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NVD / CVE Program· CNA Linux

CVE-2026-89982: i2c: mux: Fix channel node leak on adapter add failure

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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0927153f2abf48b6cc3e5f27063a17f7a8d47f38, 2b3b06cb709c4bf75a3fe3da3a0ca368ee3b40e5, 385c7af4e3b95d0769fd211831674e83b16a2ebf; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0927153f2abf48b6cc3e5f27063a17f7a8d47f38, 2b3b06cb709c4bf75a3fe3da3a0ca368ee3b40e5, 385c7af4e3b95d0769fd211831674e83b16a2ebf; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: i2c: mux: Fix channel node leak on adapter add failure i2c_mux_add_adapter() takes a reference to the Device Tree channel node before registering the new adapter. If adapter registration fails, the error path frees the private data without dropping that reference. Release the channel node before freeing the private data.

—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 19, 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%

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

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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.

—

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

    • 3.5affected
    • bc45449b1444611d68466ae7f45f235420d79019 and later · before 4f42f70afd2447f3c82ca69d1e03466a75348ba9affected · git
    • bc45449b1444611d68466ae7f45f235420d79019 and later · before 4c9bc46a2a4afb7a11c48d33bdf19febab431015affected · git
    • bc45449b1444611d68466ae7f45f235420d79019 and later · before dd2c1e6747b17b24ecddd48a7bb6bb964c2793d1affected · git
    • bc45449b1444611d68466ae7f45f235420d79019 and later · before 0927153f2abf48b6cc3e5f27063a17f7a8d47f38affected · git
    • bc45449b1444611d68466ae7f45f235420d79019 and later · before b580f062b24c4eef562f08f210c028adb34ef14eaffected · git
    • bc45449b1444611d68466ae7f45f235420d79019 and later · before 2b3b06cb709c4bf75a3fe3da3a0ca368ee3b40e5affected · git
    • bc45449b1444611d68466ae7f45f235420d79019 and later · before 694e7e6edf249723ca7d3ef77c2ca1badfc78dc4affected · git
    • bc45449b1444611d68466ae7f45f235420d79019 and later · before 385c7af4e3b95d0769fd211831674e83b16a2ebfaffected · git
    • before 3.5not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-89980Sep 16, 2026 · ALSA: harmony: initialize locks before requesting IRQ
    33Monitor
  • ← EarlierCVE-2026-89981Sep 16, 2026 · arm64: Don't read GMID_EL1 when MTE is disabled
    0Monitor
  • Later →CVE-2026-89983Sep 16, 2026 · i2c: core: fix debugfs UAF on adapter removal
    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 Linux0927153f2abf48b6cc3e5f27063a17f7a8d47f38Vendor (CNA)
Linux Linux2b3b06cb709c4bf75a3fe3da3a0ca368ee3b40e5Vendor (CNA)
Linux Linux385c7af4e3b95d0769fd211831674e83b16a2ebfVendor (CNA)
Linux Linux4c9bc46a2a4afb7a11c48d33bdf19febab431015Vendor (CNA)
Linux Linux4f42f70afd2447f3c82ca69d1e03466a75348ba9Vendor (CNA)
Linux Linux694e7e6edf249723ca7d3ef77c2ca1badfc78dc4Vendor (CNA)
Linux Linuxb580f062b24c4eef562f08f210c028adb34ef14eVendor (CNA)
Linux Linuxdd2c1e6747b17b24ecddd48a7bb6bb964c2793d1Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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✗ → ✓

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