CVE-2021-46914

ixgbe: fix unbalanced device enable/disable in suspend/resume

Description

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

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/be07581aacae7cd0a073afae8e8862032f794309	patch
https://git.kernel.org/stable/c/f1b4be4a753caa4056496f679d70550d0c11a264	patch
https://git.kernel.org/stable/c/debb9df311582c83fe369baa35fa4b92e8a9c58a	patch

Frequently Asked Questions

What is the severity of CVE-2021-46914?: CVE-2021-46914 has been scored as a medium severity vulnerability.
How to fix CVE-2021-46914?: To fix CVE-2021-46914, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-46914 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-46914 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-46914?: CVE-2021-46914 affects Linux Linux, Linux Linux.

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