SB20260529154 - Improper resource shutdown or release in Linux kernel 8021q

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-46153)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to improper resource shutdown or release in vlan_dev_set_egress_priority() when repeatedly setting and clearing egress priority mappings with distinct skb priorities. A local user can trigger repeated set and clear operations to cause a denial of service.

The issue results in mapping nodes being retained until device teardown, leading to memory consumption over time.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/7dddc74af369478ba7f9bc136d0fc1dc4570cb66
• https://git.kernel.org/stable/c/a52e122c9e4d56ad9a03b32c915a199276d989c3