CVE-2026-98857

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

ipvs: bound LBLCR and LBLC cache growth

ip_vs_lblcr_new() and ip_vs_lblc_new() create cache entries for

every previously unseen destination address. The table max_size only

tells the periodic collector to reclaim entries after the cache has

already exceeded the limit. It does not reclaim entries that the

attacker continues to use.

Reject new cache entries once either table reaches max_size * 3 / 2.

The extra headroom lets the periodic collector catch up while the

existing scheduler fallback continues to use the selected destination

when cache creation fails. New traffic therefore stays serviceable

without growing the tables further.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References