vulnerability

Ubuntu: (Multiple Advisories) (CVE-2024-26932): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
May 1, 2024
Added
Jul 1, 2024
Modified
Aug 18, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

usb: typec: tcpm: fix double-free issue in tcpm_port_unregister_pd()

When unregister pd capabilitie in tcpm, KASAN will capture below double
-free issue. The root cause is the same capabilitiy will be kfreed twice,
the first time is kfreed by pd_capabilities_release() and the second time
is explicitly kfreed by tcpm_port_unregister_pd().

[ 3.988059] BUG: KASAN: double-free in tcpm_port_unregister_pd+0x1a4/0x3dc
[ 3.995001] Free of addr ffff0008164d3000 by task kworker/u16:0/10
[ 4.001206]
[ 4.002712] CPU: 2 PID: 10 Comm: kworker/u16:0 Not tainted 6.8.0-rc5-next-20240220-05616-g52728c567a55 #53
[ 4.012402] Hardware name: Freescale i.MX8QXP MEK (DT)
[ 4.017569] Workqueue: events_unbound deferred_probe_work_func
[ 4.023456] Call trace:
[ 4.025920] dump_backtrace+0x94/0xec
[ 4.029629] show_stack+0x18/0x24
[ 4.032974] dump_stack_lvl+0x78/0x90
[ 4.036675] print_report+0xfc/0x5c0
[ 4.040289] kasan_report_invalid_free+0xa0/0xc0
[ 4.044937] __kasan_slab_free+0x124/0x154
[ 4.049072] kfree+0xb4/0x1e8
[ 4.052069] tcpm_port_unregister_pd+0x1a4/0x3dc
[ 4.056725] tcpm_register_port+0x1dd0/0x2558
[ 4.061121] tcpci_register_port+0x420/0x71c
[ 4.065430] tcpci_probe+0x118/0x2e0

To fix the issue, this will remove kree() from tcpm_port_unregister_pd().

Solutions

ubuntu-upgrade-linux-image-6-8-0-1004-gkeubuntu-upgrade-linux-image-6-8-0-1005-raspiubuntu-upgrade-linux-image-6-8-0-1006-ibmubuntu-upgrade-linux-image-6-8-0-1006-oemubuntu-upgrade-linux-image-6-8-0-1006-oracleubuntu-upgrade-linux-image-6-8-0-1006-oracle-64kubuntu-upgrade-linux-image-6-8-0-1008-azureubuntu-upgrade-linux-image-6-8-0-1008-azure-fdeubuntu-upgrade-linux-image-6-8-0-1008-gcpubuntu-upgrade-linux-image-6-8-0-1009-awsubuntu-upgrade-linux-image-6-8-0-35-genericubuntu-upgrade-linux-image-6-8-0-35-generic-64kubuntu-upgrade-linux-image-6-8-0-35-lowlatencyubuntu-upgrade-linux-image-6-8-0-35-lowlatency-64kubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-fdeubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-hwe-24-04ubuntu-upgrade-linux-image-generic-hwe-24-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-classicubuntu-upgrade-linux-image-ibm-lts-24-04ubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-64kubuntu-upgrade-linux-image-oem-24-04ubuntu-upgrade-linux-image-oem-24-04aubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-64kubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-24-04
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