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CVE-2026-98712— KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq

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： KVM: arm64: vgic：对 last_lr_irq 引用的中断增加引用计数。 引用最后插入到 LRI（LPI 重定向寄存器）中的中断存在脆弱性，因为如果发生并发解映射 LPI（本地物理中断）操作，该中断可能会消失。 解决方案是：在填充 last_lr_irq 时增加该中断的引用计数，并在 vgic_prune_ap_list() 调用时（即 LPI 被回收时）释放该引用计数。

AI Predicted 7.8 Difficulty: Hard EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1069 · Permission Groups Discovery

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 6da5e537f5afe091658e846da1949d7e557d2ade< 8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c affected
6da5e537f5afe091658e846da1949d7e557d2ade< 19bc5d79ece613f242b5ec03921a3b465321bfed affected
cd28ca4c27ed5929f61bbed8a967c20519facb88 affected
6.19.9< 6.20 affected
7.0 affected
< 7.0 unaffected
7.2.10≤ 7.2.* unaffected
7.3≤ * unaffected
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I. Basic Information for CVE-2026-98712

Vulnerability Information
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Vulnerability Title
KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq Referencing the last interrupt inserted in an LR is rather fragile, as this interrupt can vanish if a concurrently unmapped LPI. Solve this by bumping up the refcount on the interrupt when populating last_lr_irq, and drop it at vgic_prune_ap_list() time, when LPIs are being reclaimed.
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 6da5e537f5afe091658e846da1949d7e557d2ade ~ 8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c -
Linux Linux 7.0 -

II. Public POCs for CVE-2026-98712

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III. Intelligence Information for CVE-2026-98712

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Patches & Fixes for CVE-2026-98712 (2)

Same Patch Batch · Linux · 2026-10-18 · 435 CVEs total

CVE-2026-98720 KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified
CVE-2026-98733 Bluetooth: hci_core: Serialize fragmented ISO packet queueing
CVE-2026-98732 Bluetooth: btintel: fix buffer over-read in btintel_hw_error()
CVE-2026-98731 Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
CVE-2026-98730 Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()
CVE-2026-98729 x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h
CVE-2026-98728 tpm: fix off-by-four bounds check in tpm2_get_random()
CVE-2026-98727 nvme-multipath: set BLK_FEAT_ZONED only after the zone info is known
CVE-2026-98726 nvme-multipath: fix underflow in ANA log bounds checks
CVE-2026-98725 nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
CVE-2026-98724 nvmet: pci-epf: reject too-short SGL segments
CVE-2026-98723 nvmet: copy the hostid into the ctrl before creating PR pc_refs
CVE-2026-98722 mtd: block2mtd: Fix divide error when erase_size is zero
CVE-2026-98721 mtd: rawnand: cadence: Initialize IRQ state before requesting IRQ
CVE-2026-98707 wifi: mac80211: shut down RX BA session timer on teardown
CVE-2026-98711 wifi: cw1200: fix TX padding OOB read leaking heap data to device
CVE-2026-98710 wifi: iwlegacy: 3945: free EEPROM data on remove
CVE-2026-98709 wifi: mac80211: count only matching reservations in reserved switch
CVE-2026-98713 KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT
CVE-2026-98708 wifi: mac80211: keep paired old chanctx alive

Showing top 20 of 435 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98712

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