SB20260928322 - Missing Release of Resource after Effective Lifetime in Linux kernel sched

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-97616)

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

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service by exhausting action IDs.

The vulnerability exists due to improper resource release in tcf_action_destroy() in net/sched/act_api.c when processing a batched RTM_NEWACTION request that replaces an existing action and a later action fails to initialize. A local user can submit a crafted batched RTM_NEWACTION request to cause a denial of service by exhausting action IDs.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/048617743febf6530111cfb594e9bbbd7918bf67
• https://git.kernel.org/stable/c/478eb5abb51931a152abab068f8a717b7ff480fd
• https://git.kernel.org/stable/c/64b36eaef6ea5ada9aea4c2cf87099aaa8a4869b
• https://git.kernel.org/stable/c/f908c8a969946a45225fd7f9d9a85771e12ae0a8