CVE

CVE-2021-46914

Date: (C)2024-02-27   (M)2024-04-19

In the Linux kernel, the following vulnerability has been resolved: ixgbe: fix unbalanced device enable/disable in suspend/resume pci_disable_device() called in __ixgbe_shutdown() decreases dev->enable_cnt by 1. pci_enable_device_mem() which increases dev->enable_cnt by 1, was removed from ixgbe_resume() in commit 6f82b2558735 ("ixgbe: use generic power management"). This caused unbalanced increase/decrease. So add pci_enable_device_mem() back. Fix the following call trace. ixgbe 0000:17:00.1: disabling already-disabled device Call Trace: __ixgbe_shutdown+0x10a/0x1e0 [ixgbe] ixgbe_suspend+0x32/0x70 [ixgbe] pci_pm_suspend+0x87/0x160 ? pci_pm_freeze+0xd0/0xd0 dpm_run_callback+0x42/0x170 __device_suspend+0x114/0x460 async_suspend+0x1f/0xa0 async_run_entry_fn+0x3c/0xf0 process_one_work+0x1dd/0x410 worker_thread+0x34/0x3f0 ? cancel_delayed_work+0x90/0x90 kthread+0x14c/0x170 ? kthread_park+0x90/0x90 ret_from_fork+0x1f/0x30

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:		CVSS V2 Severity:
CVSS Score : 5.5		CVSS Score :
Exploit Score: 1.8		Exploit Score:
Impact Score: 3.6		Impact Score:
CVSS V3 Metrics:		CVSS V2 Metrics:
Attack Vector: LOCAL		Access Vector:
Attack Complexity: LOW		Access Complexity:
Privileges Required: LOW		Authentication:
User Interaction: NONE		Confidentiality:
Scope: UNCHANGED		Integrity:
Confidentiality: NONE		Availability:
Integrity: NONE
Availability: HIGH

Reference:

https://git.kernel.org/stable/c/be07581aacae7cd0a073afae8e8862032f794309

https://git.kernel.org/stable/c/debb9df311582c83fe369baa35fa4b92e8a9c58a

https://git.kernel.org/stable/c/f1b4be4a753caa4056496f679d70550d0c11a264