CVE-2026-23336
published 2026-03-25CVE-2026-23336: 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…
PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.13%
2.6th percentile
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:
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
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.
Affected
26 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.19.8-1 (forky) | linux 6.19.8-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 < 82a35356b5c1f75fe6a8a561db44e8d0e49da8f9 | 82a35356b5c1f75fe6a8a561db44e8d0e49da8f9 |
| linux | linux | >= 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 < b2e9626a9d16b9bbbd06498c9e73c93be354dc7a | b2e9626a9d16b9bbbd06498c9e73c93be354dc7a |
| linux | linux | >= 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 < eeea8da43ab86ac0a6b9cec225eec91564346940 | eeea8da43ab86ac0a6b9cec225eec91564346940 |
| linux | linux | >= 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 < fa18639deab4a3662d543200c5bfc29bf4e23173 | fa18639deab4a3662d543200c5bfc29bf4e23173 |
| linux | linux | >= 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 < 57e39fe8da573435fa35975f414f4dc17d9f8449 | 57e39fe8da573435fa35975f414f4dc17d9f8449 |
| linux | linux | >= 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 < 584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 | 584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 |
| linux | linux | >= 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 < cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5 | cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5 |
| linux | linux | >= 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 < 767d23ade706d5fa51c36168e92a9c5533c351a1 | 767d23ade706d5fa51c36168e92a9c5533c351a1 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.19.8-1 | 6.19.8-1 |
| linux | linux_kernel | >= 2.6.31 < 6.1.167 | 6.1.167 |
| linux | linux_kernel | >= 2.6.31.1 < 5.10.253 | 5.10.253 |
| linux | linux_kernel | >= 5.11 < 5.15.203 | 5.15.203 |
| linux | linux_kernel | >= 5.16 < 6.1.167 | 6.1.167 |
| linux | linux_kernel | >= 6.13 < 6.18.17 | 6.18.17 |
| linux | linux_kernel | >= 6.13.0 < 6.18.17 | 6.18.17 |
| linux | linux_kernel | >= 6.19 < 6.19.7 | 6.19.7 |
| linux | linux_kernel | >= 6.19.0 < 6.19.7 | 6.19.7 |
| linux | linux_kernel | >= 6.2 < 6.6.130 | 6.6.130 |
| linux | linux_kernel | >= 6.2.0 < 6.6.130 | 6.6.130 |
| linux | linux_kernel | >= 6.7 < 6.12.77 | 6.12.77 |
| linux | linux_kernel | >= 6.7.0 < 6.12.77 | 6.12.77 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
ghsa5.9MEDIUM
osv7.8HIGH
vendor_debian7.8HIGH
vendor_msrc7.8HIGH
vendor_redhat7.8HIGH
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Red Hat
python-multipart: Python-Multipart: Information disclosure due to parser differential in form data handling
vendor_redhat·2026-06-22·CVSS 5.9
CVE-2026-53538 [MEDIUM] CWE-1288 python-multipart: Python-Multipart: Information disclosure due to parser differential in form data handling
python-multipart: Python-Multipart: Information disclosure due to parser differential in form data handling
Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, QuerystringParser treated ; as a field separator in application/x-www-form-urlencoded bodies, in addition to &. The WHATWG URL standard, modern browsers, and Python's urllib.parse (since the CVE-2021-23336 fix) treat only & as a separator. This creates a parser differential: the same bytes are tokenized into different fields than a WHATWG compliant intermediary would produce, allowing an attacker to smuggle extra form fields past an upstream body inspecting component. This vulnerability is fixed in 0.0.30.
A flaw was found in Python-Multipart, a tool used for processing web form data. A remote attacker co
Red Hat
kernel: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
vendor_redhat·2026-03-25·CVSS 7.8
CVE-2026-23336 [HIGH] CWE-825 kernel: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
kernel: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
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:
dump_stack_lvl+0x116/0x1f0
print_report+0xcd/0x630
kasan_report+0xe0/0x110
cfg80211_shutdown_all_interfaces+0x213/0x220
cfg80211_rfkill_block_wo
Microsoft
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
vendor_msrc·2026-03-10·CVSS 7.8
CVE-2026-23336 [HIGH] wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
Mariner: Mariner
Linux: Linux
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade
Debian
CVE-2026-23336: linux - In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80...
vendor_debian·2026·CVSS 7.8
CVE-2026-23336 [HIGH] CVE-2026-23336: linux - In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80...
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: 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 kthr
VulDB
Linux Kernel up to 7.0-rc1 wifi wiphy_unregister use after free (Nessus ID 311783)
vuldb·2026-05-04·CVSS 7.8
CVE-2026-23336 [HIGH] Linux Kernel up to 7.0-rc1 wifi wiphy_unregister use after free (Nessus ID 311783)
A vulnerability classified as critical was found in Linux Kernel up to 7.0-rc1. This affects the function wiphy_unregister of the component wifi. Executing a manipulation can lead to use after free.
This vulnerability is registered as CVE-2026-23336. The attack requires access to the local network. No exploit is available.
Upgrading the affected component is advised.
OSV
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
osv·2026-03-25·CVSS 7.8
CVE-2026-23336 [HIGH] wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
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:
dump_stack_lvl+0x116/0x1f0
print_report+0xcd/0x630
kasan_report+0xe0/0x110
cfg80211_shutdown_all_interfaces+0x213/0x220
cfg80211_rfkill_block_work+0x
OSV
CVE-2026-23336: In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister() There is a use-afte
osv·2026-03-25·CVSS 7.8
CVE-2026-23336 [HIGH] CVE-2026-23336: In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister() There is a use-afte
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: 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 kthr
GHSA
GHSA-rgr3-h3cv-574x: In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
There is a use-af
ghsa_unreviewed·2026-03-25
CVE-2026-23336 [HIGH] GHSA-rgr3-h3cv-574x: In the Linux kernel, the following vulnerability has been resolved:
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
There is a use-af
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:
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
No detection rules found.
No public exploits indexed.
Wiz
CVE-2026-23336 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 7.8
CVE-2026-23336 [HIGH] CVE-2026-23336 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-23336 :
Linux Kernel vulnerability analysis and mitigation
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: dump_stack_lvl+0x116/0x1f0
print_report+0xcd/0x630
kasan_report+0xe0/0x110
cfg80211_shutdown_all_interfaces+0x213/0x220
cfg80211_rfkill_block
Bugzilla
CVE-2026-53538 python-multipart: Python-Multipart: Information disclosure due to parser differential in form data handling
bugzilla·2026-06-22·CVSS 5.9
CVE-2026-53538 [MEDIUM] CVE-2026-53538 python-multipart: Python-Multipart: Information disclosure due to parser differential in form data handling
CVE-2026-53538 python-multipart: Python-Multipart: Information disclosure due to parser differential in form data handling
Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.30, QuerystringParser treated ; as a field separator in application/x-www-form-urlencoded bodies, in addition to &. The WHATWG URL standard, modern browsers, and Python's urllib.parse (since the CVE-2021-23336 fix) treat only & as a separator. This creates a parser differential: the same bytes are tokenized into different fields than a WHATWG compliant intermediary would produce, allowing an attacker to smuggle extra form fields past an upstream body inspecting component. This vulnerability is fixed in 0.0.30.
Bugzilla
CVE-2026-23336 kernel: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
bugzilla·2026-03-25·CVSS 7.8
CVE-2026-23336 [HIGH] CVE-2026-23336 kernel: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
CVE-2026-23336 kernel: wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
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:
dump_stack_lvl+0x116/0x1f0
print_report+0xcd/0x630
kasan_report+0xe0/0x110
cfg80211_shutdown_all_interfaces+0x213/0x220
cfg802
https://git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449https://git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2https://git.kernel.org/stable/c/767d23ade706d5fa51c36168e92a9c5533c351a1https://git.kernel.org/stable/c/82a35356b5c1f75fe6a8a561db44e8d0e49da8f9https://git.kernel.org/stable/c/b2e9626a9d16b9bbbd06498c9e73c93be354dc7ahttps://git.kernel.org/stable/c/cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5https://git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940https://git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173
2026-03-25
Published