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NVD / CVE Program· CNA Linux

CVE-2026-72308: mlxsw: fix refcount leak in mlxsw_sp_port_lag_join()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 1cf8a1af42b1f12a30b7abd34fe4fc23b3170e7e, 2d8b3c3e129973a51ae924bdcf6993a76b828814, 3fbeaa8ecd144ad593f9fa1ab4b40a780ad3700b.

Low priority for now. Upgrade to Linux Linux 1cf8a1af42b1f12a30b7abd34fe4fc23b3170e7e, 2d8b3c3e129973a51ae924bdcf6993a76b828814, 3fbeaa8ecd144ad593f9fa1ab4b40a780ad3700b 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: mlxsw: fix refcount leak in mlxsw_sp_port_lag_join() When mlxsw_sp_port_lag_index_get() fails, mlxsw_sp_port_lag_join() returns an error without releasing the lag reference obtained by the earlier mlxsw_sp_lag_get(). All other error paths in the function jump to the cleanup label that ends with mlxsw_sp_lag_put(), so this is a single missed release. Fix the leak by replacing the bare 'return err' with a goto to the existing error cleanup label, which will drop the reference safely.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 23, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • 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.

—

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

    • 4.5affected
    • 0d65fc13042fce6a2d6de58ff0dc9531e8523c07 and later · before 3fbeaa8ecd144ad593f9fa1ab4b40a780ad3700baffected · git
    • 0d65fc13042fce6a2d6de58ff0dc9531e8523c07 and later · before 99ff5b0083eae6f774360c4ea6874604e6c9b553affected · git
    • 0d65fc13042fce6a2d6de58ff0dc9531e8523c07 and later · before 9bf2d6eea26a226f8ebab7baea6f2b018f914560affected · git
    • 0d65fc13042fce6a2d6de58ff0dc9531e8523c07 and later · before 8b3350eacd9df0597bfe36a594df7b9def0b3edfaffected · git
    • 0d65fc13042fce6a2d6de58ff0dc9531e8523c07 and later · before 1cf8a1af42b1f12a30b7abd34fe4fc23b3170e7eaffected · git
    • 0d65fc13042fce6a2d6de58ff0dc9531e8523c07 and later · before 2d8b3c3e129973a51ae924bdcf6993a76b828814affected · git
    • 0d65fc13042fce6a2d6de58ff0dc9531e8523c07 and later · before cab468c3c03f4bcd7530ce2783a4140da14efb7baffected · git
    • 0d65fc13042fce6a2d6de58ff0dc9531e8523c07 and later · before 41c8c1d65b32beacd8d916a22457b4f6e47f45afaffected · git
    • before 4.5not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-72306Aug 15, 2026 · vduse: Fix race in vduse_dev_msg_sync and vduse_dev_read_iter
    0Monitor
  • ← EarlierCVE-2026-72307Aug 15, 2026 · mlxsw: fix refcount leak in mlxsw_sp_vrs_lpm_tree_replace()
    0Monitor
  • Later →CVE-2026-72309Aug 15, 2026 · tracing/remotes: Fix leak in trace_remote_alloc_buffer() error path
    0Monitor

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 Linux1cf8a1af42b1f12a30b7abd34fe4fc23b3170e7eVendor (CNA)
Linux Linux2d8b3c3e129973a51ae924bdcf6993a76b828814Vendor (CNA)
Linux Linux3fbeaa8ecd144ad593f9fa1ab4b40a780ad3700bVendor (CNA)
Linux Linux41c8c1d65b32beacd8d916a22457b4f6e47f45afVendor (CNA)
Linux Linux8b3350eacd9df0597bfe36a594df7b9def0b3edfVendor (CNA)
Linux Linux99ff5b0083eae6f774360c4ea6874604e6c9b553Vendor (CNA)
Linux Linux9bf2d6eea26a226f8ebab7baea6f2b018f914560Vendor (CNA)
Linux Linuxcab468c3c03f4bcd7530ce2783a4140da14efb7bVendor (CNA)
debian:linux6.1.187-1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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✗ → ✓

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References

Show all references (7 more)

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

All records