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NVD / CVE Program· CNA Linux

CVE-2025-21975: net/mlx5: handle errors in mlx5_chains_create_table()

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: 0.21% (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 093b4aaec97ec048623e3fe1e516fc45a954d412, 1598307c914ba3d2642a2b03d1ff11efbdb7c6c2, 15bdd93728369b2c8942a8e5d549d4b5dc04a2d9.

Low priority for now. Upgrade to Linux Linux 093b4aaec97ec048623e3fe1e516fc45a954d412, 1598307c914ba3d2642a2b03d1ff11efbdb7c6c2, 15bdd93728369b2c8942a8e5d549d4b5dc04a2d9 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: net/mlx5: handle errors in mlx5_chains_create_table() In mlx5_chains_create_table(), the return value of mlx5_get_fdb_sub_ns() and mlx5_get_flow_namespace() must be checked to prevent NULL pointer dereferences. If either function fails, the function should log error message with mlx5_core_warn() and return error pointer.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 1, 2025
Updated
Nov 5, 2026
EPSS
0.2% · 11th 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-2025-21975

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 kernel5.6 and later · before 5.10.236
  • linux linux kernel5.11 and later · before 5.15.180
  • linux linux kernel5.16 and later · before 6.1.132
  • linux linux kernel6.2 and later · before 6.6.84
  • linux linux kernel6.7 and later · before 6.12.20
  • linux linux kernel6.13 and later · before 6.13.8
  • linux linux kernel6.14

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

    • 5.6affected
    • 39ac237ce00968545e7298faa9e07ecb7e440fb5 and later · before 15bdd93728369b2c8942a8e5d549d4b5dc04a2d9affected · git
    • 39ac237ce00968545e7298faa9e07ecb7e440fb5 and later · before 29c419c64e9b396baeda1d8713d2aa3ba7c0acf6affected · git
    • 39ac237ce00968545e7298faa9e07ecb7e440fb5 and later · before 1598307c914ba3d2642a2b03d1ff11efbdb7c6c2affected · git
    • 39ac237ce00968545e7298faa9e07ecb7e440fb5 and later · before 637105ef0d46fe5beac15aceb431da3ec832bb00affected · git
    • 39ac237ce00968545e7298faa9e07ecb7e440fb5 and later · before 1d34296409a519b4027750e3e82d9e19553a7398affected · git
    • 39ac237ce00968545e7298faa9e07ecb7e440fb5 and later · before 093b4aaec97ec048623e3fe1e516fc45a954d412affected · git
    • 39ac237ce00968545e7298faa9e07ecb7e440fb5 and later · before eab0396353be1c778eba1c0b5180176f04dd21ceaffected · git
    • before 5.6not affected · semver
    • 5.10.236 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 6.1.133-16.1.133-1
Debian:13linuxbefore 6.12.20-16.12.20-1

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-2025-21973Apr 1, 2025 · eth: bnxt: fix kernel panic in the bnxt_get_queue_stats{rx | tx}
    28Monitor
  • ← EarlierCVE-2025-21974Apr 1, 2025 · eth: bnxt: return fail if interface is down in bnxt_queue_mem_alloc()
    22Monitor
  • Later →CVE-2025-21976Apr 1, 2025 · fbdev: hyperv_fb: Allow graceful removal of framebuffer
    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 Linux093b4aaec97ec048623e3fe1e516fc45a954d412Vendor (CNA)
Linux Linux1598307c914ba3d2642a2b03d1ff11efbdb7c6c2Vendor (CNA)
Linux Linux15bdd93728369b2c8942a8e5d549d4b5dc04a2d9Vendor (CNA)
Linux Linux1d34296409a519b4027750e3e82d9e19553a7398Vendor (CNA)
Linux Linux29c419c64e9b396baeda1d8713d2aa3ba7c0acf6Vendor (CNA)
Linux Linux637105ef0d46fe5beac15aceb431da3ec832bb00Vendor (CNA)
Linux Linuxeab0396353be1c778eba1c0b5180176f04dd21ceVendor (CNA)
debian:linux6.1.133-1 · 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. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

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

All records