What’s Vulnerable › Vulnerabilities

CVE-2026-98528: gpio: cdev: fix kernel stack leak to user-space in error path

• 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: 2026-10-18 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: gpio: cdev: fix kernel stack leak to user-space in error path If we fail to acquire the GPIO chip guard in gpio_desc_to_lineinfo(), we return immediately before zeroing the info struct we'll end up passing to the user-space later in lineinfo_get_v1(). This may leak the kernel stack contents. Make gpio_desc_to_lineinfo() return int so that the -ENODEV returned on failure to acquire the guard can be propagated to the callers. While not strictly necessary: move the memset() before trying to acquire the SRCU read lock too for good measure.

Affected products

• Linux kernel: 6.9 — fixed in 7.3

How to fix

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

References

• https://git.kernel.org/stable/c/1feb5d39b05afd902ed9fc902ec5b15be03a4bdb
• https://git.kernel.org/stable/c/60a466f231905cd96ae6f0f3c44a710c97873dac
• https://git.kernel.org/stable/c/8460ee5216ab9a38263b01dca4b0a27e083f70f3
• https://git.kernel.org/stable/c/cf3d043582e106a0e57002bec8a6de8929ba3e1c

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