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TI-2018-14938 Aliases CVE-2018-20976GHSA-2px5-xhf9-x464

An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel before 4.18.

Priority LOW 35CWE-416Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel before 4.18. A use after free exists, related to xfs_fs_fill_super failure.

Why it matters now

EPSS 0.00632 50th percentileScored 2026-11-07
Fix Fixed Red Hat: 5 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 · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 4.18VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.18 Vulnerable ·Linux

Remediation

Red Hat 5 advisories

  • RHSA-2020:0661 Released 2020-03-03 · Red Hat rating Important
    kernel security and enhancement update
    • Red Hat Enterprise Linux Server AUS (v. 7.2) kernel-3.10.0-327.85.1.el7, kernel-abi-whitelists-3.10.0-327.85.1.el7, kernel-debug-3.10.0-327.85.1.el7 +7
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) kernel-tools-libs-devel-3.10.0-327.85.1.el7
  • RHSA-2020:0609 Released 2020-02-26 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-1:3.10.0-693.64.1.rt56.662.el6rt, kernel-rt-debug-1:3.10.0-693.64.1.rt56.662.el6rt, kernel-rt-debug-devel-1:3.10.0-693.64.1.rt56.662.el6rt +7
  • RHSA-2020:0592 Released 2020-02-25 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) kernel-3.10.0-693.64.1.el7, kernel-abi-whitelists-3.10.0-693.64.1.el7, kernel-debug-3.10.0-693.64.1.el7 +7
    • Red Hat Enterprise Linux Server E4S (v. 7.4) kernel-3.10.0-693.64.1.el7, kernel-abi-whitelists-3.10.0-693.64.1.el7, kernel-bootwrapper-3.10.0-693.64.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.64.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.4) kernel-debug-devel-3.10.0-693.64.1.el7, kernel-tools-libs-devel-3.10.0-693.64.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) kernel-tools-libs-devel-3.10.0-693.64.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.4) kernel-3.10.0-693.64.1.el7, kernel-abi-whitelists-3.10.0-693.64.1.el7, kernel-debug-3.10.0-693.64.1.el7 +7
Show 2 more Red Hat advisories
  • RHSA-2020:0543 Released 2020-02-19 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) kernel-3.10.0-862.48.1.el7, kernel-abi-whitelists-3.10.0-862.48.1.el7, kernel-debug-3.10.0-862.48.1.el7 +7
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) kernel-tools-libs-devel-3.10.0-862.48.1.el7
    • Red Hat Enterprise Linux Server EUS (v. 7.5) kernel-3.10.0-862.48.1.el7, kernel-abi-whitelists-3.10.0-862.48.1.el7, kernel-bootwrapper-3.10.0-862.48.1.el7 +10
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.5) kernel-debug-devel-3.10.0-862.48.1.el7, kernel-tools-libs-devel-3.10.0-862.48.1.el7
  • RHSA-2020:0178 Released 2020-01-21 · Red Hat rating Important
    kernel security and enhancement update
    • Red Hat Enterprise Linux Server AUS (v. 7.3) kernel-3.10.0-514.72.1.el7, kernel-abi-whitelists-3.10.0-514.72.1.el7, kernel-debug-3.10.0-514.72.1.el7 +8
    • Red Hat Enterprise Linux Server E4S (v. 7.3) kernel-3.10.0-514.72.1.el7, kernel-abi-whitelists-3.10.0-514.72.1.el7, kernel-bootwrapper-3.10.0-514.72.1.el7 +9
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.72.1.el7
    • Red Hat Enterprise Linux Server Optional E4S (v. 7.3) kernel-debug-devel-3.10.0-514.72.1.el7, kernel-tools-libs-devel-3.10.0-514.72.1.el7
    • Red Hat Enterprise Linux Server Optional TUS (v. 7.3) kernel-tools-libs-devel-3.10.0-514.72.1.el7
    • Red Hat Enterprise Linux Server TUS (v. 7.3) kernel-3.10.0-514.72.1.el7, kernel-abi-whitelists-3.10.0-514.72.1.el7, kernel-debug-3.10.0-514.72.1.el7 +8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)Fixed RHSA-2020:0543
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5)Fixed RHSA-2020:0543
Red Hat Enterprise Linux Server AUS (v. 7.2)Fixed RHSA-2020:0661
Red Hat Enterprise Linux Server AUS (v. 7.3)Fixed RHSA-2020:0178
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2020:0592
Red Hat Enterprise Linux Server E4S (v. 7.3)Fixed RHSA-2020:0178
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2020:0592
Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2020:0543
Red Hat Enterprise Linux Server Optional AUS (v. 7.2)Fixed RHSA-2020:0661
Red Hat Enterprise Linux Server Optional AUS (v. 7.3)Fixed RHSA-2020:0178
Red Hat Enterprise Linux Server Optional AUS (v. 7.4)Fixed RHSA-2020:0592
Red Hat Enterprise Linux Server Optional E4S (v. 7.3)Fixed RHSA-2020:0178
Red Hat Enterprise Linux Server Optional E4S (v. 7.4)Fixed RHSA-2020:0592
Red Hat Enterprise Linux Server Optional EUS (v. 7.5)Fixed RHSA-2020:0543
Red Hat Enterprise Linux Server Optional TUS (v. 7.3)Fixed RHSA-2020:0178
Red Hat Enterprise Linux Server Optional TUS (v. 7.4)Fixed RHSA-2020:0592
Red Hat Enterprise Linux Server TUS (v. 7.3)Fixed RHSA-2020:0178
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2020:0592
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2020:0609
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-20976
  2. 2026-10-03 Alias added: GHSA-2px5-xhf9-x464
  3. 2026-10-27 EPSS moved to the 50th–90th percentile

References

Patch 1

Advisory 9

Other 7

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

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