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Review reviewHigh

CVE-2025-40347

Linux

In the Linux kernel, the following vulnerability has been resolved: net: enetc: fix the deadlock of enetc_mdio_lock After applying the workaround for err050089, the LS1028A platform experiences RCU stalls on RT kernel. This issue is caused by the recursive acquisition of the read lock enetc_mdio_lock. Here list some of the call stacks identified under the enetc_poll path that may lead to a deadlock: enetc_poll -> enetc_lock_mdio -> enetc_clean_rx_ring OR napi_complete_done -> napi_gro_receive -> enetc_start_xmit -> enetc_lock_mdio -> enetc_map_tx_buffs -> enetc_unlock_mdio -> enetc_unlock_m...

CVSS
7.5
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.12.16
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net: enetc: fix the deadlock of enetc_mdio_lock After applying the workaround for err050089, the LS1028A platform experiences RCU stalls on RT kernel. This issue is caused by the recursive acquisition of the read lock enetc_mdio_lock. Here list some of the call stacks identified under the enetc_poll path that may lead to a deadlock: enetc_poll -> enetc_lock_mdio -> enetc_clean_rx_ring OR napi_complete_done -> napi_gro_receive -> enetc_start_xmit -> enetc_lock_mdio -> enetc_map_tx_buffs -> enetc_unlock_mdio -> enetc_unlock_m...

Affected product and versions

Product
Linux
Affected versions
>= 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 < a649161526736f48bcc592e3a412e5bcd7dd9e24, >= 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 < 2781ca82ce8cad263d80b617addb727e6a84c9e5, >= 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 < 1f92f5bd057a4fad9dab6af17963cdd21e5da6ed, >= 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 < 2e55a49dc3b2a6b23329e4fbbd8a5feb20e220aa, >= 6d36ecdbc4410e61a0e02adc5d3abeee22a8ffd3 < 50bd33f6b3922a6b760aa30d409cae891cec8fb5, >= bf9c564716a13dde6a990d3b02c27cd6e39608bf, >= ff966263f5f9fdf9740f03fed0762ce73c230a6a, >= 5.10.24 < 5.11, >= 5.11.7 < 5.12, >= 5.12
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available