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Fencer Vulns
high 7.0

CVE-2019-3896 json

A double-free can happen in idr_remove_all() in lib/idr.c in the Linux kernel 2.6 branch.

published 2019-06-18 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-13504

cvss
7.0
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

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).

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.2.41-1

debian advisories DEBIAN-CVE-2019-3896

  • kernel RHEL 6 2.6.32-754.15.3.el6
  • perf RHEL 6 2.6.32-754.15.3.el6
  • python-perf RHEL 6 2.6.32-754.15.3.el6
  • kernel-kdump RHEL 6 2.6.32-754.15.3.el6
  • kernel-firmware RHEL 6 2.6.32-754.15.3.el6
  • kernel-bootwrapper RHEL 6 2.6.32-754.15.3.el6
  • kernel-abi-whitelists RHEL 6 2.6.32-754.15.3.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-754.15.3.el6

red hat advisories RHSA-2019:1488RHSA-2019:1489RHSA-2019:1490

  • kernel-ec2 SLES 11 SP4-LTSS 3.0.101-108.98.1
  • kernel-pae SLES 11 SP4-LTSS 3.0.101-108.98.1
  • kernel-xen SLES 11 SP4-LTSS 3.0.101-108.98.1
  • kernel-syms SLES 11 SP4-LTSS 3.0.101-108.98.1
  • kernel-ppc64 SLES 11 SP4-LTSS 3.0.101-108.98.1
  • kernel-trace SLES 11 SP4-LTSS 3.0.101-108.98.1
  • kernel-bigmem SLES 11 SP4-LTSS 3.0.101-108.98.1
  • kernel-source SLES 11 SP4-LTSS 3.0.101-108.98.1

suse advisories SUSE-SU-2019:14127-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-3896 updated cvss 7.0

kernel: Double free in lib/idr.c

  • Red Hat Enterprise Linux 5 kernel
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-754.15.3.el6, kernel 2.6.32-754.15.3.el6, kernel-firmware 2.6.32-754.15.3.el6, kernel-abi-whitelists 2.6.32-754.15.3.el6, kernel-debuginfo-common-i686 2.6.32-754.15.3.el6, kernel-debuginfo-common-x86_64 2.6.32-754.15.3.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-754.15.3.el6, kernel-debuginfo-common-i686 2.6.32-754.15.3.el6, kernel-debuginfo-common-x86_64 2.6.32-754.15.3.el6 Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-754.15.3.el6, kernel 2.6.32-754.15.3.el6, kernel-firmware 2.6.32-754.15.3.el6, kernel-abi-whitelists 2.6.32-754.15.3.el6, kernel-debuginfo-common-i686 2.6.32-754.15.3.el6, kernel-debuginfo-common-x86_64 2.6.32-754.15.3.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-754.15.3.el6, kernel-debuginfo-common-x86_64 2.6.32-754.15.3.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-754.15.3.el6, kernel 2.6.32-754.15.3.el6, kernel-kdump 2.6.32-754.15.3.el6, kernel-firmware 2.6.32-754.15.3.el6, kernel-bootwrapper 2.6.32-754.15.3.el6, kernel-abi-whitelists 2.6.32-754.15.3.el6, +4 more
    fixed: vendor fix RHSA-2019:1488
  • Red Hat Enterprise Linux Server AUS (v. 6.5) perf 2.6.32-431.95.3.el6, kernel 2.6.32-431.95.3.el6, kernel-firmware 2.6.32-431.95.3.el6, kernel-abi-whitelists 2.6.32-431.95.3.el6, kernel-debuginfo-common-x86_64 2.6.32-431.95.3.el6
    fixed: vendor fix RHSA-2019:1490
  • Red Hat Enterprise Linux Server AUS (v. 6.6) perf 2.6.32-504.79.3.el6, kernel 2.6.32-504.79.3.el6, kernel-firmware 2.6.32-504.79.3.el6, kernel-abi-whitelists 2.6.32-504.79.3.el6, kernel-debuginfo-common-x86_64 2.6.32-504.79.3.el6
    fixed: vendor fix RHSA-2019:1489
  • Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-754.15.3.el6, kernel-debuginfo-common-i686 2.6.32-754.15.3.el6, kernel-debuginfo-common-ppc64 2.6.32-754.15.3.el6, kernel-debuginfo-common-s390x 2.6.32-754.15.3.el6, kernel-debuginfo-common-x86_64 2.6.32-754.15.3.el6
    fixed: vendor fix RHSA-2019:1488
  • 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, kernel-debuginfo-common-x86_64 2.6.32-431.95.3.el6
    fixed: vendor fix RHSA-2019:1490
  • Red Hat Enterprise Linux Server Optional AUS (v. 6.6) python-perf 2.6.32-504.79.3.el6, kernel-debuginfo-common-x86_64 2.6.32-504.79.3.el6
    fixed: vendor fix RHSA-2019:1489
  • Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-754.15.3.el6, kernel 2.6.32-754.15.3.el6, kernel-firmware 2.6.32-754.15.3.el6, kernel-abi-whitelists 2.6.32-754.15.3.el6, kernel-debuginfo-common-i686 2.6.32-754.15.3.el6, kernel-debuginfo-common-x86_64 2.6.32-754.15.3.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-754.15.3.el6, kernel-debuginfo-common-i686 2.6.32-754.15.3.el6, kernel-debuginfo-common-x86_64 2.6.32-754.15.3.el6
    fixed: vendor fix RHSA-2019:1488
show 1 more
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.0 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • The Linux Foundation kernel

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.