gpio: cdev: fix kernel stack leak to user-space in error path
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.12.112, 6.18.55, 7.2.9
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 · fixed in 8460ee5216ab9a38263b01dca4b0a27e083f70f3; From d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 · fixed in cf3d043582e106a0e57002bec8a6de8929ba3e1c; From d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 · fixed in 60a466f231905cd96ae6f0f3c44a710c97873dac; From d83cee3d2bb131c7fca7e19f1e33dc7530fd7083 · fixed in 1feb5d39b05afd902ed9fc902ec5b15be03a4bdb
- Linux Linux
6.9
- KernelLinux
From 6.9.0 · fixed in 6.12.112; From 6.13.0 · fixed in 6.18.55; From 6.19.0 · fixed in 7.2.9