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CVE Record

CVE-2026-23308: pinctrl: equilibrium: fix warning trace on load

In the Linux kernel, the following vulnerability has been resolved: pinctrl: equilibrium: fix warning trace on load The callback functions 'eqbr_irq_mask()' and 'eqbr_irq_ack()' are also called in the callback function 'eqbr_irq_mask_ack()'. This is done to avoid source code duplication. The problem, is that in the function 'eqbr_irq_mask()' also calles the gpiolib function 'gpiochip_disable_irq()' This generates the following warning trace in the log for every gpio on load. [ 6.088111] ------------[ cut here ]------------ [ 6.092440] WARNING: CPU: 3 PID: 1 at drivers/gpio/gpiolib.c:3810 gpiochip_disable_irq+0x39/0x50 [ 6.097847] Modules linked in: [ 6.097847] CPU: 3 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W 6.12.59+ #0 [ 6.097847] Tainted: [W]=WARN [ 6.097847] RIP: 0010:gpiochip_disable_irq+0x39/0x50 [ 6.097847] Code: 39 c6 48 19 c0 21 c6 48 c1 e6 05 48 03 b2 38 03 00 00 48 81 fe 00 f0 ff ff 77 11 48 8b 46 08 f6 c4 02 74 06 f0 80 66 09 fb c3 <0f> 0b 90 0f 1f 40 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 [ 6.097847] RSP: 0000:ffffc9000000b830 EFLAGS: 00010046 [ 6.097847] RAX: 0000000000000045 RBX: ffff888001be02a0 RCX: 0000000000000008 [ 6.097847] RDX: ffff888001be9000 RSI: ffff888001b2dd00 RDI: ffff888001be02a0 [ 6.097847] RBP: ffffc9000000b860 R08: 0000000000000000 R09: 0000000000000000 [ 6.097847] R10: 0000000000000001 R11: ffff888001b2a154 R12: ffff888001be0514 [ 6.097847] R13: ffff888001be02a0 R14: 0000000000000008 R15: 0000000000000000 [ 6.097847] FS: 0000000000000000(0000) GS:ffff888041d80000(0000) knlGS:0000000000000000 [ 6.097847] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6.097847] CR2: 0000000000000000 CR3: 0000000003030000 CR4: 00000000001026b0 [ 6.097847] Call Trace: [ 6.097847] <TASK> [ 6.097847] ? eqbr_irq_mask+0x63/0x70 [ 6.097847] ? no_action+0x10/0x10 [ 6.097847] eqbr_irq_mask_ack+0x11/0x60 In an other driver (drivers/pinctrl/starfive/pinctrl-starfive-jh7100.c) the interrupt is not disabled here. To fix this, do not call the 'eqbr_irq_mask()' and 'eqbr_irq_ack()' function. Implement instead this directly without disabling the interrupts.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2026-23308 is a Linux kernel issue in the equilibrium pinctrl driver. When the driver loads, it can trigger warning traces for GPIO interrupts because an interrupt-disable path is called in the wrong context. The provided sources do not show data exposure, privilege escalation, remote attack, or active exploitation.

Executive priority

Treat as a normal kernel maintenance item unless affected hardware is confirmed in production. There is no sourced evidence of exploitation or severe impact, but repeated kernel warnings can complicate operations and should be cleared through standard patching.

Technical view

The issue is in the Linux kernel equilibrium pinctrl interrupt handling. eqbr_irq_mask_ack() reused eqbr_irq_mask() and eqbr_irq_ack(), causing gpiochip_disable_irq() to be called and generating warnings on load. The fix avoids those helper calls and implements mask and acknowledge behavior directly without disabling interrupts.

Likely exposure

Exposure appears limited to Linux systems that include and load the equilibrium pinctrl driver, likely specific hardware or embedded platforms. The source bundle lists affected Linux versions but provides no CPEs, distributions, hardware inventory, or package-level mapping.

Exploitation context

No active exploitation is supported by the provided sources. KEV is false, no exploit source is cited, and the described symptom is a kernel warning trace during driver load rather than a documented attacker-controlled path.

Researcher notes

Evidence is narrow: the public description documents a warning trace and a code correction. No CVSS, CWE, exploitability analysis, or downstream distribution mapping is provided. Validate branch-specific exposure against the kernel commit history and vendor backports.

Mitigation direction

  • Update to a vendor kernel containing one of the referenced stable fixes.
  • Prioritize systems where the equilibrium pinctrl driver is enabled or loaded.
  • Check Linux distribution or hardware vendor advisories for fixed package versions.
  • Avoid inventing workarounds; follow vendor kernel guidance where updates are unavailable.

Validation and detection

  • Inventory kernels on systems using affected hardware or embedded images.
  • Check whether the equilibrium pinctrl driver is built or loaded.
  • Review boot logs for gpiochip_disable_irq and eqbr_irq_mask_ack warning traces.
  • Confirm the running kernel includes the referenced stable commit for its branch.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
6Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

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Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux52066a53bd116a2f41d04d99b5095c02ad8cf953, 52066a53bd116a2f41d04d99b5095c02ad8cf953, 52066a53bd116a2f41d04d99b5095c02ad8cf953, 52066a53bd116a2f41d04d99b5095c02ad8cf953, 52066a53bd116a2f41d04d99b5095c02ad8cf953unaffected
LinuxLinux6.4, 0, 6.6.130, 6.12.77, 6.18.17, 6.19.7, 7.0affected
Weakness

CWE details

No CWE listed

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