Read the docs
TI-2015-02354 Aliases CVE-2015-2666GHSA-rwf8-4gv4-8fmw

Stack-based buffer overflow in the get_matching_model_microcode function in…

Priority LOW 31CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Code execution
Confidentiality · integrity · availability
Complete · Complete · Complete
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.

Why it matters now

EPSS 0.0042 36th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.9 to before 3.10.83; 3.11 to before 3.12.40; 3.13 to before 3.14.47; 3.15 to before 3.16.35; 3.17 to before 3.18.19VulnerableLinux
cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:*21VulnerableFedoraproject
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.9 to before 3.10.83; 3.11 to before 3.12.40; 3.13 to before 3.14.47; 3.15 to before 3.16.35; 3.17 to before 3.18.19 Vulnerable ·Linux
  • cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* Versions 21 Vulnerable ·Fedoraproject

Remediation

Red Hat 2 advisories

  • RHSA-2015:1534 Released 2015-08-06 · Red Hat rating Moderate
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) kernel-3.10.0-229.11.1.el7, kernel-abi-whitelists-3.10.0-229.11.1.el7, kernel-debug-3.10.0-229.11.1.el7 +7
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-229.11.1.el7, python-perf-3.10.0-229.11.1.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) kernel-3.10.0-229.11.1.el7, kernel-abi-whitelists-3.10.0-229.11.1.el7, kernel-debug-3.10.0-229.11.1.el7 +7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-229.11.1.el7, python-perf-3.10.0-229.11.1.el7
    • Red Hat Enterprise Linux Server (v. 7) kernel-3.10.0-229.11.1.ael7b, kernel-3.10.0-229.11.1.el7, kernel-abi-whitelists-3.10.0-229.11.1.ael7b +20
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-229.11.1.ael7b, kernel-tools-libs-devel-3.10.0-229.11.1.ael7b, kernel-tools-libs-devel-3.10.0-229.11.1.el7 +2
    • Red Hat Enterprise Linux Workstation (v. 7) kernel-3.10.0-229.11.1.el7, kernel-abi-whitelists-3.10.0-229.11.1.el7, kernel-debug-3.10.0-229.11.1.el7 +7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-229.11.1.el7, python-perf-3.10.0-229.11.1.el7
  • RHSA-2015:1565 Released 2015-08-05 · Red Hat rating Moderate
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt-3.10.0-229.11.1.rt56.141.11.el7_1, kernel-rt-debug-3.10.0-229.11.1.rt56.141.11.el7_1, kernel-rt-debug-devel-3.10.0-229.11.1.rt56.141.11.el7_1 +4

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2015:1534
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2015:1534
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2015:1534
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2015:1534
Red Hat Enterprise Linux Realtime (v. 7)Fixed RHSA-2015:1565
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2015:1534
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2015:1534
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2015:1534
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2015:1534
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise MRG 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-2666
  2. 2026-10-03 Alias added: GHSA-rwf8-4gv4-8fmw

References

Patch 1

Advisory 2

Other 3

Sources

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