CVE-2024-50040

/// Technical description

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

igb: Do not bring the device up after non-fatal error

Commit 004d25060c78 ("igb: Fix igb_down hung on surprise removal")

changed igb_io_error_detected() to ignore non-fatal pcie errors in order

to avoid hung task that can happen when igb_down() is called multiple

times. This caused an issue when processing transient non-fatal errors.

igb_io_resume(), which is called after igb_io_error_detected(), assumes

that device is brought down by igb_io_error_detected() if the interface

is up. This resulted in panic with stacktrace below.

[ T3256] igb 0000:09:00.0 haeth0: igb: haeth0 NIC Link is Down

[ T292] pcieport 0000:00:1c.5: AER: Uncorrected (Non-Fatal) error received: 0000:09:00.0

[ T292] igb 0000:09:00.0: PCIe Bus Error: severity=Uncorrected (Non-Fatal), type=Transaction Layer, (Requester ID)

[ T292] igb 0000:09:00.0: device [8086:1537] error status/mask=00004000/00000000

[ T292] igb 0000:09:00.0: [14] CmpltTO

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References