---
id: CVE-2026-99027
title: 'net: team: stop reusing skb after queue override'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: team: stop reusing skb after queue override

  A nonzero dev_queue_xmit() result does not return ownership of the skb.
  When an override port's qdisc drops it, the qu…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a <
    b21f20320fa2f3c683e3334d70de6bfd172e544a
  - >-
    Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a <
    07a48cfceb3d0555710a9acb87c949500a7b4523
  - >-
    Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a <
    0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e
  - >-
    Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a <
    bed63353341d2d44cbad034001dd382cfe3a3892
  - >-
    Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a <
    b7454f1940c5e6d92e753853c476a769e452f30a
  - Linux 3.7
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T12:21:14.896Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-99027'
references:
  - url: 'https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a'
  - url: 'https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523'
  - url: 'https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e'
  - url: 'https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892'
  - url: 'https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a'
tags:
  - cve.org
ingestedAt: '2026-10-23T13:24:55.532Z'
---

## Overview

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

net: team: stop reusing skb after queue override

A nonzero dev_queue_xmit() result does not return ownership of the skb.
When an override port's qdisc drops it, the queue override helper used to
try another port or the mode transmit op with the freed skb.

Return the handoff decision separately from transmit success. Select only
the first override port under RCU and stop after handing it the skb,
regardless of the lower transmit result. Keep the existing success and
drop accounting.

  BUG: KASAN: slab-use-after-free in sk_skb_reason_drop
  Write of size 4 by task poc/5040
  sk_skb_reason_drop (net/core/skbuff.c:1240)
  dev_kfree_skb_any_reason (net/core/dev.c:3470)
  ab_transmit (drivers/net/team/team_mode_activebackup.c:49)
  team_xmit (drivers/net/team/team_core.c:1849)
  __dev_direct_xmit (net/core/dev.c:4934)
  Freed by task 5040:
  __tcf_kfree_skb_list (net/sched/sch_generic.c:43)
  __dev_queue_xmit (net/core/dev.c:4831)
  team_xmit (drivers/net/team/team_core.c:1846)
  Kernel panic - not syncing: KASAN: panic_on_warn set ...

## Affected

- `Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a < b21f20320fa2f3c683e3334d70de6bfd172e544a`
- `Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a < 07a48cfceb3d0555710a9acb87c949500a7b4523`
- `Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a < 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e`
- `Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a < bed63353341d2d44cbad034001dd382cfe3a3892`
- `Linux >= 8ff5105a2b9dd0ba596719b165c1827d101e5f1a < b7454f1940c5e6d92e753853c476a769e452f30a`
- `Linux 3.7`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.