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Review reviewHigh

CVE-2026-31502

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: team: fix header_ops type confusion with non-Ethernet ports Similar to commit 950803f72547 ("bonding: fix type confusion in bond_setup_by_slave()") team has the same class of header_ops type confusion. For non-Ethernet ports, team_setup_by_port() copies port_dev->header_ops directly. When the team device later calls dev_hard_header() or dev_parse_header(), these callbacks can run with the team net_device instead of the real lower device, so netdev_priv(dev) is interpreted as the wrong private type and can crash. The syzbot...

CVSS
7.8
EPSS
0.13%
2.90% percentile
CISA KEV
Not listed
Published
2026.04.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: team: fix header_ops type confusion with non-Ethernet ports Similar to commit 950803f72547 ("bonding: fix type confusion in bond_setup_by_slave()") team has the same class of header_ops type confusion. For non-Ethernet ports, team_setup_by_port() copies port_dev->header_ops directly. When the team device later calls dev_hard_header() or dev_parse_header(), these callbacks can run with the team net_device instead of the real lower device, so netdev_priv(dev) is interpreted as the wrong private type and can crash. The syzbot...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 1d76efe1577b4323609b1bcbfafa8b731eda071a < 420e5aad7ba89e8f79e2dc8327b0c0c24c1c1d53, >= 1d76efe1577b4323609b1bcbfafa8b731eda071a < 6d3161fa3eee64d46b766fb0db33ec7f300ef52d, >= 1d76efe1577b4323609b1bcbfafa8b731eda071a < 0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0, >= 1d76efe1577b4323609b1bcbfafa8b731eda071a < 20491d384d973a63fbdaf7a71e38d69b0659ea55, >= 1d76efe1577b4323609b1bcbfafa8b731eda071a < 425000dbf17373a4ab8be9428f5dc055ef870a56, >= 3.7, >= 3.7.1 < 6.12.80, >= 6.13 < 6.18.21, >= 6.19 < 6.19.11, 3.7, 7.0
Fixed versions
6.12.80, 6.18.21, 6.19.11

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-843