SB20261022138 - Missing Release of Resource after Effective Lifetime in Linux kernel rds

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-98560)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to exhaust kernel resources and potentially cause a denial of service.

The vulnerability exists due to missing release of workqueue resources in the Linux kernel RDS connection handling code when an RDS/TCP connection to a local address is switched to the loopback transport. A local user can trigger creation of such connections followed by network namespace teardown or module unloading to leak seven workqueues per connection, potentially exhausting kernel resources and causing a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/670f303169d2d36f315c40f6d3d18b5ee8498fea
• https://git.kernel.org/stable/c/ba3d1f480c7a3fba963e7867ad6cc557c197acbc