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CVE-2026-23336— wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于注销wiphy时未取消rfkill_block工作，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3< 82a35356b5c1f75fe6a8a561db44e8d0e49da8f9 affected
1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3< b2e9626a9d16b9bbbd06498c9e73c93be354dc7a affected
1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3< eeea8da43ab86ac0a6b9cec225eec91564346940 affected
1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3< fa18639deab4a3662d543200c5bfc29bf4e23173 affected
1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3< 57e39fe8da573435fa35975f414f4dc17d9f8449 affected
1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3< 584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 affected
1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3< cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5 affected
1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3< 767d23ade706d5fa51c36168e92a9c5533c351a1 affected
… +10 more rows
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I. Basic Information for CVE-2026-23336

Vulnerability Information
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Vulnerability Title
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于注销wiphy时未取消rfkill_block工作，可能导致释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 ~ 82a35356b5c1f75fe6a8a561db44e8d0e49da8f9 -
Linux Linux 2.6.31 -

II. Public POCs for CVE-2026-23336

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III. Intelligence Information for CVE-2026-23336

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Patches & Fixes for CVE-2026-23336 (6)

Same Patch Batch · Linux · 2026-03-25 · 116 CVEs total

CVE-2026-23395 8.8 HIGH Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ
CVE-2026-31788 8.2 HIGH xen/privcmd: restrict usage in unprivileged domU
CVE-2026-23340 7.8 HIGH net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs
CVE-2026-23350 7.8 HIGH drm/xe/queue: Call fini on exec queue creation fail
CVE-2026-23351 7.8 HIGH netfilter: nft_set_pipapo: split gc into unlink and reclaim phase
CVE-2026-23317 7.8 HIGH drm/vmwgfx: Return the correct value in vmw_translate_ptr functions
CVE-2026-23306 7.8 HIGH scsi: pm8001: Fix use-after-free in pm8001_queue_command()
CVE-2026-23372 7.8 HIGH nfc: rawsock: cancel tx_work before socket teardown
CVE-2026-23378 7.8 HIGH net/sched: act_ife: Fix metalist update behavior
CVE-2026-23383 7.8 HIGH bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing
CVE-2026-23288 7.8 HIGH accel/amdxdna: Fix out-of-bounds memset in command slot handling
CVE-2026-23280 7.8 HIGH accel/amdxdna: Prevent ubuf size overflow
CVE-2026-23392 7.8 HIGH netfilter: nf_tables: release flowtable after rcu grace period on error
CVE-2026-23393 7.8 HIGH bridge: cfm: Fix race condition in peer_mep deletion
CVE-2026-23391 7.8 HIGH netfilter: xt_CT: drop pending enqueued packets on template removal
CVE-2026-23364 7.4 HIGH ksmbd: Compare MACs in constant time
CVE-2026-23294 7.0 HIGH bpf: Fix race in devmap on PREEMPT_RT
CVE-2026-23357 can: mcp251x: fix deadlock in error path of mcp251x_open
CVE-2026-23360 nvme: fix admin queue leak on controller reset
CVE-2026-23355 ata: libata: cancel pending work after clearing deferred_qc

Showing top 20 of 116 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23336

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