SB20260928122 - Improper Check or Handling of Exceptional Conditions in Linux kernel core

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-98073)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of conflicting alternative interface names in __dev_change_net_namespace() when moving network devices from a dying network namespace. A local user can create network devices with identical alternative names in separate network namespaces and remove the non-root network namespace to trigger a kernel warning.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/a29ea5b5034654aaaa4aadd771f48c01abfd2dfa
• https://git.kernel.org/stable/c/ac6631843269e6a9b2164e393b7f729328711d78
• https://git.kernel.org/stable/c/debac3a20dec524a59625cf10fa2f18571127824