platform/x86: x86-android-tablets: hold device reference for secondary fwnode teardown
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 7.2.7
- 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: platform/x86: x86-android-tablets: hold device reference for secondary fwnode teardown In gpio_secondary_fwnode_init(), acpi_bus_find_device_by_name() returns a device reference, but the local dev variable is declared with __free(put_device), dropping the reference at the end of each iteration. Meanwhile, devm_add_action_or_reset() saves the dev pointer for gpio_secondary_unset() without incrementing its reference count, which could lead to a use-after-free during driver teardown if the device is released in the interim. Acquire an explicit device reference with get_device() when registering the devres action, and drop it with put_device() inside gpio_secondary_unset().
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 1448c2d2ca5cc7f4ea6694e6bc809946de0a751c · fixed in c62b6e081119f2ab03cfcafde1f83c0f50e8e726; From 1448c2d2ca5cc7f4ea6694e6bc809946de0a751c · fixed in 144113b0a70fa18033a747ee5db6803308f7688c
- Linux Linux
7.2
- KernelLinux
From 7.2.0 · fixed in 7.2.7