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NVD / CVE Program· CNA Linux

CVE-2023-52449: mtd: Fix gluebi NULL pointer dereference caused by ftl notifier

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: 0.24% (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 001a3f59d8c914ef8273461d4bf495df384cc5f8, 1bf4fe14e97cda621522eb2f28b0a4e87c5b0745, 5389407bba1eab1266c6d83e226fb0840cb98dd5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 001a3f59d8c914ef8273461d4bf495df384cc5f8, 1bf4fe14e97cda621522eb2f28b0a4e87c5b0745, 5389407bba1eab1266c6d83e226fb0840cb98dd5 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: mtd: Fix gluebi NULL pointer dereference caused by ftl notifier If both ftl.ko and gluebi.ko are loaded, the notifier of ftl triggers NULL pointer dereference when trying to access ‘gluebi->desc’ in gluebi_read(). ubi_gluebi_init ubi_register_volume_notifier ubi_enumerate_volumes ubi_notify_all gluebi_notify nb->notifier_call() gluebi_create mtd_device_register mtd_device_parse_register add_mtd_device blktrans_notify_add not->add() ftl_add_mtd tr->add_mtd() scan_header mtd_read mtd_read_oob mtd_read_oob_std gluebi_read mtd->read() gluebi->desc - NULL Detailed reproduction information available at the Link [1], In the normal case, obtain gluebi->desc in the gluebi_get_device(), and access gluebi->desc in the gluebi_read(). However, gluebi_get_device() is not executed in advance in the ftl_add_mtd() process, which leads to NULL pointer dereference. The solution for the gluebi module is to run jffs2 on the UBI volume without considering working with ftl or mtdblock [2]. Therefore, this problem can be avoided by preventing gluebi from creating the mtdblock device after creating mtd partition of the type MTD_UBIVOLUME.

Published
Feb 22, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 15th 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

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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

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

    • 2.6.31affected
    • 2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba and later · before aeba358bcc8ffddf9b4a9bd0e5ec9eb338d46022affected · git
    • 2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba and later · before 1bf4fe14e97cda621522eb2f28b0a4e87c5b0745affected · git
    • 2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba and later · before 001a3f59d8c914ef8273461d4bf495df384cc5f8affected · git
    • 2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba and later · before d8ac2537763b54d278b80b2b080e1652523c7d4caffected · git
    • 2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba and later · before 5389407bba1eab1266c6d83e226fb0840cb98dd5affected · git
    • 2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba and later · before cfd7c9d260dc0a3baaea05a122a19ab91e193c65affected · git
    • 2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba and later · before b36aaa64d58aaa2f2cbc8275e89bae76a2b6c3dcaffected · git
    • 2ba3d76a1e29f2ba64fbc762875cf9fb2d4ba2ba and later · before a43bdc376deab5fff1ceb93dca55bcab8dbdc1d6affected · git
    • before 2.6.31not affected · semver
Affected versions · NVD (7)

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

  • linux linux kernel2.6.31 and later · before 4.19.306
  • linux linux kernel4.20 and later · before 5.4.268
  • linux linux kernel5.5.0 and later · before 5.10.209
  • linux linux kernel5.11.0 and later · before 5.15.148
  • linux linux kernel5.16.0 and later · before 6.1.75
  • linux linux kernel6.2.0 and later · before 6.6.14
  • linux linux kernel6.7.0 and later · before 6.7.2

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:10linuxbefore 4.19.316-14.19.316-1
Debian:10linux-5.10before 5.10.209-2~deb10u15.10.209-2~deb10u1
Debian:12linuxbefore 6.1.76-16.1.76-1
Debian:13linuxbefore 6.6.15-16.6.15-1
openSUSE:Leap 15.5dtb-aarch64before 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-64kbbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-azurebefore 5.14.21-150500.33.37.15.14.21-150500.33.37.1
openSUSE:Leap 15.5kernel-debugbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-defaultbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-default-basebefore 5.14.21-150500.55.52.1.150500.6.23.15.14.21-150500.55.52.1.150500.6.23.1
openSUSE:Leap 15.5kernel-docsbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-kvmsmallbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-obs-buildbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-obs-qabefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-rtbefore 5.14.21-150500.13.38.15.14.21-150500.13.38.1
openSUSE:Leap 15.5kernel-rt_debugbefore 5.14.21-150500.13.38.15.14.21-150500.13.38.1
openSUSE:Leap 15.5kernel-sourcebefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-source-azurebefore 5.14.21-150500.33.37.15.14.21-150500.33.37.1
openSUSE:Leap 15.5kernel-source-rtbefore 5.14.21-150500.13.38.15.14.21-150500.13.38.1
openSUSE:Leap 15.5kernel-symsbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-syms-azurebefore 5.14.21-150500.33.37.15.14.21-150500.33.37.1
openSUSE:Leap 15.5kernel-syms-rtbefore 5.14.21-150500.13.38.15.14.21-150500.13.38.1
openSUSE:Leap 15.5kernel-zfcpdumpbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap Micro 5.3kernel-defaultbefore 5.14.21-150400.24.111.25.14.21-150400.24.111.2

+37

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-2023-52446Feb 22, 2024 · bpf: Fix a race condition between btf_put() and map_free()
    31Monitor
  • ← EarlierCVE-2023-52448Feb 22, 2024 · gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump
    22Monitor
  • Later →CVE-2023-52450Feb 22, 2024 · perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology()
    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 Linux001a3f59d8c914ef8273461d4bf495df384cc5f8Vendor (CNA)
Linux Linux1bf4fe14e97cda621522eb2f28b0a4e87c5b0745Vendor (CNA)
Linux Linux5389407bba1eab1266c6d83e226fb0840cb98dd5Vendor (CNA)
Linux Linuxa43bdc376deab5fff1ceb93dca55bcab8dbdc1d6Vendor (CNA)
Linux Linuxaeba358bcc8ffddf9b4a9bd0e5ec9eb338d46022Vendor (CNA)
Linux Linuxb36aaa64d58aaa2f2cbc8275e89bae76a2b6c3dcVendor (CNA)
Linux Linuxcfd7c9d260dc0a3baaea05a122a19ab91e193c65Vendor (CNA)
Linux Linuxd8ac2537763b54d278b80b2b080e1652523c7d4cVendor (CNA)
debian:linux6.1.76-1 · Debian:12Package registry (OSV)
debian:linux-5.105.10.209-2~deb10u1 · Debian:10Package registry (OSV)
opensuse:dtb-aarch645.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-64kb5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-debug5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-default5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-default-base5.14.21-150500.55.52.1.150500.6.23.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-docs5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-kvmsmall5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-obs-build5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-obs-qa5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-source-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-syms-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
suse:kernel-64kb5.14.21-150500.55.52.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP5Package registry (OSV)
suse:kernel-azure5.14.21-150500.33.37.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-default5.14.21-150500.55.52.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-default-base5.14.21-150500.55.52.1.150500.6.23.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-docs5.14.21-150500.55.52.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:kernel-livepatch-SLE15-SP5_Update_111-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5Package registry (OSV)
suse:kernel-obs-build5.14.21-150500.55.52.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:kernel-source5.14.21-150500.55.52.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP5Package registry (OSV)

+4

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.

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

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

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-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.

References

Show all references (9 more)

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

All records