What’s Vulnerable › Vulnerabilities

CVE-2026-98971: gpio: exar: initialize the ID before registering its cleanup

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-23 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: gpio: exar: initialize the ID before registering its cleanup devm_add_action_or_reset() invokes the cleanup action immediately when registering the action fails. gpio_exar_probe() currently stores the allocated ID in exar_gpio only after registering the action, so that failure makes exar_devm_ida_free() release ID 0. If the allocated ID is nonzero, this leaks that ID and can free ID 0 belonging to another device. Store the ID before registering the cleanup action so both the immediate failure path and normal device teardown release the correct allocation.

Affected products

• Linux: 5.11 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/01318927a9055136c207399eeb36ce07becac179
• https://git.kernel.org/stable/c/0250acba81654b2ee50bde324ad72b3f0c04d0bd
• https://git.kernel.org/stable/c/4d69e74034b208588636ecc177e0dd43a7696af3
• https://git.kernel.org/stable/c/88b9c4bbf83d940ab672956e5af921215905dcb4
• https://git.kernel.org/stable/c/b78c114600ae3df90c083c72c290437b068577c8
• https://git.kernel.org/stable/c/bf3d841ef12fcbec4458e2750956b738b043a226
• https://git.kernel.org/stable/c/f7ec4dbd2a073dd53b6349be1c586fe8580dd6b2

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