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CVE-2026-74519

Updated on 15 Aug 2026

Severity

7.8 High severity

Details

CVSS score
7.8
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

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

pinctrl: devicetree: don’t free uninitialized dev_name on error path

dt_remember_or_free_map() duplicates dev_name for each map entry. If kstrdup_const() fails, dt_free_map() frees dev_name in all num_maps entries, including entries that have not been initialized.

Some pinctrl drivers, including pinctrl-imx, allocate the map with kmalloc() and leave dev_name for the core to initialize. The untouched entries therefore contain uninitialized data which is passed to kfree_const().

Reproduced on qemu’s mcimx6ul-evk (pinctrl-imx) with failslab injection while binding the pinctrl-consuming device, under KASAN:

BUG: KASAN: double-free in dt_free_map+0x34/0xa4 Free of addr c425a900 by task init/1 kfree from dt_free_map+0x34/0xa4 dt_free_map from dt_remember_or_free_map+0x184/0x198 dt_remember_or_free_map from pinctrl_dt_to_map+0x33c/0x4c8 pinctrl_dt_to_map from create_pinctrl+0x9c/0x5c0

Initialize all dev_name fields to NULL before duplicating the device name, making the full-map cleanup safe after a partial failure.

Details

Affected product:
AlmaLinux 9.2 ESU , Amazon Linux 2 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 7 ELS , Debian 11 ELS , Oracle Linux 7 ELS , RHEL 7 ELS , TuxCare 9.6 ESU , TuxCare 9.8 ESU , Ubuntu 20.04 ELS
Affected packages:
kernel @ 4.18.0 (+13 more)

Fixes

KernelCare state

Live-patch status from KernelCare for each operating system.

Operating system Status Covered kernels
Debian 12 Will Not Fix
43 kernels
  • 6.1.38-1
  • 6.1.38-2
  • 6.1.38-4
  • 6.1.52-1
  • 6.1.55-1
  • 6.1.64-1
  • 6.1.66-1
  • 6.1.69-1
  • 6.1.76-1
  • 6.1.27-1
  • 6.1.67-1
  • 6.1.85-1
  • 6.1.90-1
  • 6.1.94-1
  • 6.1.99-1
  • 6.1.106-3
  • 6.1.112-1
  • 6.1.115-1
  • 6.1.119-1
  • 6.1.123-1
  • 6.1.128-1
  • 6.1.124-1
  • 6.1.129-1
  • 6.1.133-1
  • 6.1.135-1
  • 6.1.137-1
  • 6.1.140-1
  • 6.1.139-1
  • 6.1.147-1
  • 6.1.148-1
  • 6.1.153-1
  • 6.1.158-1
  • 6.1.159-1
  • 6.1.162-1
  • 6.1.164-1
  • 6.1.170-1
  • 6.1.170-3
  • 6.1.172-1
  • 6.1.174-1
  • 6.1.170-2
  • 6.1.176-1
  • 6.1.177-1
  • 6.1.180-1
Debian 13 Will Not Fix
15 kernels
  • 6.12.85-1
  • 6.12.86-1
  • 6.12.88-1
  • 6.12.74-2
  • 6.12.73-1
  • 6.12.63-1
  • 6.12.69-1
  • 6.12.74-1
  • 6.12.90-1
  • 6.12.90-2
  • 6.12.94-1
  • 6.12.95-1
  • 6.12.96-1
  • 6.12.100-1
  • 6.12.101-1
Oracle Linux 8 UEK 7 Planned —
Oracle Linux 9 UEK 7 Will Not Fix
112 kernels
  • 5.15.0-101.103.2.1.el9uek
  • 5.15.0-8.91.4.1.el9uek
  • 5.15.0-7.86.6.1.el9uek
  • 5.15.0-5.76.5.1.el9uek
  • 5.15.0-6.80.3.1.el9uek
  • 5.15.0-3.60.5.1.el9uek
  • 5.15.0-0.30.20.el9uek
  • 5.15.0-100.96.32.el9uek
  • 5.15.0-1.43.4.2.el9uek
  • 5.15.0-2.52.3.el9uek
  • 5.15.0-4.70.5.2.el9uek
  • 5.15.0-1.43.4.1.el9uek
  • 5.15.0-0.30.20.1.el9uek
  • 5.15.0-102.110.5.el9uek
  • 5.15.0-102.110.5.1.el9uek
  • 5.15.0-103.114.4.el9uek
  • 5.15.0-104.119.4.2.el9uek
  • 5.15.0-0.30.19.el9uek
  • 5.15.0-105.125.6.2.el9uek
  • 5.15.0-105.125.6.2.1.el9uek
  • 5.15.0-105.125.6.2.2.el9uek
  • 5.15.0-106.131.4.el9uek
  • 5.15.0-200.131.27.el9uek
  • 5.15.0-200.131.27.1.el9uek
  • 5.15.0-201.135.6.el9uek
  • 5.15.0-202.135.2.el9uek
  • 5.15.0-203.146.5.1.el9uek
  • 5.15.0-204.147.6.2.el9uek
  • 5.15.0-204.147.6.3.el9uek
  • 5.15.0-205.149.5.1.el9uek
  • 5.15.0-205.149.5.4.el9uek
  • 5.15.0-206.153.7.el9uek
  • 5.15.0-206.153.7.1.el9uek
  • 5.15.0-207.156.6.el9uek
  • 5.15.0-208.159.3.el9uek
  • 5.15.0-208.159.3.2.el9uek
  • 5.15.0-209.161.7.el9uek
  • 5.15.0-209.161.7.1.el9uek
  • 5.15.0-209.161.7.2.el9uek
  • 5.15.0-210.163.7.el9uek
  • 5.15.0-300.163.18.el9uek
  • 5.15.0-300.163.18.1.el9uek
  • 5.15.0-300.163.18.1.1.el9uek
  • 5.15.0-301.163.5.2.el9uek
  • 5.15.0-302.167.6.el9uek
  • 5.15.0-300.163.18.7.el9uek
  • 5.15.0-302.167.6.1.el9uek
  • 5.15.0-303.171.5.2.el9uek
  • 5.15.0-303.171.5.2.1.el9uek
  • 5.15.0-304.171.4.el9uek
  • 5.15.0-304.171.4.1.el9uek
  • 5.15.0-304.171.4.3.el9uek
  • 5.15.0-303.171.5.2.2.el9uek
  • 5.15.0-305.176.4.el9uek
  • 5.15.0-306.177.4.el9uek
  • 5.15.0-306.177.4.1.el9uek
  • 5.15.0-307.178.5.el9uek
  • 5.15.0-308.179.6.el9uek
  • 5.15.0-308.179.6.2.el9uek
  • 5.15.0-308.179.6.3.el9uek
  • 5.15.0-309.180.4.el9uek
  • 5.15.0-308.179.6.7.el9uek
  • 5.15.0-309.180.4.2.el9uek
  • 5.15.0-308.179.6.11.el9uek
  • 5.15.0-310.184.5.2.el9uek
  • 5.15.0-310.184.5.3.el9uek
  • 5.15.0-311.185.9.el9uek
  • 5.15.0-308.179.6.14.el9uek
  • 5.15.0-312.187.5.el9uek
  • 5.15.0-312.187.5.1.el9uek
  • 5.15.0-312.187.5.2.el9uek
  • 5.15.0-312.187.5.3.el9uek
  • 5.15.0-308.179.6.16.el9uek
  • 5.15.0-313.189.5.1.el9uek
  • 5.15.0-313.189.5.2.el9uek
  • 5.15.0-313.189.5.3.el9uek
  • 5.15.0-314.193.5.3.el9uek
  • 5.15.0-314.193.5.4.el9uek
  • 5.15.0-314.193.5.5.el9uek
  • 5.15.0-315.196.5.1.el9uek
  • 5.15.0-315.196.5.2.el9uek
  • 5.15.0-316.196.4.1.el9uek
  • 5.15.0-316.196.4.2.el9uek
  • 5.15.0-317.197.5.1.el9uek
  • 5.15.0-317.197.5.2.el9uek
  • 5.15.0-318.199.3.2.el9uek
  • 5.15.0-318.199.3.2.1.el9uek
  • 5.15.0-319.201.4.2.el9uek
  • 5.15.0-319.201.4.3.el9uek
  • 5.15.0-319.201.4.4.el9uek
  • 5.15.0-319.201.4.6.el9uek
  • 5.15.0-320.202.8.2.el9uek
  • 5.15.0-320.202.8.3.el9uek
  • 5.15.0-320.202.8.4.el9uek
  • 5.15.0-320.202.8.5.el9uek
  • 5.15.0-318.199.3.6.el9uek
  • 5.15.0-321.202.5.el9uek
  • 5.15.0-321.202.5.1.el9uek
  • 5.15.0-321.202.5.2.el9uek
  • 5.15.0-321.202.5.3.el9uek
  • 5.15.0-322.203.3.2.el9uek
  • 5.15.0-322.203.3.3.el9uek
  • 5.15.0-322.203.3.4.el9uek
  • 5.15.0-322.203.3.4.5.el9uek
  • 5.15.0-308.179.6.18.el9uek
  • 5.15.0-318.199.3.7.el9uek
  • 5.15.0-322.203.3.5.el9uek
  • 5.15.0-322.203.3.4.1.el9uek
  • 5.15.0-323.211.3.3.el9uek
  • 5.15.0-323.211.3.4.el9uek
  • 5.15.0-308.179.6.19.el9uek
  • 5.15.0-323.211.3.5.el9uek
Ubuntu 22.04 Planned —
Ubuntu 22.04 AWS Planned —
Ubuntu 22.04 Azure Planned —