedd797588fe38fc11cba26d77bb1d9b194c6affected · git
    • be71b5cba2e6485e8959da7a9f9a44461a1bb074 and later · before fb7bcd1722bc9bc55160378f5f99c01198fd14a7affected · git
    • be71b5cba2e6485e8959da7a9f9a44461a1bb074 and later · before 686820fe141ea0220fc6fdfc7e5694f915cf64b2affected · git
    • be71b5cba2e6485e8959da7a9f9a44461a1bb074 and later · before b2dd7b953c25ffd5912dda17e980e7168bebcf6caffected · git
    • before 5.15not affected · semver
    • 5.15.149 and later · up to and including 5.15.*not affected · semver
    • 6.1.78 and later · up to and including 6.1.*not affected · semver
    • 6.6.17 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.82-16.1.82-1
Debian:13linuxbefore 6.7.7-16.7.7-1
openSUSE:Leap 15.6dtb-aarch64before 6.4.0-150600.23.7.16.4.0-150600.23.7.1
openSUSE:Leap 15.6kernel-64kbbefore 6.4.0-150600.23.7.36.4.0-150600.23.7.3
openSUSE:Leap 15.6kernel-azurebefore 6.4.0-150600.8.5.46.4.0-150600.8.5.4
openSUSE:Leap 15.6kernel-debugbefore 6.4.0-150600.23.7.36.4.0-150600.23.7.3
openSUSE:Leap 15.6kernel-defaultbefore 6.4.0-150600.23.7.36.4.0-150600.23.7.3
openSUSE:Leap 15.6kernel-default-basebefore 6.4.0-150600.23.7.3.150600.12.2.76.4.0-150600.23.7.3.150600.12.2.7
openSUSE:Leap 15.6kernel-docsbefore 6.4.0-150600.23.7.46.4.0-150600.23.7.4
openSUSE:Leap 15.6kernel-kvmsmallbefore 6.4.0-150600.23.7.36.4.0-150600.23.7.3
openSUSE:Leap 15.6kernel-obs-buildbefore 6.4.0-150600.23.7.36.4.0-150600.23.7.3
openSUSE:Leap 15.6kernel-obs-qabefore 6.4.0-150600.23.7.16.4.0-150600.23.7.1
openSUSE:Leap 15.6kernel-rtbefore 6.4.0-150600.10.5.16.4.0-150600.10.5.1
openSUSE:Leap 15.6kernel-rt_debugbefore 6.4.0-150600.10.5.16.4.0-150600.10.5.1
openSUSE:Leap 15.6kernel-sourcebefore 6.4.0-150600.23.7.26.4.0-150600.23.7.2
openSUSE:Leap 15.6kernel-source-azurebefore 6.4.0-150600.8.5.46.4.0-150600.8.5.4
openSUSE:Leap 15.6kernel-source-rtbefore 6.4.0-150600.10.5.16.4.0-150600.10.5.1
openSUSE:Leap 15.6kernel-symsbefore 6.4.0-150600.23.7.16.4.0-150600.23.7.1
openSUSE:Leap 15.6kernel-syms-azurebefore 6.4.0-150600.8.5.16.4.0-150600.8.5.1
openSUSE:Leap 15.6kernel-syms-rtbefore 6.4.0-150600.10.5.16.4.0-150600.10.5.1
openSUSE:Leap 15.6kernel-zfcpdumpbefore 6.4.0-150600.23.7.36.4.0-150600.23.7.3
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_1before 1-150600.13.3.71-150600.13.3.7
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6-RT_Update_1before 1-150600.1.5.11-150600.1.5.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6kernel-64kbbefore 6.4.0-150600.23.7.36.4.0-150600.23.7.3

+18

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-2024-26654Apr 1, 2024 · ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs
    28Monitor
  • ← EarlierCVE-2024-26655Apr 1, 2024 · Fix memory leak in posix_clock_open()
    22Monitor
  • Later →CVE-2023-52632Apr 2, 2024 · drm/amdkfd: Fix lock dependency warning with srcu
    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 Linux686820fe141ea0220fc6fdfc7e5694f915cf64b2Vendor (CNA)
Linux Linuxae4acad41b0f93f1c26cc0fc9135bb79d8282d0bVendor (CNA)
Linux Linuxb2dd7b953c25ffd5912dda17e980e7168bebcf6cVendor (CNA)
Linux Linuxec1bedd797588fe38fc11cba26d77bb1d9b194c6Vendor (CNA)
Linux Linuxfb7bcd1722bc9bc55160378f5f99c01198fd14a7Vendor (CNA)
debian:linux6.1.82-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.4.0-150600.23.7.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-64kb6.4.0-150600.23.7.3 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-azure6.4.0-150600.8.5.4 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-debug6.4.0-150600.23.7.3 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default6.4.0-150600.23.7.3 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-default-base6.4.0-150600.23.7.3.150600.12.2.7 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-docs6.4.0-150600.23.7.4 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-kvmsmall6.4.0-150600.23.7.3 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-build6.4.0-150600.23.7.3 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-obs-qa6.4.0-150600.23.7.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-source-azure6.4.0-150600.8.5.4 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kernel-syms-azure6.4.0-150600.8.5.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:kernel-64kb6.4.0-150600.23.7.3 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-azure6.4.0-150600.8.5.4 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)
suse:kernel-default6.4.0-150600.23.7.3 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-default-base6.4.0-150600.23.7.3.150600.12.2.7 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-docs6.4.0-150600.23.7.4 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_11-150600.13.3.7 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-obs-build6.4.0-150600.23.7.3 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-source6.4.0-150600.23.7.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:kernel-source-azure6.4.0-150600.8.5.4 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)
suse:kernel-syms6.4.0-150600.23.7.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6Package registry (OSV)
suse:kernel-syms-azure6.4.0-150600.8.5.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6Package registry (OSV)
suse:kernel-zfcpdump6.4.0-150600.23.7.3 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package 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-476 · NULL Pointer Dereference

CVSS vector

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

nvd-secondary

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 (4 more)

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

All records