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TI-2026-18878 Aliases CVE-2026-23443GHSA-gh6m-4cqq-86hr

ACPI: processor: Fix previous acpi_processor_errata_piix4() fix

Priority LOW 24CWE-476Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: Fix previous acpi_processor_errata_piix4() fix After commi f132e089fe89 ("ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()"), device pointers may be dereferenced after dropping references to the device objects pointed to by them, which may cause a use-after-free to occur. Moreover, debug messages about enabling the errata may be printed if the errata flags corresponding to them are unset. Address all of these issues by moving message printing to the points in the code where the errata flags are set.

Why it matters now

EPSS 0.00124 2nd percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.15.203, 6.1.167, 6.6.130 +3

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.15.202 to before 5.15.203; 6.1.165 to before 6.1.167; 6.6.128 to before 6.6.130; 6.12.75 to before 6.12.78; 6.18.16 to before 6.18.20; 6.19.6 to before 6.19.105.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10Patch availableCNA
  • Linux VendorLinux Affected 5.15.202 to before 5.15.203; 6.1.165 to before 6.1.167; 6.6.128 to before 6.6.130; 6.12.75 to before 6.12.78; 6.18.16 to before 6.18.20; 6.19.6 to before 6.19.10 Fixed in 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.1.165 to before 6.1.167; 6.6.128 to before 6.6.130; 6.12.75 to before 6.12.78; 6.18.16 to before 6.18.20; 6.19.6 to before 6.19.10VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.15.202:*:*:*:*:*:*:*5.15.202VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.1.165 to before 6.1.167; 6.6.128 to before 6.6.130; 6.12.75 to before 6.12.78; 6.18.16 to before 6.18.20; 6.19.6 to before 6.19.10 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.15.202:*:*:*:*:*:*:* Versions 5.15.202 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 5 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23443
  2. 2026-10-03 Alias added: GHSA-gh6m-4cqq-86hr

References

Patch 7

  • 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-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
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

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