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CVE-2026-80549— s390/vfio_ccw: Move cp cleanup out of not operational

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.

Linux 内核中修复了以下漏洞： s390/vfio_ccw：将 cp 清理逻辑移出“非运行状态”处理函数 例程会在设备丢失（即定义上不再处于运行状态）时被调用。由于这种情况可能异步发生，偏离了驱动的正常行为，因此清理操作可能在持有其他锁的情况下执行（尤其是在调用链中持有 cio 子通道锁时）。 将 资源的清理操作移至工作队列（workqueue）中执行，使其能够在上述锁序列之外完成，从而为后续补丁安全地管理锁的获取与释放提供空间。

CVSS 8.2 · High

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 204b394a23ad5e30944f23518e21e844614da2ff< f98a9890ca42f4223d2d4c50e0660af3e012fcb4 affected
204b394a23ad5e30944f23518e21e844614da2ff< 4e3301e2a651d742c05914f6074a25b8e41bce19 affected
204b394a23ad5e30944f23518e21e844614da2ff< af1759d8e6e6da9ba94f30a2f92546f406899aa7 affected
204b394a23ad5e30944f23518e21e844614da2ff< 56100baa0eb7055b1026dfa73e696e8066ff71fd affected
204b394a23ad5e30944f23518e21e844614da2ff< 0c11f61a876ed6fcca53d442ed3f33ea8362a0f9 affected
6.0 affected
< 6.0 unaffected
6.6.153≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2026-80549

Vulnerability Information
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Vulnerability Title
s390/vfio_ccw: Move cp cleanup out of not operational
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Move cp cleanup out of not operational The fsm_notoper() routine is called when the device has been lost, and is (by definition) no longer operational. Since this can happen asynchronously from the normal behavior of the driver, the cleanup may happen when holding other locks in the calling sequence (notably, the cio subchannel lock). Push the cleanup of the private->cp resources to a workqueue, where it can be done out from under that lock sequence and a future patch can safely manage the locking requirements.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 204b394a23ad5e30944f23518e21e844614da2ff ~ f98a9890ca42f4223d2d4c50e0660af3e012fcb4 -
Linux Linux 6.0 -

II. Public POCs for CVE-2026-80549

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III. Intelligence Information for CVE-2026-80549

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Patches & Fixes for CVE-2026-80549 (3)

Other References for CVE-2026-80549 (1)

Same Patch Batch · Linux · 2026-08-26 · 92 CVEs total

CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74751 9.4 CRITICAL riscv: lib: Fix ZBB strnlen reading past count boundary
CVE-2026-80585 9.4 CRITICAL mptcp: fastopen: only mark MPTFO subflows with SYN data
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80553 8.8 HIGH s390/vfio_ccw: Cancel existing workqueues
CVE-2026-80552 8.8 HIGH s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80576 8.8 HIGH drm/amdgpu: reject oversized IBs with per-ring packet limits

Showing top 20 of 92 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80549

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