{"id":"CVE-2026-98877","title":"irqchip/gic-v4: Don't advertise VLPIs if no ITS is probed","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/gic-v4: Don't advertise VLPIs if no ITS is probed\n\nWhen accidentally setting “kvm-arm.vgic_v4_enable=1” on a system that has\nno MSI controller device tree node …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3e4cae9f1472ba3c9fe87edee24074618b51f537","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a2508b8855acc96abe69be73b41b672f1ef12516","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e79934064be85fc9a3a6434da857307d8b78e33d","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4761493dd663443f7353c184e6fa16e1cb3ac5a1","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ab233119a19716b8f33e73ea7e092e0eb353cfbf","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c8a911b3b07baa0aeb3dbc4e16a4670bd21bed40","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e61654fbc3bc5d07ec9fafe29f33e19b2b5d0fd5","Linux < 5.10.271","Linux < 5.15.222","Linux < 6.1.189","Linux < 6.6.158","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T11:37:23.678Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98877","references":[{"url":"https://git.kernel.org/stable/c/3e4cae9f1472ba3c9fe87edee24074618b51f537"},{"url":"https://git.kernel.org/stable/c/a2508b8855acc96abe69be73b41b672f1ef12516"},{"url":"https://git.kernel.org/stable/c/e79934064be85fc9a3a6434da857307d8b78e33d"},{"url":"https://git.kernel.org/stable/c/4761493dd663443f7353c184e6fa16e1cb3ac5a1"},{"url":"https://git.kernel.org/stable/c/ab233119a19716b8f33e73ea7e092e0eb353cfbf"},{"url":"https://git.kernel.org/stable/c/c8a911b3b07baa0aeb3dbc4e16a4670bd21bed40"},{"url":"https://git.kernel.org/stable/c/e61654fbc3bc5d07ec9fafe29f33e19b2b5d0fd5"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.583Z","slug":"CVE-2026-98877","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/gic-v4: Don't advertise VLPIs if no ITS is probed\n\nWhen accidentally setting “kvm-arm.vgic_v4_enable=1” on a system that has\nno MSI controller device tree node and GICv4, it results a panic as\n“gic_domain” 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.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3e4cae9f1472ba3c9fe87edee24074618b51f537`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a2508b8855acc96abe69be73b41b672f1ef12516`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e79934064be85fc9a3a6434da857307d8b78e33d`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4761493dd663443f7353c184e6fa16e1cb3ac5a1`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ab233119a19716b8f33e73ea7e092e0eb353cfbf`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c8a911b3b07baa0aeb3dbc4e16a4670bd21bed40`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e61654fbc3bc5d07ec9fafe29f33e19b2b5d0fd5`\n- `Linux < 5.10.271`\n- `Linux < 5.15.222`\n- `Linux < 6.1.189`\n- `Linux < 6.6.158`\n- `Linux < 6.12.111`\n- `Linux < 6.18.53`\n- `Linux (all versions)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}