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TI-2015-07024 Aliases CVE-2015-8539GHSA-6m9m-6qjp-9mm8

The KEYS subsystem in the Linux kernel before 4.4 allows local users to gain privileges…

Priority LOW 34CWE-269Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-269.

Summary

The KEYS subsystem in the Linux kernel before 4.4 allows local users to gain privileges or cause a denial of service (BUG) via crafted keyctl commands that negatively instantiate a key, related to security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and security/keys/user_defined.c.

Why it matters now

EPSS 0.00423 36th percentileScored 2026-11-07
Fix Fixed Red Hat: 3 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 · 6

CPEVersionsRoleVendor
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*12.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*14.04VulnerableCanonical
cpe:2.3:o:suse:linux_enterprise_real_time_extension:12:sp1:*:*:*:*:*:*12 sp1VulnerableSUSE
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 4.4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:4.4:rc1:*:*:*:*:*:*4.4 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:4.4:rc2:*:*:*:*:*:*4.4 rc2VulnerableLinux
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* Versions 12.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:suse:linux_enterprise_real_time_extension:12:sp1:*:*:*:*:*:* Versions 12 sp1 Vulnerable ·SUSE
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:4.4:rc1:*:*:*:*:*:* Versions 4.4 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:4.4:rc2:*:*:*:*:*:* Versions 4.4 rc2 Vulnerable ·Linux

Remediation

Red Hat 3 advisories

  • RHSA-2018:0181 Released 2018-01-25 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-1:3.10.0-693.17.1.rt56.604.el6rt, kernel-rt-debug-1:3.10.0-693.17.1.rt56.604.el6rt, kernel-rt-debug-devel-1:3.10.0-693.17.1.rt56.604.el6rt +7
  • RHSA-2018:0152 Released 2018-01-25 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt-3.10.0-693.17.1.rt56.636.el7, kernel-rt-debug-3.10.0-693.17.1.rt56.636.el7, kernel-rt-debug-devel-3.10.0-693.17.1.rt56.636.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-693.17.1.rt56.636.el7, kernel-rt-debug-3.10.0-693.17.1.rt56.636.el7, kernel-rt-debug-devel-3.10.0-693.17.1.rt56.636.el7 +7
  • RHSA-2018:0151 Released 2018-01-25 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) kernel-3.10.0-693.17.1.el7, kernel-abi-whitelists-3.10.0-693.17.1.el7, kernel-debug-3.10.0-693.17.1.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-693.17.1.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) kernel-3.10.0-693.17.1.el7, kernel-abi-whitelists-3.10.0-693.17.1.el7, kernel-debug-3.10.0-693.17.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-693.17.1.el7
    • Red Hat Enterprise Linux Server (v. 7) kernel-3.10.0-693.17.1.el7, kernel-abi-whitelists-3.10.0-693.17.1.el7, kernel-bootwrapper-3.10.0-693.17.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-693.17.1.el7, kernel-tools-libs-devel-3.10.0-693.17.1.el7
    • Red Hat Enterprise Linux Workstation (v. 7) kernel-3.10.0-693.17.1.el7, kernel-abi-whitelists-3.10.0-693.17.1.el7, kernel-debug-3.10.0-693.17.1.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-693.17.1.el7

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:0151
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:0151
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:0151
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:0151
Red Hat Enterprise Linux Realtime (v. 7)Fixed RHSA-2018:0152
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:0151
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:0151
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:0151
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:0151
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2018:0152
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2018:0181
Not affected: 3 products
  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-8539
  2. 2026-10-03 Alias added: GHSA-6m9m-6qjp-9mm8

References

Patch 2

Advisory 22

Sources

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