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CVE-2026-80684— KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

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KVM s390 PCI子系统在AIBV分配失败时未检查airq_iv_create()的返回值，可能导致空指针解引用。

CVSS 9.3 · Critical EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< 96099486b63985801c9c6ef22505e9aa635b2d20 affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< 0a95abe964400771ad82b027d7b84a0d183cd0db affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< df947d85e164a50a29d43a96e814f69ab1d0f7ed affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< e137d082325bbcae780087b57501d38585e625d9 affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< d1a103dc9016c25e7423ce5841a5cc2df76d59f3 affected
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc< 8bf09b9b7d3232806df95f409581f8a9fd99a3fa affected
6.0 affected
< 6.0 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-80684

Vulnerability Information
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Vulnerability Title
KVM: s390: pci: Fix NULL dereference on AIBV allocation failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix NULL dereference on AIBV allocation failure The airq_iv_create() can return NULL on failure, but the return value was never checked. If it fails, zdev->aibv will be NULL and fail when dereferenced in kvm_zpci_set_airq(). Add a NULL check and free the previously allocated AISB bit and zdev->aisb on failure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/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KVM s390 PCI子系统在AIBV分配失败时未检查airq_iv_create()的返回值，可能导致空指针解引用。
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 3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc ~ 96099486b63985801c9c6ef22505e9aa635b2d20 -
Linux Linux 6.0 -

II. Public POCs for CVE-2026-80684

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III. Intelligence Information for CVE-2026-80684

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Patches & Fixes for CVE-2026-80684 (6)

Same Patch Batch · Linux · 2026-08-28 · 135 CVEs total

CVE-2026-80694 9.8 CRITICAL net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
CVE-2026-80668 9.8 CRITICAL netfilter: nf_conntrack_expect: use conntrack GC to reap expectations
CVE-2026-80634 9.8 CRITICAL netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag
CVE-2026-80673 9.8 CRITICAL ntfs: bound the look-ahead attribute-list entry in ntfs_external_attr_find()
CVE-2026-80630 9.8 CRITICAL net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restorin
CVE-2026-80617 9.8 CRITICAL net: airoha: fix foe_check_time allocation size
CVE-2026-80612 9.8 CRITICAL net: lwtunnel: Drop skb metadata before LWT encapsulation
CVE-2026-80714 9.8 CRITICAL ipvs: do not propagate one-packet flag to synced conns
CVE-2026-80609 9.8 CRITICAL qede: fix out-of-bounds check for cqe->len_list[]
CVE-2026-80681 9.8 CRITICAL vxlan: re-fetch eth header after route_shortcircuit()
CVE-2026-80600 9.8 CRITICAL batman-adv: dat: acquire ARP hw source only after skb realloc
CVE-2026-80674 9.8 CRITICAL ntfs: validate resident attribute lists and harden the validator
CVE-2026-80671 9.3 CRITICAL perf sched: Fix register_pid() overflow, strcpy, and BUG_ON
CVE-2026-80693 9.3 CRITICAL idpf: bound interrupt-vector register fill to the allocated array
CVE-2026-80670 9.1 CRITICAL perf tools: Use perf_env__get_cpu_topology() in machine__resolve()
CVE-2026-80603 9.1 CRITICAL netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read
CVE-2026-80633 8.8 HIGH iommufd: Take dma_resv lock before dma_buf_unpin() in release path
CVE-2026-80683 8.8 HIGH Bluetooth: SCO: give the socket its own sco_conn reference
CVE-2026-80672 8.8 HIGH ntfs: fix u16 truncation of restart-area length check
CVE-2026-80692 8.8 HIGH Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80684

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