Read the docs
TI-2018-10498 Aliases CVE-2018-14633GHSA-88p5-45fx-5x87

Stack-based buffer overflow in backstage kernel

Priority MEDIUM 42CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Low · Low · High
Fix status
Partial Red Hat: 14 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. Kernel versions 4.18.x, 4.14.x and 3.10.x are believed to be vulnerable.

Why it matters now

EPSS 0.08743 95th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 14 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
backstagekernel4.18.x, 4.14.x, 3.10.x—No fix listedCNA
  • kernel Vendorbackstage Affected 4.18.x, 4.14.x, 3.10.x Fixed in — No fix listed CNA

CPE configurations NVD · 15

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.1 to before 3.16.59; 3.17 to before 3.18.124; 3.19 to before 4.4.159; 4.5 to before 4.9.130; 4.10 to before 4.14.73; 4.15 to before 4.18.11VulnerableLinux
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:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
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_eus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.1 to before 3.16.59; 3.17 to before 3.18.124; 3.19 to before 4.4.159; 4.5 to before 4.9.130; 4.10 to before 4.14.73; 4.15 to before 4.18.11 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:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • 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_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Show 5 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed 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_aus:7.6:*:*:*:*:*:*:* Versions 7.6 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_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 3 advisories

  • RHSA-2019:1946 Released 2019-07-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) kernel-3.10.0-693.55.1.el7, kernel-abi-whitelists-3.10.0-693.55.1.el7, kernel-debug-3.10.0-693.55.1.el7 +8
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.55.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.4) kernel-3.10.0-693.55.1.el7, kernel-abi-whitelists-3.10.0-693.55.1.el7, kernel-bootwrapper-3.10.0-693.55.1.el7 +11
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.4) kernel-debug-devel-3.10.0-693.55.1.el7, kernel-tools-libs-devel-3.10.0-693.55.1.el7
  • RHSA-2018:3651 Released 2018-11-27 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-957.1.3.el7, kernel-3.10.0-957.1.3.el7, kernel-abi-whitelists-3.10.0-957.1.3.el7 +9
    • Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.1.3.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-957.1.3.el7, kernel-3.10.0-957.1.3.el7, kernel-abi-whitelists-3.10.0-957.1.3.el7 +9
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.1.3.el7
    • Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-957.1.3.el7, kernel-3.10.0-957.1.3.el7, kernel-abi-whitelists-3.10.0-957.1.3.el7 +12
    • Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-957.1.3.el7, kernel-tools-libs-devel-3.10.0-957.1.3.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-957.1.3.el7, kernel-3.10.0-957.1.3.el7, kernel-abi-whitelists-3.10.0-957.1.3.el7 +9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-957.1.3.el7
  • RHSA-2018:3666 Released 2018-11-27 · Red Hat rating Moderate
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Realtime (v. 7) kernel-rt-3.10.0-957.1.3.rt56.913.el7, kernel-rt-debug-3.10.0-957.1.3.rt56.913.el7, kernel-rt-debug-devel-3.10.0-957.1.3.rt56.913.el7 +4
    • Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-957.1.3.rt56.913.el7, kernel-rt-debug-3.10.0-957.1.3.rt56.913.el7, kernel-rt-debug-devel-3.10.0-957.1.3.rt56.913.el7 +7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    The Linux Foundation kernel — USN-3779-1

    2 records Highest priority Priority CRITICAL 1 CRITICAL, 1 MEDIUM

    Other records, highest priority first

    • TI-2018-10499 Integer overflow in backstage kernelPriority CRITICAL 93
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. 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 yet
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:3651
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3651
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:3651
Red Hat Enterprise Linux ComputeNode EUS (v. 7.4)Fixed RHSA-2019:1946
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:3651
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4)Fixed RHSA-2019:1946
Red Hat Enterprise Linux Realtime (v. 7)Fixed RHSA-2018:3666
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3651
Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2019:1946
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3651
Red Hat Enterprise Linux Server Optional EUS (v. 7.4)Fixed RHSA-2019:1946
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3651
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3651
Red Hat Enterprise Linux for Real Time for NFV (v. 7)Fixed RHSA-2018:3666
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-14633
  2. 2026-10-03 Alias added: GHSA-88p5-45fx-5x87

References

Patch 3

Advisory 14

  • TI-2026-33119 Malware in 42 @tanstack/* packages exfiltrates cloud credentials, GitHub tokens, and SSH keys KEVCVSS 3.1CRITICAL 9.6
  • TI-2018-10499 Integer overflow in backstage kernel KEVCVSS 3.0HIGH 7.8
  • TI-2024-08998 Remote Code Execution in kedro-org/kedro CVSS 3.0CRITICAL 9.8
  • TI-2023-12294 Dragonfly2 vulnerable to hard coded cyptographic key CVSS 3.1CRITICAL 9.8
  • TI-2021-12074 Authentication vulnerability in MOSN v.0.23.0 allows attacker to escalate privileges via… CVSS 3.1CRITICAL 9.8
  • TI-2019-04061 runc through 1.0-rc6, as used in Docker before 18.09.2 and other products, allows… CVSS 3.1HIGH 8.6
See all 662 →

Sources

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