wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()

MITRE NVD CVE.ORG Print: PDF PDF

Summary

CVECVE-2026-23336
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-25 11:16:31 UTC
Updated2026-04-02 15:16:31 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000320000 probability, percentile 0.091780000 (date 2026-04-02)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 eeea8da43ab86ac0a6b9cec225eec91564346940 git Not specified
CNA Linux Linux affected 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 fa18639deab4a3662d543200c5bfc29bf4e23173 git Not specified
CNA Linux Linux affected 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 57e39fe8da573435fa35975f414f4dc17d9f8449 git Not specified
CNA Linux Linux affected 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 git Not specified
CNA Linux Linux affected 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5 git Not specified
CNA Linux Linux affected 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 767d23ade706d5fa51c36168e92a9c5533c351a1 git Not specified
CNA Linux Linux affected 2.6.31 Not specified
CNA Linux Linux unaffected 2.6.31 semver Not specified
CNA Linux Linux unaffected 6.1.167 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.130 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.77 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.17 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.7 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0-rc2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/767d23ade706d5fa51c36168e92a9c5533c351a1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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