CVE-2026-23336

HIGH EPSS 2.6%
Published Mar 25, 20263mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Mar 25, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister() There is a use-after-free error in cfg80211_shutdown_all_interfaces found by syzkaller: BUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220 Read of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326 CPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: events cfg80211_rfkill_block_work Call Trace: <TASK> dump_stack_lvl+0x116/0x1f0 print_report+0xcd/0x630 kasan_report+0xe0/0x110 cfg80211_shutdown_all_interfaces+0x213/0x220 cfg80211_rfkill_block_work+0x1e/0x30 process_one_work+0x9cf/0x1b70 worker_thread+0x6c8/0xf10 kthread+0x3c5/0x780 ret_from_fork+0x56d/0x700 ret_from_fork_asm+0x1a/0x30 </TASK> The problem arises due to the rfkill_block work is not cancelled when wiphy is being unregistered. In order to fix the issue cancel the corresponding work in wiphy_unregister(). Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥2.6.31.1  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.167
linuxlinux_kernel*≥6.2  –  <6.6.130
linuxlinux_kernel*≥6.7  –  <6.12.77
linuxlinux_kernel*≥6.13  –  <6.18.17
linuxlinux_kernel*≥6.19  –  <6.19.7
linuxlinux_kernel2.6.31any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/767d23ade706d5fa51c36168e92a9c5533c351a1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82a35356b5c1f75fe6a8a561db44e8d0e49da8f9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2e9626a9d16b9bbbd06498c9e73c93be354dc7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/767d23ade706d5fa51c36168e92a9c5533c351a1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82a35356b5c1f75fe6a8a561db44e8d0e49da8f9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b2e9626a9d16b9bbbd06498c9e73c93be354dc7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173
    Patch