SB20260812211 - Improper Check or Handling of Exceptional Conditions in Linux kernel tipc

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-68313)

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

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 cause a denial of service.

The vulnerability exists due to improper error handling in __tipc_nl_compat_dumpit in the TIPC netlink compatibility handler when processing dumpit callback results. A local user can trigger a negative return value path to cause a denial of service.

The issue can lead to an infinite loop that prevents genl_mutex from being released, causing tasks waiting on the mutex to starve in D state.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1ab78af2140189b735b8d3b889b0284128cb2013
• https://git.kernel.org/stable/c/22f8aa35964e8f2ab026578f45befc9605fd1b28
• https://git.kernel.org/stable/c/b8f3b8efa5f99081b14de1a7ffa68a81bf01bd48
• https://git.kernel.org/stable/c/e740e90ca8e7f70d9eac1aa31a8b3e0e4d32b2ef
• https://git.kernel.org/stable/c/f9c669d9f4cac832fe31193cdbc24c6a9d99398b