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TI-2017-13519 Aliases CVE-2017-18344GHSA-j9fr-8f9m-c9qc

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel…

Priority LOW 31CWE-125Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).

Why it matters now

EPSS 0.03443 89th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed Red Hat: 8 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 · 15

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 4.14.8VulnerableLinux
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*12.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:a:redhat:mrg_realtime:2.0:*:*:*:*:*:*:*2.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*7.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.14.8 Vulnerable ·Linux
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Versions 12.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:a:redhat:mrg_realtime:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
Show 5 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:*7.2VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*7.3VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 8 advisories

  • RHSA-2018:3591 Released 2018-11-13 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.3) kernel-3.10.0-514.61.1.el7, kernel-abi-whitelists-3.10.0-514.61.1.el7, kernel-debug-3.10.0-514.61.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.61.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.3) kernel-3.10.0-514.61.1.el7, kernel-abi-whitelists-3.10.0-514.61.1.el7, kernel-bootwrapper-3.10.0-514.61.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.3) kernel-debug-devel-3.10.0-514.61.1.el7, kernel-tools-libs-devel-3.10.0-514.61.1.el7
  • RHSA-2018:3590 Released 2018-11-13 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 7.2) kernel-3.10.0-327.76.1.el7, kernel-abi-whitelists-3.10.0-327.76.1.el7, kernel-debug-3.10.0-327.76.1.el7 +8
    • Red Hat Enterprise Linux Server E4S (v. 7.2) kernel-3.10.0-327.76.1.el7, kernel-abi-whitelists-3.10.0-327.76.1.el7, kernel-debug-3.10.0-327.76.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) kernel-tools-libs-devel-3.10.0-327.76.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.2) kernel-tools-libs-devel-3.10.0-327.76.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.2) kernel-tools-libs-devel-3.10.0-327.76.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.2) kernel-3.10.0-327.76.1.el7, kernel-abi-whitelists-3.10.0-327.76.1.el7, kernel-debug-3.10.0-327.76.1.el7 +8
  • RHSA-2018:3540 Released 2018-11-13 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) kernel-3.10.0-693.43.1.el7, kernel-abi-whitelists-3.10.0-693.43.1.el7, kernel-debug-3.10.0-693.43.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.43.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.4) kernel-3.10.0-693.43.1.el7, kernel-abi-whitelists-3.10.0-693.43.1.el7, kernel-bootwrapper-3.10.0-693.43.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.4) kernel-debug-devel-3.10.0-693.43.1.el7, kernel-tools-libs-devel-3.10.0-693.43.1.el7
Show 5 more Red Hat advisories
  • RHSA-2018:3586 Released 2018-11-13 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-1:3.10.0-693.43.1.rt56.630.el6rt, kernel-rt-debug-1:3.10.0-693.43.1.rt56.630.el6rt, kernel-rt-debug-devel-1:3.10.0-693.43.1.rt56.630.el6rt +7
  • RHSA-2018:3459 Released 2018-11-06 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) kernel-3.10.0-862.20.2.el7, kernel-abi-whitelists-3.10.0-862.20.2.el7, kernel-debug-3.10.0-862.20.2.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) kernel-tools-libs-devel-3.10.0-862.20.2.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.5) kernel-3.10.0-862.20.2.el7, kernel-abi-whitelists-3.10.0-862.20.2.el7, kernel-bootwrapper-3.10.0-862.20.2.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.5) kernel-debug-devel-3.10.0-862.20.2.el7, kernel-tools-libs-devel-3.10.0-862.20.2.el7
  • RHSA-2018:3096 Released 2018-10-30 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-957.rt56.910.el7, kernel-rt-debug-3.10.0-957.rt56.910.el7, kernel-rt-debug-devel-3.10.0-957.rt56.910.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-957.rt56.910.el7, kernel-rt-debug-3.10.0-957.rt56.910.el7, kernel-rt-debug-devel-3.10.0-957.rt56.910.el7 +7
  • RHSA-2018:2948 Released 2018-10-30 · Red Hat rating Important
    kernel-alt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-4.14.0-115.el7a, kernel-abi-whitelists-4.14.0-115.el7a, kernel-alt-4.14.0-115.el7a +9
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debug-devel-4.14.0-115.el7a, kernel-tools-libs-devel-4.14.0-115.el7a
  • RHSA-2018:3083 Released 2018-10-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-957.el7, kernel-3.10.0-957.el7, kernel-abi-whitelists-3.10.0-957.el7 +8
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-957.el7, kernel-3.10.0-957.el7, kernel-abi-whitelists-3.10.0-957.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-957.el7, kernel-3.10.0-957.el7, kernel-abi-whitelists-3.10.0-957.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-957.el7, kernel-tools-libs-devel-3.10.0-957.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-957.el7, kernel-3.10.0-957.el7, kernel-abi-whitelists-3.10.0-957.el7 +8
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.el7
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-3.10.0-957.el7, kernel-abi-whitelists-3.10.0-957.el7, kernel-bootwrapper-3.10.0-957.el7 +10
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debug-devel-3.10.0-957.el7, kernel-tools-libs-devel-3.10.0-957.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-2018:3083
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux ComputeNode EUS (v. 7.3)Fixed RHSA-2018:3591
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4)Fixed RHSA-2018:3540
Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)Fixed RHSA-2018:3459
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3)Fixed RHSA-2018:3591
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4)Fixed RHSA-2018:3540
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5)Fixed RHSA-2018:3459
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux Server AUS (v. 7.2)Fixed RHSA-2018:3590
Red Hat Enterprise Linux Server E4S (v. 7.2)Fixed RHSA-2018:3590
Red Hat Enterprise Linux Server EUS (v. 7.3)Fixed RHSA-2018:3591
Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2018:3540
Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2018:3459
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux Server Optional AUS (v. 7.2)Fixed RHSA-2018:3590
Red Hat Enterprise Linux Server Optional E4S (v. 7.2)Fixed RHSA-2018:3590
Red Hat Enterprise Linux Server Optional EUS (v. 7.3)Fixed RHSA-2018:3591
Red Hat Enterprise Linux Server Optional EUS (v. 7.4)Fixed RHSA-2018:3540
Red Hat Enterprise Linux Server Optional EUS (v. 7.5)Fixed RHSA-2018:3459
Red Hat Enterprise Linux Server Optional TUS (v. 7.2)Fixed RHSA-2018:3590
Red Hat Enterprise Linux Server TUS (v. 7.2)Fixed RHSA-2018:3590
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:2948, RHSA-2018:3083
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:2948, RHSA-2018:3083
Red Hat Enterprise Linux for Real Time (v. 7)Fixed RHSA-2018:3096
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2018:3096
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2018:3586
Not affected: 8 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux Client (v. 7)
  • Red Hat Enterprise Linux ComputeNode (v. 7)
  • Red Hat Enterprise Linux Server (v. 7)
  • Red Hat Enterprise Linux Workstation (v. 7)
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-18344
  2. 2026-10-03 Alias added: GHSA-j9fr-8f9m-c9qc

References

Exploit 1

Patch 1

Advisory 11

Sources

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