---
id: CVE-2026-64118
title: 'qed: fix double free in qed_cxt_tables_alloc()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  qed: fix double free in qed_cxt_tables_alloc()

  If one of the later PF or VF CID bitmap allocations fails,
  qed_cid_map_alloc() jumps to cid_map_fail and frees the previ…
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da <
    9fe030719bd083b766602692ee96c8c985798e3c
  - >-
    Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da <
    06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227
  - >-
    Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da <
    8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb
  - >-
    Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da <
    3904b993cc17ec5d7c5d3b57dbd0b775dafb9684
  - >-
    Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da <
    bdf678a273cadbccc347f331ae2e93ff4d14834c
  - >-
    Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da <
    0e47fc1c9181ae029e0e35a865cbf2adcbae626c
  - >-
    Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da <
    a04c207f0801abdd23a169b5f902a9845059a65a
  - >-
    Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da <
    2bccfb8476ca5f3548afbd623dc7a6980d4e77de
  - Linux 4.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:36:40.630775Z'
published: '2026-07-19'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:42:23.936Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64118'
references:
  - url: 'https://git.kernel.org/stable/c/9fe030719bd083b766602692ee96c8c985798e3c'
  - url: 'https://git.kernel.org/stable/c/06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227'
  - url: 'https://git.kernel.org/stable/c/8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb'
  - url: 'https://git.kernel.org/stable/c/3904b993cc17ec5d7c5d3b57dbd0b775dafb9684'
  - url: 'https://git.kernel.org/stable/c/bdf678a273cadbccc347f331ae2e93ff4d14834c'
  - url: 'https://git.kernel.org/stable/c/0e47fc1c9181ae029e0e35a865cbf2adcbae626c'
  - url: 'https://git.kernel.org/stable/c/a04c207f0801abdd23a169b5f902a9845059a65a'
  - url: 'https://git.kernel.org/stable/c/2bccfb8476ca5f3548afbd623dc7a6980d4e77de'
tags:
  - cve.org
epss: 0.00152
epssPercentile: 0.03939
ingestedAt: '2026-10-16T17:24:46.806Z'
---

## Overview

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

qed: fix double free in qed_cxt_tables_alloc()

If one of the later PF or VF CID bitmap allocations fails,
qed_cid_map_alloc() jumps to cid_map_fail and frees the previously
allocated CID bitmaps before returning an error. qed_cxt_tables_alloc()
then calls qed_cxt_mngr_free(), which invokes qed_cid_map_free()
again.

Fix this by setting each CID bitmap pointer to NULL after bitmap_free()
to avoid double free.

The bug was first flagged by an experimental analysis tool we are
developing for kernel memory-management bugs while analyzing
v6.13-rc1. The tool is still under development and is not yet publicly
available. Manual inspection confirms that the bug is still
present in v7.1-rc3.

Runtime reproduction was not attempted because exercising the failing
allocation path requires device-specific setup.

## Affected

- `Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da < 9fe030719bd083b766602692ee96c8c985798e3c`
- `Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da < 06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227`
- `Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da < 8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb`
- `Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da < 3904b993cc17ec5d7c5d3b57dbd0b775dafb9684`
- `Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da < bdf678a273cadbccc347f331ae2e93ff4d14834c`
- `Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da < 0e47fc1c9181ae029e0e35a865cbf2adcbae626c`
- `Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da < a04c207f0801abdd23a169b5f902a9845059a65a`
- `Linux >= fe56b9e6a8d957d6a20729d626027f800c17a2da < 2bccfb8476ca5f3548afbd623dc7a6980d4e77de`
- `Linux 4.4`

## Remediation

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