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CVE-2026-80551— s390/vfio_ccw: Ensure first IDAW remains constant

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，已修复以下漏洞： s390/vfio_ccw：确保第一个 IDAW 保持不变 列表中的第一个 IDAW 与其他 IDAW 不同，它不需要对齐到 2K/4K 边界，因此会被单独读取，以便准确计算读取完整 IDAL 所需的缓冲区大小。 验证从第一个 IDAW 中获取的地址在多次读取之间保持不变，以确保所处理的 IDAW 集合具有一致性。

AI Predicted 5.5 Difficulty: Hard

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 01aa26c672c0eb771de4aaa2a8ccf6055778887b< 0d46c2565f173bcddcdcaf44a4f69789a20535e2 affected
01aa26c672c0eb771de4aaa2a8ccf6055778887b< 08ef2a82115690d6e229615872ac1731af732497 affected
01aa26c672c0eb771de4aaa2a8ccf6055778887b< fc59e9482117ebdccd6dc7fa8082f8b980fd021e affected
01aa26c672c0eb771de4aaa2a8ccf6055778887b< 565bef268d75bf7df665bce6923a88cd0eb74592 affected
5.3 affected
< 5.3 unaffected
6.12.105≤ 6.12.* unaffected
6.18.46≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-80551

Vulnerability Information
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Vulnerability Title
s390/vfio_ccw: Ensure first IDAW remains constant
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Ensure first IDAW remains constant The first IDAW in a list does not need to be on a 2K/4K boundary like all others, and so is read separately to accurately calculate the size of the buffer needed to read the full IDAL. Verify that the address found in the first IDAW is unchanged between reads, to ensure a consistent set of IDAWs being worked with.
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 01aa26c672c0eb771de4aaa2a8ccf6055778887b ~ 0d46c2565f173bcddcdcaf44a4f69789a20535e2 -
Linux Linux 5.3 -

II. Public POCs for CVE-2026-80551

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III. Intelligence Information for CVE-2026-80551

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Patches & Fixes for CVE-2026-80551 (4)

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-2026-80552 s390/vfio_ccw: Ensure index for read/write regions are within range
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-2026-80551

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