GHSA-32QR-G6M6-8V7X

Vulnerability from github – Published: 2026-10-23 12:31 – Updated: 2026-10-23 12:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

irqchip/gic-v4: Don't advertise VLPIs if no ITS is probed

When accidentally setting “kvm-arm.vgic_v4_enable=1” on a system that has no MSI controller device tree node and GICv4, it results a panic as “gic_domain” is NULL and the kernel attempts to access it.

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000028
Mem abort info:
  ESR = 0x0000000096000006

CPU: 1 UID: 0 PID: 295 Comm: lkvm-static Not tainted 7.1.0-rc4-ge3f15ad3970e #5 PREEMPT
Hardware name: linux,dummy-virt (DT)
pstate: 81402005 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)
pc : __irq_domain_instantiate+0x1d4/0x578
lr : __irq_domain_instantiate+0x1cc/0x578

Set vLPI support to false at init time if the host has no ITS, so it propagates properly to kvm_vgic_global_state.has_gicv4.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98877"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T12:18:21Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/gic-v4: Don\u0027t advertise VLPIs if no ITS is probed\n\nWhen accidentally setting \u201ckvm-arm.vgic_v4_enable=1\u201d on a system that has\nno MSI controller device tree node and GICv4, it results a panic as\n\u201cgic_domain\u201d is NULL and the kernel attempts to access it.\n\n    Unable to handle kernel NULL pointer dereference at virtual address 0000000000000028\n    Mem abort info:\n      ESR = 0x0000000096000006\n\n    CPU: 1 UID: 0 PID: 295 Comm: lkvm-static Not tainted 7.1.0-rc4-ge3f15ad3970e #5 PREEMPT\n    Hardware name: linux,dummy-virt (DT)\n    pstate: 81402005 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n    pc : __irq_domain_instantiate+0x1d4/0x578\n    lr : __irq_domain_instantiate+0x1cc/0x578\n\nSet vLPI support to false at init time if the host has no ITS, so it\npropagates properly to kvm_vgic_global_state.has_gicv4.",
  "id": "GHSA-32qr-g6m6-8v7x",
  "modified": "2026-10-23T12:31:36Z",
  "published": "2026-10-23T12:31:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98877"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e4cae9f1472ba3c9fe87edee24074618b51f537"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4761493dd663443f7353c184e6fa16e1cb3ac5a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2508b8855acc96abe69be73b41b672f1ef12516"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab233119a19716b8f33e73ea7e092e0eb353cfbf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8a911b3b07baa0aeb3dbc4e16a4670bd21bed40"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e61654fbc3bc5d07ec9fafe29f33e19b2b5d0fd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e79934064be85fc9a3a6434da857307d8b78e33d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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