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CVE-2026-80552— s390/vfio_ccw: Ensure index for read/write regions are within range

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： s390/vfio_ccw：确保读写区域的索引在有效范围内 在引入能力链（capability chain）时，虽然正确地将能力自身的区域索引限制在了有效范围内，但忽略了同样需要对现有的读写区域强制实施索引范围检查。

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux db8e5d17ac03a65e2e0ee0ba50bf61a99741d871< d3b1e38404b22df5a1f93019f2bb656feaad5ae3 affected
db8e5d17ac03a65e2e0ee0ba50bf61a99741d871< 79ea5e0c4c8a9842ae85f45062d947b3297dfc07 affected
db8e5d17ac03a65e2e0ee0ba50bf61a99741d871< d597fa1273802941c7801202135976fecc29672b affected
db8e5d17ac03a65e2e0ee0ba50bf61a99741d871< 649badf3a2fd8929e40198603a2cb21b74c21700 affected
db8e5d17ac03a65e2e0ee0ba50bf61a99741d871< 988d9b5be3c2c4baf9457ce8e11b477e13eb9fcf affected
db8e5d17ac03a65e2e0ee0ba50bf61a99741d871< 9f5f9a78fedc45bc29d6a0a64e3a3472361afae5 affected
5.2 affected
< 5.2 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-80552

Vulnerability Information
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Vulnerability Title
s390/vfio_ccw: Ensure index for read/write regions are within range
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Ensure index for read/write regions are within range The introduction of the capability chain rightly clamped the region indexes to the range of the capabilities itself, but neglected to do so for the existing read/write regions which should also be enforced.
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 ~ d3b1e38404b22df5a1f93019f2bb656feaad5ae3 -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-80552

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III. Intelligence Information for CVE-2026-80552

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Patches & Fixes for CVE-2026-80552 (5)

Other References for CVE-2026-80552 (1)

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

CVE-2026-80556 mmc: atmel-mci: Fix use-after-free in atmci_remove due to race condition
CVE-2026-80554 s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80551 s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80549 s390/vfio_ccw: Move cp cleanup out of not operational
CVE-2026-80546 s390/zcrypt: Improve CCA CPRB length and overflow checks
CVE-2026-80547 s390/vfio_ccw: Implement a crw lock
CVE-2026-80545 s390/zcrypt: Improve EP11 CPRB length and overflow checks
CVE-2026-80543 s390/zcrypt: Pad trailing CCA or EP11 message with zeros
CVE-2026-80548 s390/vfio_ccw: Selectively expand io_mutex
CVE-2026-80557 libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80555 s390/vfio_ccw: Free all memory if cp_init() fails
CVE-2026-80559 Input: sur40 - fix input device registration ordering
CVE-2026-80558 libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-80560 openrisc: signal: do not restore privileged SR bits on sigreturn
CVE-2026-80561 libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-80562 gpio: ml-ioh: use raw_spinlock_t for the register lock
CVE-2026-80563 gpio: sloppy-logic-analyzer: fix use-after-free via debugfs trigger on unbind
CVE-2026-80564 gve: fix NULL dereference due to missing ptp adjfine
CVE-2026-80565 crypto: qce - fix error path in devm_qce_register_algs
CVE-2026-80566 Input: hynitron_cstxxx - validate touch count and finger IDs

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-2026-80552

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