SB20260812154 - Improper resource shutdown or release in Linux kernel ipv6

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-68379)

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

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper resource shutdown or release in the tcp_v4_rcv and tcp_v6_rcv TIME_WAIT socket handling paths when processing packets that fail PSP policy checks. A remote attacker can send network packets that trigger PSP policy failure to cause a denial of service.

The issue results in a memory leak of tcp_tw_bucket structures in both IPv4 and IPv6 receive paths.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2c1931a81122c3cdc4c89448fe0442c69e21c0d5
• https://git.kernel.org/stable/c/374742a961becbbfc7fbfd1382d978a05e492741
• https://git.kernel.org/stable/c/e666af5dcc905ba694745963174d232deb478c55