serial: core: fix NULL pointer dereference in serial_core_unregister_port()
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 7.2.10
- 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: serial: core: fix NULL pointer dereference in serial_core_unregister_port() port->port_dev is NULL when no port device is installed: it is cleared on teardown, and never set if registration failed before serial_core_port_device_add(). serial_core_unregister_port() passes it straight to serial_core_get_ctrl_dev(), which dereferences it: KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] RIP: serial_core_unregister_port Call Trace: serial8250_unregister_port serial8250_remove unbind_store Return early when there is no port device, and read port->port_dev under port_mutex. Also clear port->port_dev on the serial_core_register_port() error path, where the port device has already been removed.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 84a9582fd203063cd4d301204971ff2cd8327f1a · fixed in 54abbb862366dcaf1f22f1e968358147b7d0547d; From 84a9582fd203063cd4d301204971ff2cd8327f1a · fixed in 499485a67fbacf4d9afbdb43522388c64f853428
- Linux Linux
6.5
- KernelLinux
From 6.5.0 · fixed in 7.2.10