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NVD / CVE Program· CNA Linux

CVE-2023-54168: RDMA/mlx4: Prevent shift wrapping in set_user_sq_size()

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.15% (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 196a6df08b08699ace4ce70e1efcdd9081b6565f, 3ce0df3493277b9df275cb8455d9c677ae701230, 3d5ae269c4bd392ec1edbfb3bd031b8f42d7feff.

Low priority for now. Upgrade to Linux Linux 196a6df08b08699ace4ce70e1efcdd9081b6565f, 3ce0df3493277b9df275cb8455d9c677ae701230, 3d5ae269c4bd392ec1edbfb3bd031b8f42d7feff 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: RDMA/mlx4: Prevent shift wrapping in set_user_sq_size() The ucmd->log_sq_bb_count variable is controlled by the user so this shift can wrap. Fix it by using check_shl_overflow() in the same way that it was done in commit 515f60004ed9 ("RDMA/hns: Prevent undefined behavior in hns_roce_set_user_sq_size()").

Published
Dec 30, 2025
Updated
Oct 15, 2026
EPSS
0.1% · 4th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

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  • 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.

—

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

    • 2.6.24affected
    • 839041329fd3410e07d614f81e75bb43367d8f89 and later · before 3d5ae269c4bd392ec1edbfb3bd031b8f42d7feffaffected · git
    • 839041329fd3410e07d614f81e75bb43367d8f89 and later · before 8feca625900777e02a449e53fe4121339934c38aaffected · git
    • 839041329fd3410e07d614f81e75bb43367d8f89 and later · before 9ad3221c86cc9c6305594b742d4a72dfbd4ea579affected · git
    • 839041329fd3410e07d614f81e75bb43367d8f89 and later · before 9911be2155720221a4f1f722b22bd0e2388d8bcfaffected · git
    • 839041329fd3410e07d614f81e75bb43367d8f89 and later · before 3ce0df3493277b9df275cb8455d9c677ae701230affected · git
    • 839041329fd3410e07d614f81e75bb43367d8f89 and later · before 196a6df08b08699ace4ce70e1efcdd9081b6565faffected · git
    • 839041329fd3410e07d614f81e75bb43367d8f89 and later · before a183905869e692b6b7805b7472235585eff8e429affected · git
    • 839041329fd3410e07d614f81e75bb43367d8f89 and later · before d50b3c73f1ac20dabc53dc6e9d64ce9c79a331ebaffected · git
    • before 2.6.24not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-defaultbefore 3.0.101-108.198.13.0.101-108.198.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-docsbefore 3.0.101-108.198.13.0.101-108.198.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-ec2before 3.0.101-108.198.13.0.101-108.198.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-sourcebefore 3.0.101-108.198.13.0.101-108.198.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-symsbefore 3.0.101-108.198.13.0.101-108.198.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-tracebefore 3.0.101-108.198.13.0.101-108.198.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-xenbefore 3.0.101-108.198.13.0.101-108.198.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2022-50885Dec 30, 2025 · RDMA/rxe: Fix NULL-ptr-deref in rxe_qp_do_cleanup() when socket create failed
    30Monitor
  • ← EarlierCVE-2023-54164Dec 30, 2025 · Bluetooth: ISO: fix iso_conn related locking and validity issues
    32Monitor
  • Later →CVE-2023-54173Dec 30, 2025 · bpf: Disable preemption in bpf_event_output
    31Monitor

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 Linux196a6df08b08699ace4ce70e1efcdd9081b6565fVendor (CNA)
Linux Linux3ce0df3493277b9df275cb8455d9c677ae701230Vendor (CNA)
Linux Linux3d5ae269c4bd392ec1edbfb3bd031b8f42d7feffVendor (CNA)
Linux Linux8feca625900777e02a449e53fe4121339934c38aVendor (CNA)
Linux Linux9911be2155720221a4f1f722b22bd0e2388d8bcfVendor (CNA)
Linux Linux9ad3221c86cc9c6305594b742d4a72dfbd4ea579Vendor (CNA)
Linux Linuxa183905869e692b6b7805b7472235585eff8e429Vendor (CNA)
Linux Linuxd50b3c73f1ac20dabc53dc6e9d64ce9c79a331ebVendor (CNA)
debian:linux6.1.37-1 · Debian:12Package registry (OSV)
suse:kernel-default3.0.101-108.198.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-docs3.0.101-108.198.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-ec23.0.101-108.198.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-source3.0.101-108.198.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-syms3.0.101-108.198.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-trace3.0.101-108.198.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-xen3.0.101-108.198.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage 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
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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. SSVC exploitation— → none
  2. 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