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NVD / CVE Program· CNA Linux

CVE-2023-53250: firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle

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: 0.14% (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 18e126e97c961f7a93823795c879d7c085fe5098, 4.10, 4.15.

Low priority for now. Upgrade to Linux Linux 18e126e97c961f7a93823795c879d7c085fe5098, 4.10, 4.15 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: firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle KASAN reported a null-ptr-deref error: KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 1373 Comm: modprobe Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:dmi_sysfs_entry_release ... Call Trace: <TASK> kobject_put dmi_sysfs_register_handle (drivers/firmware/dmi-sysfs.c:540) dmi_sysfs dmi_decode_table (drivers/firmware/dmi_scan.c:133) dmi_walk (drivers/firmware/dmi_scan.c:1115) dmi_sysfs_init (drivers/firmware/dmi-sysfs.c:149) dmi_sysfs do_one_initcall (init/main.c:1296) ... Kernel panic - not syncing: Fatal exception Kernel Offset: 0x4000000 from 0xffffffff81000000 ---[ end Kernel panic - not syncing: Fatal exception ]--- It is because previous patch added kobject_put() to release the memory which will call dmi_sysfs_entry_release() and list_del(). However, list_add_tail(entry->list) is called after the error block, so the list_head is uninitialized and cannot be deleted. Move error handling to after list_add_tail to fix this.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 15, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 4th 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 · 0.1%

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-2023-53250

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 kernel4.9.318 and later · before 4.10
  • linux linux kernel4.14.283 and later · before 4.15
  • linux linux kernel4.19.247 and later · before 4.20
  • linux linux kernel5.4.198 and later · before 5.5
  • linux linux kernel5.10.122 and later · before 5.11
  • linux linux kernel5.15.47 and later · before 5.15.99
  • linux linux kernel5.17.15 and later · before 5.18
  • linux linux kernel5.18.4 and later · before 6.1.16
  • linux linux kernel6.2 and later · before 6.2.3

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

    • a9bfb37d6ba7c376b0d53337a4c5f5ff324bd725, ed38d04342dfbe9e5aca745c8b5eb4188a74f0ef, c66cc3c62870a27ea8f060a7e4c1ad8d26dd3f0d, a724634b2a49f6ff0177a9e19a5a92fc1545e1b7, 985706bd3bbeffc8737bc05965ca8d24837bc7db, 3ba359ebe914ac3f8c6c832b28007c14c39d3766, ec752973aa721ee281d5441e497364637c626c7b, 5.19affected
    • fdffa4ad8f6bf1ece877edfb807f2b2c729d8578 and later · before b4fe158259fb5fead52ff2b55841ec5c39492604affected · git
    • 660ba678f9998aca6db74f2dd912fa5124f0fa31 and later · before e851996b32264e78a10863c2ac41a8689d7b9252affected · git
    • 660ba678f9998aca6db74f2dd912fa5124f0fa31 and later · before 5d0492d1d934642bdfd2057acc1b56f4b57be465affected · git
    • 660ba678f9998aca6db74f2dd912fa5124f0fa31 and later · before 18e126e97c961f7a93823795c879d7c085fe5098affected · git
    • 5.15.47 and later · before 5.15.99affected · semver
    • 4.9.318 and later · before 4.10affected · semver
    • 4.14.283 and later · before 4.15affected · semver
    • 4.19.247 and later · before 4.20affected · semver
    • 5.4.198 and later · before 5.5affected · 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-2023-53248Sep 15, 2025 · drm/amdgpu: install stub fence into potential unused fence pointers
    22Monitor
  • ← EarlierCVE-2023-53249Sep 15, 2025 · clk: imx: clk-imx8mn: fix memory leak in imx8mn_clocks_probe
    22Monitor
  • Later →CVE-2023-53251Sep 15, 2025 · wifi: iwlwifi: pcie: fix NULL pointer dereference in iwl_pcie_irq_rx_msix_handler()
    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 Linux18e126e97c961f7a93823795c879d7c085fe5098Vendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.15Vendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux5.11Vendor (CNA)
Linux Linux5.15.99Vendor (CNA)
Linux Linux5.18Vendor (CNA)
Linux Linux5.19Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux5d0492d1d934642bdfd2057acc1b56f4b57be465Vendor (CNA)
Linux Linuxb4fe158259fb5fead52ff2b55841ec5c39492604Vendor (CNA)
Linux Linuxe851996b32264e78a10863c2ac41a8689d7b9252Vendor (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.

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).

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 (3 more)

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

All records