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NVD / CVE Program· CNA Linux

CVE-2026-93081: firmware: arm_scmi: Fix SCMI device destroy lifetimes

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: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 5.16, 6.12.114, 6.15.

Low priority for now. Upgrade to Linux Linux 5.16, 6.12.114, 6.15 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: firmware: arm_scmi: Fix SCMI device destroy lifetimes scmi_child_dev_find() drops the reference returned by device_find_child() before returning the scmi_device pointer. A concurrent unregister can then release the device while the destroy path is still using the returned pointer. Make the lookup helper return the device_find_child() reference and keep it until scmi_device_destroy() has finished unregistering the child. Also split device_unregister() in __scmi_device_destroy() so the SCMI bus ID is not made reusable until after device_del() has removed the old scmi_dev.N name from sysfs. This avoids a new SCMI device reusing the same ID while the old device is still registered. The final device release callback is also a possible cleanup path when SCMI children are deleted by driver core recursion rather than __scmi_device_destroy(). Release the SCMI bus ID from a common helper used by destroy, register-failure and final-release paths, and clear scmi_dev->id after freeing it so the final release cannot free the same ID again.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 21, 2026
EPSS
0.2% · 9th 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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  • 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.

—

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

    • 91ff1e9652fb9beb0174267d6bb38243dff211bb, ff4273d47da81b95ed9396110bcbd1b7b7470fe8, 8a8a3547d5c4960da053df49c75bf623827a25da, 6.15affected
    • 2fbf6c9695ad9f05e7e5c166bf43fac7cb3276b3 and later · before d8ecdceeb90cd2c265b222a7b65487faf68fea73affected · git
    • 969d8beaa2e374387bf9aa5602ef84fc50bb48d8 and later · before 916e27f71a80f6d77c48d1a1a5782d6d5ef9017caffected · git
    • 9ca67840c0ddf3f39407339624cef824a4f27599 and later · before a60bc2df2d323cc1342f0cf95563cae266801e20affected · git
    • 9ca67840c0ddf3f39407339624cef824a4f27599 and later · before c59b3393df1348a12308aaabd5fbc58ed6b21cf5affected · git
    • 9ca67840c0ddf3f39407339624cef824a4f27599 and later · before 6abe8fe36b29ff51d1a42c2f338972883f4751a5affected · git
    • 6.6.90 and later · before 6.6.160affected · semver
    • 6.12.28 and later · before 6.12.114affected · semver
    • 5.15.182 and later · before 5.16affected · semver
    • 6.1.138 and later · before 6.2affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
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-2026-93079Sep 17, 2026 · cxl/features: Reject Get Feature count larger than the output buffer
    31Monitor
  • ← EarlierCVE-2026-93080Sep 17, 2026 · firmware: arm_scmi: Fix transport device teardown lookup
    0Monitor
  • Later →CVE-2026-93082Sep 17, 2026 · firmware: arm_scmi: Unwind P2A receiver mailbox setup failure
    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 Linux5.16Vendor (CNA)
Linux Linux6.12.114Vendor (CNA)
Linux Linux6.15Vendor (CNA)
Linux Linux6.2Vendor (CNA)
Linux Linux6.6.160Vendor (CNA)
Linux Linux6abe8fe36b29ff51d1a42c2f338972883f4751a5Vendor (CNA)
Linux Linux916e27f71a80f6d77c48d1a1a5782d6d5ef9017cVendor (CNA)
Linux Linuxa60bc2df2d323cc1342f0cf95563cae266801e20Vendor (CNA)
Linux Linuxc59b3393df1348a12308aaabd5fbc58ed6b21cf5Vendor (CNA)
Linux Linuxd8ecdceeb90cd2c265b222a7b65487faf68fea73Vendor (CNA)
debian:linux7.2.6-1 · Debian:14Package 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 (4 more)

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

All records