SB20260816467 - Improper control of a resource through its lifetime in Linux kernel sched

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-72057)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

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 preservation of control-buffer state in tcf_ct_handle_fragments() in the act_ct component when handling fragmented traffic through connection-tracking defragmentation. A remote attacker can send specially crafted fragmented packets to cause a denial of service.

System impact occurs when panic_on_warn is enabled.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2400c4b05d58834b994500a9eec90a37db44187c
• https://git.kernel.org/stable/c/5c3ae5f6c7c6de73ea9b6a75154fe4ed343e1bac
• https://git.kernel.org/stable/c/9092e15defbe6c7bc241c306093ca9d358a578e7
• https://git.kernel.org/stable/c/b3d835407846134b0d54637c0281b39bebef831d
• https://git.kernel.org/stable/c/f7f45ceb855d9ba1cba594fb3f383255f7013fad