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-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.
EPSS 0.02% · 6.3th percentile
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| linux | linux_kernel | 2.6.31, 2.6.31, 2.6.31 |
| Linux | Linux | 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3, 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3, 1f87f7d3a3b42b20f34cb03f0fd1a41c3d0e27f3 |
Exploit Intelligence
- CIRCL seen: CVE-2026-23336 (circl-sighting)
- CIRCL seen: CVE-2026-23336 (circl-sighting)
- CIRCL seen: CVE-2026-23336 (circl-sighting)
- CIRCL published-proof-of-concept: CVE-2026-23336 (circl-sighting)
- https://git.kernel.org/stable/c/82a35356b5c1f75fe6a8a561db44e8d0e49da8f9 (circl)
- https://git.kernel.org/stable/c/b2e9626a9d16b9bbbd06498c9e73c93be354dc7a (circl)
- https://git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940 (circl)
- https://git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173 (circl)
- https://git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449 (circl)
- https://git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 (circl)
…and 22 more exploits
Timeline
- Mar 25, 2026 EPSS Score
- Mar 25, 2026 Coalition ESS Score
- Mar 25, 2026 CVE Published
- Mar 29, 2026 Security Advisory
- Mar 29, 2026 PoC Published
- Mar 31, 2026 Security Advisory
- Mar 31, 2026 Security Advisory
- Mar 31, 2026 Security Advisory
- Mar 31, 2026 Security Advisory
- Mar 31, 2026 Security Advisory
- Mar 31, 2026 Security Advisory
- Mar 31, 2026 Security Advisory
References
- https://git.kernel.org/stable/c/eeea8da43ab86ac0a6b9cec225eec91564346940 url
- https://git.kernel.org/stable/c/fa18639deab4a3662d543200c5bfc29bf4e23173 url
- https://git.kernel.org/stable/c/57e39fe8da573435fa35975f414f4dc17d9f8449 url
- https://git.kernel.org/stable/c/584279ad9ff1e8e7c5494b9fce286201f7d1f9e2 url
- https://git.kernel.org/stable/c/cd2f52944c7b95dcdfe0d87f385a2d96458a3ae5 url
- https://git.kernel.org/stable/c/767d23ade706d5fa51c36168e92a9c5533c351a1 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-23336 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32748 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4438 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23347 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23268 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23392 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23319 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23253 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23296 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23364 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23368 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27654 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-30922 advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23286 advisory
…and 135 more