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CVE-2026-68454— KVM: s390: pci: Fix handling of AIF enable without AISB

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 6.0版本存在安全漏洞，该漏洞源于KVM s390 pci模块在处理未指定AISB的AIF启用时，关联的GAITE存储了无效物理地址，可能导致系统异常。

CVSS 8.8 · High EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1205 · Traffic Signaling

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< f887df91826e72b570c5e9298e66dd929f09edde affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< 3ef3190e30601b2688bdc64169b938b8d7f42010 affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< d48b9b096d11e31690c0a4988f65f21b64c01b2a affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< df72596278b0e22dac5ef2881e9221a3a2c4ed11 affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< 124a3769c43713a11a93a821b313e61ad5110cb8 affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< 3e3aa6da87d30a0064a17b836685cd43c90a3572 affected
6.0 affected
< 6.0 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-68454

Vulnerability Information
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Vulnerability Title
KVM: s390: pci: Fix handling of AIF enable without AISB
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix handling of AIF enable without AISB When a guest seeks to register IRQs without a summary bit specified, ensure that the associated GAITE then stores 0 for the guest AISB location instead of virt_to_phys(page_address(NULL)).
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 6.0版本存在安全漏洞，该漏洞源于KVM s390 pci模块在处理未指定AISB的AIF启用时，关联的GAITE存储了无效物理地址，可能导致系统异常。
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 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc ~ f887df91826e72b570c5e9298e66dd929f09edde -
Linux Linux 6.0 -

II. Public POCs for CVE-2026-68454

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III. Intelligence Information for CVE-2026-68454

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Patches & Fixes for CVE-2026-68454 (6)

Same Patch Batch · Linux · 2026-08-13 · 4 CVEs total

CVE-2026-68451 7.8 HIGH s390/zcrypt: Validate length for CCA ECC private key requests
CVE-2026-68452 7.8 HIGH s390/zcrypt: Validate length for CCA AES cipher key requests
CVE-2026-68453 7.1 HIGH s390/zcrypt: Fix buffer over-read in cca_cipher2protkey

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68454

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