Read the docs
TI-2019-02905 Aliases CVE-2019-3896GHSA-2p8m-h2q6-92v8

Use after free in backstage kernel

Priority LOW 34CWE-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
Partial Red Hat: 12 fixed, 1 without a fix

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

Summary

A double-free can happen in idr_remove_all() in lib/idr.c in the Linux kernel 2.6 branch. An unprivileged local attacker can use this flaw for a privilege escalation or for a system crash and a denial of service (DoS).

Why it matters now

EPSS 0.00417 36th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 12 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
backstagekernel2.6.32—No fix listedCNA
  • kernel Vendorbackstage Affected 2.6.32 Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*2.6.0 – 2.6.39.4VulnerableLinux
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*6.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:*:*:*:*:*:*:*6.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.0 – 2.6.39.4 Vulnerable ·Linux
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:* Versions 6.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:*:*:*:*:*:*:* Versions 6.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat

Remediation

Red Hat 3 advisories

  • RHSA-2019:1490 Released 2019-06-17 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 6.5) kernel-2.6.32-431.95.3.el6, kernel-abi-whitelists-2.6.32-431.95.3.el6, kernel-debug-2.6.32-431.95.3.el6 +5
    • Red Hat Enterprise Linux Server Optional AUS (v. 6.5) kernel-2.6.32-431.95.3.el6, python-perf-2.6.32-431.95.3.el6
  • RHSA-2019:1489 Released 2019-06-17 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server AUS (v. 6.6) kernel-2.6.32-504.79.3.el6, kernel-abi-whitelists-2.6.32-504.79.3.el6, kernel-debug-2.6.32-504.79.3.el6 +5
    • Red Hat Enterprise Linux Server Optional AUS (v. 6.6) python-perf-2.6.32-504.79.3.el6
  • RHSA-2019:1488 Released 2019-06-17 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-754.15.3.el6, kernel-abi-whitelists-2.6.32-754.15.3.el6, kernel-debug-2.6.32-754.15.3.el6 +5
    • Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf-2.6.32-754.15.3.el6
    • Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-754.15.3.el6, kernel-abi-whitelists-2.6.32-754.15.3.el6, kernel-debug-2.6.32-754.15.3.el6 +5
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf-2.6.32-754.15.3.el6
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-754.15.3.el6, kernel-abi-whitelists-2.6.32-754.15.3.el6, kernel-bootwrapper-2.6.32-754.15.3.el6 +8
    • Red Hat Enterprise Linux Server Optional (v. 6) python-perf-2.6.32-754.15.3.el6
    • Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-754.15.3.el6, kernel-abi-whitelists-2.6.32-754.15.3.el6, kernel-debug-2.6.32-754.15.3.el6 +5
    • Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf-2.6.32-754.15.3.el6

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2019:1488
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2019:1488
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2019:1488
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2019:1488
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2019:1488
Red Hat Enterprise Linux Server AUS (v. 6.5)Fixed RHSA-2019:1490
Red Hat Enterprise Linux Server AUS (v. 6.6)Fixed RHSA-2019:1489
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2019:1488
Red Hat Enterprise Linux Server Optional AUS (v. 6.5)Fixed RHSA-2019:1490
Red Hat Enterprise Linux Server Optional AUS (v. 6.6)Fixed RHSA-2019:1489
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2019:1488
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2019:1488
Not affected: 3 products
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise MRG 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-3896
  2. 2026-10-03 Alias added: GHSA-2p8m-h2q6-92v8

References

Advisory 1

Other 2

  • 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