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NVD / CVE Program· CNA Linux

CVE-2023-52448: gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump

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 067a7c48c2c70f05f9460d6f0e8423e234729f05, 5c28478af371a1c3fdb570ca67f110e1ae60fc37, 8877243beafa7c6bfc42022cbfdf9e39b25bd4fa.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 067a7c48c2c70f05f9460d6f0e8423e234729f05, 5c28478af371a1c3fdb570ca67f110e1ae60fc37, 8877243beafa7c6bfc42022cbfdf9e39b25bd4fa 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: gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump Syzkaller has reported a NULL pointer dereference when accessing rgd->rd_rgl in gfs2_rgrp_dump(). This can happen when creating rgd->rd_gl fails in read_rindex_entry(). Add a NULL pointer check in gfs2_rgrp_dump() to prevent that.

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

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

Follow CVE-2023-52448

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  • when exploit code appears or is weaponized
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  • 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 kernel4.20 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

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

    • 4.20affected
    • 72244b6bc752b5c496f09de9a13c18adc314a53c and later · before efc8ef87ab9185a23d5676f2f7d986022d91bcdeaffected · git
    • 72244b6bc752b5c496f09de9a13c18adc314a53c and later · before 5c28478af371a1c3fdb570ca67f110e1ae60fc37affected · git
    • 72244b6bc752b5c496f09de9a13c18adc314a53c and later · before ee0586d73cbaf0e7058bc640d62a9daf2dfa9178affected · git
    • 72244b6bc752b5c496f09de9a13c18adc314a53c and later · before d69d7804cf9e2ba171a27e5f98bc266f13d0414aaffected · git
    • 72244b6bc752b5c496f09de9a13c18adc314a53c and later · before 067a7c48c2c70f05f9460d6f0e8423e234729f05affected · git
    • 72244b6bc752b5c496f09de9a13c18adc314a53c and later · before c323efd620c741168c8e0cc6fc0be04ab57e331aaffected · git
    • 72244b6bc752b5c496f09de9a13c18adc314a53c and later · before 8877243beafa7c6bfc42022cbfdf9e39b25bd4faaffected · git
    • before 4.20not affected · semver
    • 5.4.268 and later · up to and including 5.4.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
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
openSUSE:Leap Micro 5.3kernel-default-basebefore 5.14.21-150400.24.111.2.150400.24.52.15.14.21-150400.24.111.2.150400.24.52.1

+96

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-2023-52445Feb 22, 2024 · media: pvrusb2: fix use after free on context disconnection
    31Monitor
  • ← EarlierCVE-2023-52446Feb 22, 2024 · bpf: Fix a race condition between btf_put() and map_free()
    31Monitor
  • Later →CVE-2023-52449Feb 22, 2024 · mtd: Fix gluebi NULL pointer dereference caused by ftl notifier
    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 Linux067a7c48c2c70f05f9460d6f0e8423e234729f05Vendor (CNA)
Linux Linux5c28478af371a1c3fdb570ca67f110e1ae60fc37Vendor (CNA)
Linux Linux8877243beafa7c6bfc42022cbfdf9e39b25bd4faVendor (CNA)
Linux Linuxc323efd620c741168c8e0cc6fc0be04ab57e331aVendor (CNA)
Linux Linuxd69d7804cf9e2ba171a27e5f98bc266f13d0414aVendor (CNA)
Linux Linuxee0586d73cbaf0e7058bc640d62a9daf2dfa9178Vendor (CNA)
Linux Linuxefc8ef87ab9185a23d5676f2f7d986022d91bcdeVendor (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)
red hat:bpftool0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)

+15

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-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