SB20260928263 - Allocation of Resources Without Limits or Throttling in Linux kernel ipv6

Description

This security bulletin contains information about 1 vulnerability.

1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-97939)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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

The vulnerability exists due to missing memory accounting in IPv4 and IPv6 multicast routing table allocations when creating multicast routing tables with MRT_TABLE or MRT6_TABLE. A local privileged user can create many multicast routing tables to cause a denial of service.

Exploitation requires netadmin privileges in a user and network namespace.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0264b3ee09b118fec8a5471b4ca288f8ab84722f
• https://git.kernel.org/stable/c/b7ee18725f2292ab554aa96a101ae42d45f008bd
• https://git.kernel.org/stable/c/d0a2e2a4ee6bfe51e398bfb6921a7d0f4c26bc1c