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TI-2018-05586 Aliases CVE-2018-7740GHSA-cgrc-gg26-w6wg

The resv_map_release function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows…

Priority LOW 26CWE-119Published · 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
Partial Red Hat: 12 fixed, 2 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

The resv_map_release function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remap_file_pages system call.

Why it matters now

EPSS 0.00583 48th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 12 fixed, 2 without a fix

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 · 10

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*up to 4.15.7VulnerableLinux
cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
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_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 4.15.7 Vulnerable ·Linux
  • cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • 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_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • 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-2018:3083 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: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Enterprise MRG 2AffectedNo fix planned: Will not 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 Optional (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3083
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3083
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-2018:3083
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed 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
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-2018-7740
  2. 2026-10-03 Alias added: GHSA-cgrc-gg26-w6wg

References

Exploit 1

Advisory 7

Sources

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