Updated: 2024-08-20 21:27:07.644653
Description:
In the Linux kernel, the following vulnerability has been resolved: greybus: Fix use-after-free bug in gb_interface_release due to race condition. In gb_interface_create, &intf->mode_switch_completion is bound with gb_interface_mode_switch_work. Then it will be started by gb_interface_request_mode_switch. Here is the relevant code. if (!queue_work(system_long_wq, &intf->mode_switch_work)) { ... } If we call gb_interface_release to make cleanup, there may be an unfinished work. This function will call kfree to free the object "intf". However, if gb_interface_mode_switch_work is scheduled to run after kfree, it may cause use-after-free error as gb_interface_mode_switch_work will use the object "intf". The possible execution flow that may lead to the issue is as follows: CPU0 CPU1 | gb_interface_create | gb_interface_request_mode_switch gb_interface_release | kfree(intf) (free) | | gb_interface_mode_switch_work | mutex_lock(&intf->mutex) (use) Fix it by canceling the work before kfree.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0 | |
| CVSS Version 3.x | HIGH | 7.8 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated |
|---|---|---|---|---|---|---|---|
| AlmaLinux 9.2 ESU | kernel | 5.14.0 | 7.8 | HIGH | Not Vulnerable | 2024-07-26 05:09:08 | |
| AlmaLinux 9.2 FIPS | kernel | 5.14.0 | 7.8 | HIGH | Not Vulnerable | 2024-07-26 05:09:08 | |
| CentOS 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2024-07-31 14:29:05 | |
| CentOS 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | Not Vulnerable | 2024-07-31 14:29:05 | |
| CentOS 8.4 ELS | kernel | 4.18.0 | 7.8 | HIGH | Not Vulnerable | 2024-08-26 17:31:00 | |
| CentOS 8.5 ELS | kernel | 4.18.0 | 7.8 | HIGH | Not Vulnerable | 2024-09-05 03:40:10 | |
| CentOS Stream 8 ELS | kernel | 4.18.0 | 7.8 | HIGH | Not Vulnerable | 2024-09-05 03:40:09 | |
| CloudLinux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2024-07-31 14:29:05 | |
| CloudLinux 7 ELS | kernel | 3.10.0 | 7.8 | HIGH | Needs Triage | 2024-09-03 12:13:15 | |
| Oracle Linux 6 ELS | kernel | 2.6.32 | 7.8 | HIGH | Not Vulnerable | 2024-07-31 14:29:05 |