CVE-2026-23336 (GCVE-0-2026-23336)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-03-25 10:27
VLAI?
Title
wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < eeea8da43ab86ac0a6b9cec225eec91564346940 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < fa18639deab4a3662d543200c5bfc29bf4e23173 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < 57e39fe8da573435fa35975f414f4dc17d9f8449 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < 584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5 (git)
Affected: 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 , < 767d23ade706d5fa51c36168e92a9c5533c351a1 (git)
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    Linux Linux Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc2 , ≤ * (original_commit_for_fix)
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: cancel rfkill_block work in wiphy_unregister()\n\nThere is a use-after-free error in cfg80211_shutdown_all_interfaces found\nby syzkaller:\n\nBUG: KASAN: use-after-free in cfg80211_shutdown_all_interfaces+0x213/0x220\nRead of size 8 at addr ffff888112a78d98 by task kworker/0:5/5326\nCPU: 0 UID: 0 PID: 5326 Comm: kworker/0:5 Not tainted 6.19.0-rc2 #2 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: events cfg80211_rfkill_block_work\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x116/0x1f0\n print_report+0xcd/0x630\n kasan_report+0xe0/0x110\n cfg80211_shutdown_all_interfaces+0x213/0x220\n cfg80211_rfkill_block_work+0x1e/0x30\n process_one_work+0x9cf/0x1b70\n worker_thread+0x6c8/0xf10\n kthread+0x3c5/0x780\n ret_from_fork+0x56d/0x700\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e\n\nThe problem arises due to the rfkill_block work is not cancelled when wiphy\nis being unregistered. In order to fix the issue cancel the corresponding\nwork in wiphy_unregister().\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."
        }
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        "dateUpdated": "2026-03-25T10:27:26.061Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-03-25T10:27:26.061Z",
    "dateReserved": "2026-01-13T15:37:45.997Z",
    "dateUpdated": "2026-03-25T10:27:26.061Z",
    "state": "PUBLISHED"
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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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