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TI-2026-75840 Aliases CVE-2026-98712GHSA-fqwg-6qxx-rx2q

Missing refcount on interrupts in Linux kernel KVM arm64 vGIC

Priority LOW 22Published · Updated

Key facts

Attack vector
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Privileges required
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User interaction
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Attack complexity
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Impact type
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Confidentiality · integrity · availability
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Fix status
Partial Red Hat: 1 without a fix

No CVSS vector from any source. Fix status from CNA and Red Hat.

Summary

The Linux kernel KVM arm64 vGIC code from 6.19.9 before 6.20 and from 7.0 is affected. The last_lr_irq pointer references the last interrupt inserted into a list register without holding a refcount, so a concurrently unmapped LPI can vanish while still referenced. The fix takes a refcount on that interrupt when last_lr_irq is populated and drops it in vgic_prune_ap_list() when LPIs are reclaimed.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

EPSS 0.00155 4th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.20, 7.2.10, 7.3Red Hat: 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.19.9 to before 6.206.20Patch availableCNA
LinuxLinux7.0 and later7.2.10, 7.3Patch availableCNA
  • Linux VendorLinux Affected 6.19.9 to before 6.20 Fixed in 6.20 Patch available CNA
  • Linux VendorLinux Affected 7.0 and later Fixed in 7.2.10, 7.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

Upgrade the Linux kernel to 6.20 for the 6.19.9 line, or to 7.2.10 or 7.3 for the 7.x line. The sources list no fixed version for Red Hat Enterprise Linux 10.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Linux (Linux) Fixed in 6.20
  • Fix · CNA Linux (Linux) Fixed in 7.2.10, 7.3

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Not affected: 6 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-98712
  2. 2026-10-18 Alias added: GHSA-fqwg-6qxx-rx2q
  3. 2026-10-19 Fix available: Linux/[email protected] · CNA
  4. 2026-10-23 Affected versions changed · Red Hat
  5. 2026-10-23 CVSS score added · Red Hat
  6. 2026-11-06 Affected versions changed · Red Hat

References

Other 2

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
See all 21741 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences