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CVE-2026-90410· NVD / CVE Program· CNA Linux

spi: davinci: switch to managed controller allocation

In the Linux kernel, the following vulnerability has been resolved: spi: davinci: switch to managed controller allocation The controller is allocated with the non-managed spi_alloc_host() while the interrupt is registered with devm_request_threaded_irq(). During removal, spi_bitbang_stop() only unregisters the controller; the subsequent spi_controller_put() then frees the controller together with its embedded davinci_spi devdata, which is the IRQ handler's dev_id. The devm_request_threaded_irq() release action (free_irq()), which drains the handler, does not run until after .remove() returns. A late or latched interrupt can therefore reach davinci_spi_irq() and dereference already-freed memory. Switch to devm_spi_alloc_host() so that the devres LIFO order releases the controller only after free_irq() has drained the handler, and drop the now-redundant spi_controller_put() from .remove(). The probe error path is simplified to direct returns. The clock is acquired with devm_clk_get_enabled(), which is registered after the IRQ and thus released before it by the devres LIFO order. Drain the interrupt explicitly with devm_free_irq() before disabling the controller so that a late interrupt cannot access the registers of a clock-gated controller. This issue was found by an in-house static analysis tool.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Sep 17, 2026
EPSS
0.2% · 10th percentile
CWE
—
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Action score

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Low priority for now.

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

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Affected systems

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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

    • 3.14affected
    • 5b3bb5963ff23a344062aba04937533a6f575761 and later · before 29e37f768f35592e26477f703649bd2e6f18d857affected · git
    • 5b3bb5963ff23a344062aba04937533a6f575761 and later · before f9452eba71fbfcee55c0b8e030ee3615e9f75f65affected · git
    • 5b3bb5963ff23a344062aba04937533a6f575761 and later · before 3b544072185c3d19ddec621ec9f6897ea2d10ee3affected · git
    • 5b3bb5963ff23a344062aba04937533a6f575761 and later · before 1a7958ce58dc95b06615df00c120ece4eb9ccc86affected · git
    • 5b3bb5963ff23a344062aba04937533a6f575761 and later · before ea408a05dc8f18b4a184b88d6e19d2fd1acc1527affected · git
    • before 3.14not affected · semver
    • 6.6.157 and later · up to and including 6.6.*not affected · semver
    • 6.12.110 and later · up to and including 6.12.*not affected · semver
    • 6.18.52 and later · up to and including 6.18.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxall versions—
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

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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 Linux1a7958ce58dc95b06615df00c120ece4eb9ccc86Vendor (CNA)
Linux Linux29e37f768f35592e26477f703649bd2e6f18d857Vendor (CNA)
Linux Linux3b544072185c3d19ddec621ec9f6897ea2d10ee3Vendor (CNA)
Linux Linuxea408a05dc8f18b4a184b88d6e19d2fd1acc1527Vendor (CNA)
Linux Linuxf9452eba71fbfcee55c0b8e030ee3615e9f75f65Vendor (CNA)
debian:linux6.12.111-1 · Debian:13Package 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

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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.

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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

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

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