NVD / CVE Program· CNA Linux

CVE-2026-53323: net: dsa: remove redundant netdev_lock_ops() from conduit ethtool ops

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: 0.12% (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 0f99e0c3e19badaf3fdced0d3feba623e59eed41, 74d64ae4254e99ef8c8215b057a76edac82c5f99, abe91fd045874d21834482adcd7a9693e7377056.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0f99e0c3e19badaf3fdced0d3feba623e59eed41, 74d64ae4254e99ef8c8215b057a76edac82c5f99, abe91fd045874d21834482adcd7a9693e7377056 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: dsa: remove redundant netdev_lock_ops() from conduit ethtool ops DSA replaces the conduit (master) device's ethtool_ops with its own wrappers that aggregate stats from both the conduit and DSA switch ports. Taking the lock again inside the DSA wrappers causes a deadlock. Stumbled upon this when booting qemu with fbnic and CONFIG_NET_DSA_LOOP=y (which looks like some kind of testing device that auto-populates the ports of eth0). `ethtool -i` is enough to deadlock. This means we have basically zero coverage for DSA stuff with real ops locked devs. Remove the redundant netdev_lock_ops()/netdev_unlock_ops() calls from the DSA conduit ethtool wrappers.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Denial of service

Published: Jun 26, 2026
Updated: Jul 6, 2026
EPSS: 0.1% · 2th percentile
CWE: CWE-667

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

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No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

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

linux linux kernel6.15 and later · before 6.18.33
linux linux kernel6.19 and later · before 7.0.10

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
- 6.15affected
- 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 and later · before 74d64ae4254e99ef8c8215b057a76edac82c5f99affected · git
- 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 and later · before abe91fd045874d21834482adcd7a9693e7377056affected · git
- 2bcf4772e45adb00649a4e9cbff14b08a144f9e3 and later · before 0f99e0c3e19badaf3fdced0d3feba623e59eed41affected · git
- before 6.15not affected · semver
- 6.18.33 and later · up to and including 6.18.*not affected · semver
- 7.0.10 and later · up to and including 7.0.*not affected · semver
- 7.1 and laternot affected · original_commit_for_fix

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:14	linux	before 7.0.10-1	7.0.10-1

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-2026-53320Jun 26, 2026 · nilfs2: reject zero bd_oblocknr in nilfs_ioctl_mark_blocks_dirty()
22Monitor
← EarlierCVE-2026-53322Jun 26, 2026 · vfio/pci: Clean up DMABUFs before disabling function
35Monitor
Later →CVE-2026-53324Jun 26, 2026 · net: mana: Use pci_name() for debugfs directory naming
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 / package	Fixed version	Source
Linux Linux	0f99e0c3e19badaf3fdced0d3feba623e59eed41	Vendor (CNA)
Linux Linux	74d64ae4254e99ef8c8215b057a76edac82c5f99	Vendor (CNA)
Linux Linux	abe91fd045874d21834482adcd7a9693e7377056	Vendor (CNA)
debian:linux	7.0.10-1 · Debian:14	Package 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).