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CVE-2026-98877

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

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in3e4cae9f1472ba3c9fe87edee24074618b51f537Also 4761493dd663443f7353c184e6fa16e1cb3ac5a1, 5.10.271 and 5 moreCVE List
Published23 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

Show all 8 fixed versions

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 20

  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3e4cae9f1472ba3c9fe87edee24074618b51f537CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a2508b8855acc96abe69be73b41b672f1ef12516CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e79934064be85fc9a3a6434da857307d8b78e33dCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4761493dd663443f7353c184e6fa16e1cb3ac5a1CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ab233119a19716b8f33e73ea7e092e0eb353cfbfCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c8a911b3b07baa0aeb3dbc4e16a4670bd21bed40CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e61654fbc3bc5d07ec9fafe29f33e19b2b5d0fd5CVE List
  • Linuxaffected: all versions before 5.10.271CVE List
  • Linuxaffected: all versions before 5.15.222CVE List
  • Linuxaffected: all versions before 6.1.189CVE List
  • Linuxaffected: all versions before 6.6.158CVE List
  • Linuxaffected: all versions before 6.12.111CVE List
  • Linuxaffected: all versions before 6.18.53CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2CVE List

References 7