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NVD / CVE Program· CNA Linux

CVE-2026-89740: serial: imx: serialize imx_uart_ports[] lifetime

—No exploit Fix available

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 28b932202fcdbeb2ef58d89ce4363f480433c234, 681696ae9e4a28bdf54893c807dfe4a6c08e30a5, 7429dce56a73bc080a8c072edb167106f73a08ae; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 6.6.161.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 28b932202fcdbeb2ef58d89ce4363f480433c234, 681696ae9e4a28bdf54893c807dfe4a6c08e30a5, 7429dce56a73bc080a8c072edb167106f73a08ae; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 6.6.161.1-1 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: serial: imx: serialize imx_uart_ports[] lifetime imx_uart_probe() publishes its devm-allocated port in imx_uart_ports[] before uart_add_one_port() because console setup uses the table. The entry is not cleared when adding the port fails or after removal, leaving a dangling pointer. A sibling probe can register the shared console through that stale entry. This was reproduced under KASAN on QEMU mcimx6ul-evk by unbinding a sibling UART, unbinding the console UART and rebinding the sibling. Keep the entry valid through uart_remove_one_port(), then clear it. Protect port addition and removal together with their table updates so sibling operations cannot interleave. Reject an occupied slot rather than clobbering an active port during a duplicate-line probe.

Published
Sep 11, 2026
Updated
Oct 30, 2026
EPSS
0.2% · 13th 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 exploit code appears or is weaponized
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  • 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

    • 2.6.27affected
    • dbff4e9ea2e83fda89143389bfb229cb29425a32 and later · before ce9c074868d5c8adfb0c72de4324138d6fa1a1a8affected · git
    • dbff4e9ea2e83fda89143389bfb229cb29425a32 and later · before a4acf2739434a014cdfc282175cffd3e35a97fa4affected · git
    • dbff4e9ea2e83fda89143389bfb229cb29425a32 and later · before abc17fd508a511669997e48f8b014d8aa043abdfaffected · git
    • dbff4e9ea2e83fda89143389bfb229cb29425a32 and later · before 681696ae9e4a28bdf54893c807dfe4a6c08e30a5affected · git
    • dbff4e9ea2e83fda89143389bfb229cb29425a32 and later · before 28b932202fcdbeb2ef58d89ce4363f480433c234affected · git
    • dbff4e9ea2e83fda89143389bfb229cb29425a32 and later · before 7429dce56a73bc080a8c072edb167106f73a08aeaffected · git
    • dbff4e9ea2e83fda89143389bfb229cb29425a32 and later · before 8b0b29fdcb47907ae0296b8fe829e918e05e300faffected · git
    • before 2.6.27not affected · semver
    • 5.15.224 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
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-2026-89738Sep 11, 2026 · usb: gadget: at91_udc: drain polled-VBUS timer/work before udc is freed
    31Monitor
  • ← EarlierCVE-2026-89739Sep 11, 2026 · usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition
    0Monitor
  • Later →CVE-2026-89741Sep 11, 2026 · Revert "media: v4l2-dev: fix error handling in __video_register_device()"
    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 Linux28b932202fcdbeb2ef58d89ce4363f480433c234Vendor (CNA)
Linux Linux681696ae9e4a28bdf54893c807dfe4a6c08e30a5Vendor (CNA)
Linux Linux7429dce56a73bc080a8c072edb167106f73a08aeVendor (CNA)
Linux Linux8b0b29fdcb47907ae0296b8fe829e918e05e300fVendor (CNA)
Linux Linuxa4acf2739434a014cdfc282175cffd3e35a97fa4Vendor (CNA)
Linux Linuxabc17fd508a511669997e48f8b014d8aa043abdfVendor (CNA)
Linux Linuxce9c074868d5c8adfb0c72de4324138d6fa1a1a8Vendor (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 3.0—Microsoft (MSRC)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.06.6.161.1-1 · Release NotesMicrosoft (MSRC)
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).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.

References

Show all references (6 more)

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

All records