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CVE-2026-80553— s390/vfio_ccw: Cancel existing workqueues

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 kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 存在安全漏洞，该漏洞源于io_work和crw_work工作队列未正确清理，导致在私有结构释放后工作仍可能被调度，造成释放后重用。

CVSS 8.8 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1610 · Deploy Container

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux e5f84dbaea59b4f712dac428c337528b70e1c533< 87d569cb35a541b31a184faf982540694d4c9a89 affected
e5f84dbaea59b4f712dac428c337528b70e1c533< 7492ca2d0c5d59add01e267be9f5a6eeb8076fd7 affected
e5f84dbaea59b4f712dac428c337528b70e1c533< b94b28c1f0fae53b2f2d6180ae6442c9a1558f67 affected
e5f84dbaea59b4f712dac428c337528b70e1c533< e868ea8be0bc88c6982f48ecf3259d98afd884ae affected
e5f84dbaea59b4f712dac428c337528b70e1c533< dc47a98abe6714577a25224534dbd356051097a3 affected
e5f84dbaea59b4f712dac428c337528b70e1c533< b7ae0f7993867d009a4b554fc1d6d451c10580a0 affected
e5f84dbaea59b4f712dac428c337528b70e1c533< 77f5e888d2e607a0b3141fb95091ad6ef1cca9a2 affected
e5f84dbaea59b4f712dac428c337528b70e1c533< 79c60b2c61105368dcc8444eb45847e21734f7c4 affected
… +10 more rows
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I. Basic Information for CVE-2026-80553

Vulnerability Information
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Vulnerability Title
s390/vfio_ccw: Cancel existing workqueues
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Cancel existing workqueues The initialization of the io_work and crw_work workqueues begs the question of whether they should be un-initialized. Add the corresponding cleanup tags in _release_dev to ensure work isn't dispatched after the private struct is free'd.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 存在安全漏洞，该漏洞源于io_work和crw_work工作队列未正确清理，导致在私有结构释放后工作仍可能被调度，造成释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e5f84dbaea59b4f712dac428c337528b70e1c533 ~ 87d569cb35a541b31a184faf982540694d4c9a89 -
Linux Linux 4.12 -

II. Public POCs for CVE-2026-80553

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III. Intelligence Information for CVE-2026-80553

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Patches & Fixes for CVE-2026-80553 (5)

Other References for CVE-2026-80553 (3)

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

CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
CVE-2026-80585 9.4 CRITICAL mptcp: fastopen: only mark MPTFO subflows with SYN data
CVE-2026-74751 9.4 CRITICAL riscv: lib: Fix ZBB strnlen reading past count boundary
CVE-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80548 8.8 HIGH s390/vfio_ccw: Selectively expand io_mutex
CVE-2026-80547 8.8 HIGH s390/vfio_ccw: Implement a crw lock
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-2026-80553

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