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CVE-2026-80547— s390/vfio_ccw: Implement a crw lock

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s390/vfio_ccw的CRW区域管理异步事件payload列表时缺少锁保护，导致并发读取时存在竞态条件，可能造成释放后重用，攻击者利用该漏洞可导致权限提升或系统崩溃。

CVSS 8.8 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1217 · Browser Information Discovery

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 3f02cb2fd9d2d9e8762102886e3e4b51285797ee< 3c94d4179bcc19e01b28db634c07a58b28116209 affected
3f02cb2fd9d2d9e8762102886e3e4b51285797ee< 0edd222730a9d7ec98368aaf1d40ee2d8d862e61 affected
3f02cb2fd9d2d9e8762102886e3e4b51285797ee< a3d60ae24183eee352c8e87a0ff94c97cd87f156 affected
3f02cb2fd9d2d9e8762102886e3e4b51285797ee< 49fa26b0df009dc1f420980bd71780e70615b83b affected
3f02cb2fd9d2d9e8762102886e3e4b51285797ee< 7902be374cbfc11c3435e1e87bf22195bf06a558 affected
3f02cb2fd9d2d9e8762102886e3e4b51285797ee< c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9 affected
3f02cb2fd9d2d9e8762102886e3e4b51285797ee< 16b0798024c0e9117e395829ddbbe70981c79d9c affected
5.8 affected
… +8 more rows
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I. Basic Information for CVE-2026-80547

Vulnerability Information
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Vulnerability Title
s390/vfio_ccw: Implement a crw lock
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Implement a crw lock Unlike the channel_program struct, which covers synchronous I/O submissions and asynchronous interrupts, the CRW region relies exclusively on asynchronous events coming from hardware. Implement a lock to manage the list of those payloads, to ensure they are read cohesively.
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s390/vfio_ccw的CRW区域管理异步事件payload列表时缺少锁保护，导致并发读取时存在竞态条件，可能造成释放后重用，攻击者利用该漏洞可导致权限提升或系统崩溃。
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 3f02cb2fd9d2d9e8762102886e3e4b51285797ee ~ 3c94d4179bcc19e01b28db634c07a58b28116209 -
Linux Linux 5.8 -

II. Public POCs for CVE-2026-80547

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III. Intelligence Information for CVE-2026-80547

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Patches & Fixes for CVE-2026-80547 (4)

Other References for CVE-2026-80547 (2)

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-2026-80586 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-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-74737 9.8 CRITICAL net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
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-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
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-2026-80552 8.8 HIGH s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80553 8.8 HIGH s390/vfio_ccw: Cancel existing workqueues
CVE-2026-80548 8.8 HIGH s390/vfio_ccw: Selectively expand io_mutex

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-2026-80547

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