CVE-2019-10140 — kernel: overlayfs: NULL pointer dereference in ovl_posix_acl_create function in fs/overlayfs/dir.c

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MEDIUM

kernel: overlayfs: NULL pointer dereference in ovl_posix_acl_create function in fs/overlayfs/dir.c

Published Aug 15, 2019

5.5

MEDIUM

CVSS 3.0

EPSS 0.32%

Description

A vulnerability was found in Linux kernel's, versions up to 3.10, implementation of overlayfs. An attacker with local access can create a denial of service situation via NULL pointer dereference in ovl_posix_acl_create function in fs/overlayfs/dir.c. This can allow attackers with ability to create directories on overlayfs to crash the kernel creating a denial of service (DOS).

Affected products

Vendor OpenSource Product Kernel: Default
n/a
- Version
  up to kernel-3.10
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

OpenSource

Kernel:

n/a

Version	Status	Constraints
up to kernel-3.10	affected	-

Red Hat Enterprise Linux 7

kernel-0:3.10.0-1062.el7

Fixed · RHSA-2019:2029
Red Hat Enterprise Linux 7

kernel-rt-0:3.10.0-1062.rt56.1022.el7

Fixed · RHSA-2019:2043
Red Hat Enterprise Linux 5

kernel

Not affected
Red Hat Enterprise Linux 6

kernel

Not affected
Red Hat Enterprise Linux 7

kernel-alt

Will not fix
Red Hat Enterprise Linux 8

kernel

Not affected
Red Hat Enterprise Linux 8

kernel-rt

Not affected
Red Hat Enterprise MRG 2

kernel-rt

Not affected

Product	Package	State	Advisory
Red Hat Enterprise Linux 7	kernel-0:3.10.0-1062.el7	Fixed	RHSA-2019:2029
Red Hat Enterprise Linux 7	kernel-rt-0:3.10.0-1062.rt56.1022.el7	Fixed	RHSA-2019:2043
Red Hat Enterprise Linux 5	kernel	Not affected	n/a
Red Hat Enterprise Linux 6	kernel	Not affected	n/a
Red Hat Enterprise Linux 7	kernel-alt	Will not fix	n/a
Red Hat Enterprise Linux 8	kernel	Not affected	n/a
Red Hat Enterprise Linux 8	kernel-rt	Not affected	n/a
Red Hat Enterprise MRG 2	kernel-rt	Not affected	n/a

Remediation

Red Hat mitigation

Some systems may wish to use device-mapper as an alternative to overlayfs. This does not remove the flaw if overlayfs module is still in use.

Metrics

0.32% 0.00320

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00320

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (8 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.32% (0.00320)	22.65th	v5 (v2026.06.15)
Sep 20, 2026	0.32% (0.00320)	25.21th	v5 (v2026.06.15)
Jul 20, 2024	0.04% (0.00042)	5.06th	v3 (v2023.03.01)
Mar 7, 2023	0.04% (0.00042)	5.63th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Jan 6, 2022	1.83% (0.01832)	34.72th	v1
Jan 5, 2022	0.41% (0.00414)	8.38th	v5 (v2026.06.15)
Apr 14, 2021	0.41% (0.00414)	0.00th	v1

Weaknesses (1)

CWE-476

NULL Pointer Dereference

References (6)

https://access.redhat.com/security/cve/CVE-2019-10140
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1677778
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10140
x_refsource_CONFIRMIssue TrackingThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2019-10140
https://security.netapp.com/advisory/ntap-20190905-0002/
x_refsource_CONFIRM
https://www.cve.org/CVERecord?id=CVE-2019-10140

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2019-10140		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1677778		Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10140		x_refsource_CONFIRMIssue TrackingThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2019-10140
https://security.netapp.com/advisory/ntap-20190905-0002/		x_refsource_CONFIRM
https://www.cve.org/CVERecord?id=CVE-2019-10140