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TI-2026-79646 Aliases CVE-2026-98889GHSA-2587-vvww-5v6h

Improper length validation in Linux kernel iwlwifi scheduled scans

Priority LOW 33Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 5 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

The Linux kernel from 5.11 contains a flaw in the iwlwifi mvm driver's scheduled scan code. The driver builds the probe request before checking whether the information elements fit, so oversized elements overflow a fixed buffer. A local user with low privileges can corrupt memory and affect confidentiality, integrity and availability.

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: wifi: iwlwifi: mvm: fix sched scan IE sizing Scheduled scan built the probe request before iwl_mvm_scan_fits(), so oversized IEs could be copied into the fixed preq buffer before length validation. Move iwl_mvm_build_scan_probe() after the fits check. Also advertise max_sched_scan_ie_len using iwl_mvm_max_scan_ie_len() so userspace limits account for driver-inserted DS/TPC bytes.

Why it matters now

EPSS 0.00169 6th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.15.222, 6.1.189, 6.6.158 +3Red Hat: 5 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.11 and later5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2Patch availableCNA
  • Linux VendorLinux Affected 5.11 and later Fixed in 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2 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

Linux kernel users should update to 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53 or 7.2, depending on their branch. Red Hat reports no fix plan for Red Hat Enterprise Linux 8, 9 and 10 and OpenShift Container Platform 4 and 5.

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

  • Fix · CNA Linux (Linux) Fixed in 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2

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
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat OpenShift Container Platform 5AffectedNo fix yet: Fix deferred
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-98889
  2. 2026-10-23 Alias added: GHSA-2587-vvww-5v6h
  3. 2026-10-24 CVSS score added · CNA
  4. 2026-10-24 Priority changed: LOW → MEDIUM
  5. 2026-10-24 Priority changed: MEDIUM → LOW
  6. 2026-10-26 Fix available: Linux/Linux@0 · CNA
  7. 2026-10-26 Affected versions changed · Red Hat
  8. 2026-10-26 CVSS score added · Red Hat
  9. 2026-11-06 Affected versions changed · Red Hat

References

Other 6

  • 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 21727 →

Sources

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