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.
Metrics
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Solution
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Sun, 18 Oct 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-200 |
Sun, 18 Oct 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | gpio: cdev: fix kernel stack leak to user-space in error path | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-10-18T15:17:46.695Z
Reserved: 2026-09-25T10:25:14.355Z
Link: CVE-2026-98528
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-18T16:17:04.303
Modified: 2026-10-18T16:17:04.303
Link: CVE-2026-98528
Redhat
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OpenCVE Enrichment
Updated: 2026-10-18T17:30:16Z