CVE-2026-80589— 磁盘块：释放未添加磁盘时停止超时定时器
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
在 Linux 内核中，已修复以下漏洞： block: 在释放一个从未被添加的磁盘时停止超时定时器 对于在 之前探测失败的磁盘， 会撤销 的操作，但它仅调用了 。该函数中没有任何地方去停止 定时器，导致该定时器继续向前滚动：它会保持“待处理”状态直到其自身到期，而不是在最后一个请求完成时停止。因此，如果驱动在添加磁盘之前已经发出了任何 I/O 请求， 结构体仍被链接在一个定时器轮（timer wheel）的某个桶中时，就被释放了。 提交 （"block: simplify disk shutdown"）删除了原本用
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一、 漏洞 CVE-2026-80589 基础信息
漏洞信息
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Vulnerability Title
block: stop the timeout timer when releasing a never added disk
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
block: stop the timeout timer when releasing a never added disk
disk_release() undoes blk_mq_init_allocated_queue() for a disk whose
probe failed before add_disk(), but it only calls blk_mq_exit_queue().
Nothing there stops q->timeout, and that timer rolls forward: it stays
pending until it next expires, not until the last request completes.
So if the driver issued any I/O before adding the disk, the
request_queue is freed while still linked into a timer wheel bucket.
Commit 6f8191fdf41d ("block: simplify disk shutdown") dropped the
blk_cleanup_queue() call that used to stop it. __del_gendisk() and
blk_mq_destroy_queue() still do; only the probe failure path lost it.
nvme gets there because nvme_update_ns_info() submits Report Zones or
FDP io-mgmt-recv on ns->queue before the disk is added, so a later
failure - a concurrent reset setting NVME_CTRL_FROZEN, or
device_add_disk() failing - lands in put_disk() with the timer armed:
BUG: KASAN: slab-use-after-free in detach_if_pending+0x30c/0x340
Write of size 8 at addr ffff888004d71310 by task kworker/u8:2/37
__timer_delete_sync+0x156/0x240 kernel/time/timer.c:1621
blk_sync_queue+0x22/0x40 block/blk-core.c:222
nvme_sync_queues+0x100/0x150 drivers/nvme/host/core.c:5362
nvme_reset_work+0x138/0x930 drivers/nvme/host/pci.c:3264
Allocated by task 34:
__blk_mq_alloc_disk+0x33/0x100 block/blk-mq.c:4462
nvme_alloc_ns+0x290/0x3870 drivers/nvme/host/core.c:4146
Freed by task 0:
blk_free_queue_rcu+0x3a/0x50 block/blk-core.c:254
rcu_core+0xc10/0x1730 kernel/rcu/tree.c:2857
The queue being synced there is ctrl->admin_q, only a victim sharing a
timer wheel bucket with the freed queue's dangling entry; other runs
tripped in enqueue_timer(), __run_timers() or blk_mq_timeout_work().
Failing nvme_alloc_ns() with a debug patch makes it deterministic: one
leaked timer trips KASAN within seconds, while 1987 patched releases
produced no splat.
Stop the timer and the queue work items before blk_mq_exit_queue(), like
blk_mq_destroy_queue() does.
Found by FuzzNvme.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-80589 的公开POC
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CVE-2026-80589 补丁与修复 (6)
同批安全公告 · Linux · 2026-08-26 · 共 92 条
| CVE-2026-80557 | libceph 2.0 越界读取漏洞 | |
| CVE-2026-80553 | s390/vfio_ccw 队列取消机制 | |
| CVE-2026-80552 | s390/vfio_ccw 缓冲区溢出漏洞 | |
| CVE-2026-80549 | s390 vfio_ccw 清理逻辑修复 | |
| CVE-2026-80546 | s390 zcrypt CCA CPRB长度溢出检查 | |
| CVE-2026-80547 | s390/vfio_ccw: 实现 CRW 锁 | |
| CVE-2026-80545 | Linux内核 s390 加密子系统缓冲区溢出漏洞 | |
| CVE-2026-80543 | s390/zcrypt: 用零填充 CCA 或 EP11 消息 | |
| CVE-2026-80548 | s390 VFIO 条件变量竞态条件 | |
| CVE-2026-80555 | s390/vfio_ccw 内存释放漏洞 | |
| CVE-2026-80554 | Linux s390/vfio_ccw 通道程序段数限制 | |
| CVE-2026-80556 | Linux内核 atmel-mci驱动释放后使用漏洞 | |
| CVE-2026-80559 | Sur40 输入设备注册顺序修复 | |
| CVE-2026-80558 | Ceph libceph 模块 OSID 索引缺陷 | |
| CVE-2026-80560 | OpenRISC 信号处理 权限位恢复错误 | |
| CVE-2026-80561 | libceph 多个不安全解码远程代码执行漏洞 | |
| CVE-2026-80562 | 内核 gpio ml-ioh 注册表锁机制优化 | |
| CVE-2026-80563 | Linux内核GPIO驱动解绑时释放后使用漏洞 | |
| CVE-2026-80564 | gve 驱动因缺少 ptp adjfine 空指针解引用 | |
| CVE-2026-80565 | Linux Kernel qce 驱动内存管理错误 |
显示前 20 条，共 92 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-80589
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