CVE-2026-97582— hwmon: (gpio-fan) Fix use-after-free in alarm work
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.
在 Linux 内核中，以下漏洞已得到修复： hwmon: (gpio-fan) 修复 alarm 工作队列中的使用后即释放（use-after-free）问题 会将 排队，但没有任何机制对其进行取消。 会解引用 及其对应的 hwmon 设备。在设备解绑（unbind）过程中，设备资源管理（devres）会先释放中断请求，而该释放操作仅等待中断处理函数自身执行完毕，随后便释放 hwmon 设备和 数据结构。这导致在 和 hwmon 设备已被释放之后，仍可能有一个待处理的 工作队列被执行，从而引发使用后即释放漏洞。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege EscalationAffected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | d6fe1360f42e86262153927986dea6502daff703< 594c62eea7c82f526054496e9fa9b895122a8016 |
affected |
d6fe1360f42e86262153927986dea6502daff703< 6e67d9bdac810edacef78cbaeedd34445aa8ceb7 |
affected | ||
d6fe1360f42e86262153927986dea6502daff703< e9fc7d53b2eb34c0a607d1659f49b46911aaf16c |
affected | ||
d6fe1360f42e86262153927986dea6502daff703< 9b12bd724db9db318e3a68be17693583dc29a066 |
affected | ||
d6fe1360f42e86262153927986dea6502daff703< 30755d3a5782cd704c8921cac8ee66dffe4383ea |
affected | ||
d6fe1360f42e86262153927986dea6502daff703< c6ab7f855891877a16d2e2ddf0cd0305fd098a85 |
affected | ||
d6fe1360f42e86262153927986dea6502daff703< a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293 |
affected | ||
2.6.37 |
affected | ||
| … +8 more rows | |||
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I. Basic Information for CVE-2026-97582
Vulnerability Information
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Vulnerability Title
hwmon: (gpio-fan) Fix use-after-free in alarm work
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (gpio-fan) Fix use-after-free in alarm work
fan_alarm_irq_handler() queues fan_data->alarm_work, but nothing
cancels it. fan_alarm_notify() dereferences fan_data and its hwmon
device. On unbind, devres frees the interrupt, which only waits for
the handler itself, and then releases the hwmon device and fan_data,
so a pending fan_alarm_notify() can run after those frees.
Replace INIT_WORK() with devm_work_autocancel(), registered before
devm_request_irq(). The devres cleanup then frees the interrupt
first, so no new work can be queued, and cancels the work while
fan_data and the hwmon device are still alive.
This issue was found by an in-house static analysis tool.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-97582
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-97582 (7)
Same Patch Batch · Linux · 2026-09-25 · 372 CVEs total
| CVE-2026-100075 | 9.8 CRITICAL | RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters |
| CVE-2026-97957 | 8.8 HIGH | net: hinic: fix mailbox segment buffer overflow |
| CVE-2026-97527 | 8.8 HIGH | scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock |
| CVE-2026-97528 | 8.8 HIGH | scsi: qla2xxx: Unlink NVMe unsol ctx before freeing on LS reject error |
| CVE-2026-97555 | 8.8 HIGH | smb: client: fix heap overflow in DACL owner/group rewrite |
| CVE-2026-98115 | 8.8 HIGH | ksmbd: safely drain sessions during logoff |
| CVE-2026-97525 | 8.2 HIGH | x86/mm/pat: Allocate split page tables as kernel page tables |
| CVE-2026-97573 | 8.1 HIGH | bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset() |
| CVE-2026-97570 | 8.1 HIGH | bnxt_en: Bound SW TPA IDs to prevent crashes |
| CVE-2026-98070 | 8.1 HIGH | net/rds: acquire RDS_IN_XMIT in rds_tcp_reset_callbacks() |
| CVE-2026-98069 | 8.1 HIGH | net/rds: acquire the fastpath locks in rds_conn_shutdown() |
| CVE-2026-98130 | 8.1 HIGH | sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START |
| CVE-2026-98116 | 7.8 HIGH | ALSA: pcm: Serialize PCM mmap with buffer reallocation to fix page UAF |
| CVE-2026-97903 | 7.8 HIGH | exit: hold a reference to thread_pid across proc_flush_pid |
| CVE-2026-97548 | 7.8 HIGH | xfs: fix the rtrmap and rtrefcount _maxlevels_ondisk functions |
| CVE-2026-97611 | 7.8 HIGH | net: openvswitch: fix use-after-free of the flow table mask array |
| CVE-2026-97612 | 7.8 HIGH | net: mpls: clear inner_protocol when the last label is popped |
| CVE-2026-98073 | 7.8 HIGH | net: Remove conflicting altnames for dying netns in __dev_change_net_namespace(). |
| CVE-2026-97602 | 7.8 HIGH | inet: frags: invalidate queues before flushing them |
| CVE-2026-97577 | 7.8 HIGH | media: verisilicon: rockchip: reject AV1 frames exceeding the tile capacity |
Showing top 20 of 372 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-97582
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