CVE-2024-26932

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> usb: typec: tcpm: fix double-free issue in tcpm_port_unregister_pd()<br /> <br /> When unregister pd capabilitie in tcpm, KASAN will capture below double<br /> -free issue. The root cause is the same capabilitiy will be kfreed twice,<br /> the first time is kfreed by pd_capabilities_release() and the second time<br /> is explicitly kfreed by tcpm_port_unregister_pd().<br /> <br /> [ 3.988059] BUG: KASAN: double-free in tcpm_port_unregister_pd+0x1a4/0x3dc<br /> [ 3.995001] Free of addr ffff0008164d3000 by task kworker/u16:0/10<br /> [ 4.001206]<br /> [ 4.002712] CPU: 2 PID: 10 Comm: kworker/u16:0 Not tainted 6.8.0-rc5-next-20240220-05616-g52728c567a55 #53<br /> [ 4.012402] Hardware name: Freescale i.MX8QXP MEK (DT)<br /> [ 4.017569] Workqueue: events_unbound deferred_probe_work_func<br /> [ 4.023456] Call trace:<br /> [ 4.025920] dump_backtrace+0x94/0xec<br /> [ 4.029629] show_stack+0x18/0x24<br /> [ 4.032974] dump_stack_lvl+0x78/0x90<br /> [ 4.036675] print_report+0xfc/0x5c0<br /> [ 4.040289] kasan_report_invalid_free+0xa0/0xc0<br /> [ 4.044937] __kasan_slab_free+0x124/0x154<br /> [ 4.049072] kfree+0xb4/0x1e8<br /> [ 4.052069] tcpm_port_unregister_pd+0x1a4/0x3dc<br /> [ 4.056725] tcpm_register_port+0x1dd0/0x2558<br /> [ 4.061121] tcpci_register_port+0x420/0x71c<br /> [ 4.065430] tcpci_probe+0x118/0x2e0<br /> <br /> To fix the issue, this will remove kree() from tcpm_port_unregister_pd().