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NVD / CVE Program· CNA redhat

CVE-2020-10757: A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages.

Noroxi assessment

Priority: Monitor (action score 31/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.99% (FIRST EPSS); higher than 62.5% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: linux (Debian:10) 4.19.118-2+deb10u1; linux (Debian:12) 5.6.14-2; linux-4.9 (Debian:8) 4.9.210-1+deb9u1~deb8u1.
  • Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to linux (Debian:10) 4.19.118-2+deb10u1; linux (Debian:12) 5.6.14-2; linux-4.9 (Debian:8) 4.9.210-1+deb9u1~deb8u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system.

HighCVSS 7.8 · v3.1—Proof of concept Fix available
Published
Jun 9, 2020
Updated
Jun 16, 2026
EPSS
0.9% · 62th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.9%

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  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
opensuseleap
redhatenterprise linux
redhatenterprise mrg
fedoraprojectfedora
debiandebian linux
canonicalubuntu linux
netappactive iq unified manager
netappcloud backup
netappsteelstore cloud integrated storage

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux16.04
  • canonical ubuntu linux18.04
  • canonical ubuntu linux20.04
  • debian debian linux8.0
  • fedoraproject fedora31
  • linux linux kernel5.7 and later · before 5.7.1
  • linux linux kernel4.5 and later · before 4.9.227
  • linux linux kernel4.15 and later · before 4.19.127
  • linux linux kernel4.20 and later · before 5.4.45
  • linux linux kernel5.5 and later · before 5.6.17
  • linux linux kernel4.10 and later · before 4.14.184
  • netapp active iq unified managerall versions
  • netapp cloud backupall versions
  • netapp steelstore cloud integrated storageall versions
  • opensuse leap15.1
  • redhat enterprise linux7.0
  • redhat enterprise linux8.0
  • redhat enterprise mrg2.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a Kernel

    • All versions after 4.5-rc1.affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10linuxbefore 4.19.118-2+deb10u14.19.118-2+deb10u1
Debian:12linuxbefore 5.6.14-25.6.14-2
Debian:8linux-4.9before 4.9.210-1+deb9u1~deb8u14.9.210-1+deb9u1~deb8u1
Debian:9linuxbefore 4.9.210-1+deb9u14.9.210-1+deb9u1
openSUSE:Leap 15.1kernel-debugbefore 4.12.14-lp151.28.52.14.12.14-lp151.28.52.1
openSUSE:Leap 15.1kernel-defaultbefore 4.12.14-lp151.28.52.14.12.14-lp151.28.52.1
openSUSE:Leap 15.1kernel-docsbefore 4.12.14-lp151.28.52.24.12.14-lp151.28.52.2
openSUSE:Leap 15.1kernel-kvmsmallbefore 4.12.14-lp151.28.52.14.12.14-lp151.28.52.1
openSUSE:Leap 15.1kernel-obs-buildbefore 4.12.14-lp151.28.52.34.12.14-lp151.28.52.3
openSUSE:Leap 15.1kernel-obs-qabefore 4.12.14-lp151.28.52.34.12.14-lp151.28.52.3
openSUSE:Leap 15.1kernel-sourcebefore 4.12.14-lp151.28.52.14.12.14-lp151.28.52.1
openSUSE:Leap 15.1kernel-symsbefore 4.12.14-lp151.28.52.14.12.14-lp151.28.52.1
openSUSE:Leap 15.1kernel-vanillabefore 4.12.14-lp151.28.52.14.12.14-lp151.28.52.1
openSUSE:Leap 15.2kernel-rtbefore 5.3.18-lp152.3.5.15.3.18-lp152.3.5.1
openSUSE:Leap 15.2kernel-rt_debugbefore 5.3.18-lp152.3.5.15.3.18-lp152.3.5.1
openSUSE:Leap 15.2kernel-source-rtbefore 5.3.18-lp152.3.5.15.3.18-lp152.3.5.1
openSUSE:Leap 15.2kernel-syms-rtbefore 5.3.18-lp152.3.5.15.3.18-lp152.3.5.1
Red Hat:enterprise_linux:7::clientbpftoolbefore 0:3.10.0-1127.18.2.el70:3.10.0-1127.18.2.el7
Red Hat:enterprise_linux:7::clientbpftool-debuginfobefore 0:3.10.0-1127.18.2.el70:3.10.0-1127.18.2.el7
Red Hat:enterprise_linux:7::clientkernelbefore 0:3.10.0-1127.18.2.el70:3.10.0-1127.18.2.el7
Red Hat:enterprise_linux:7::clientkernel-abi-whitelistsbefore 0:3.10.0-1127.18.2.el70:3.10.0-1127.18.2.el7
Red Hat:enterprise_linux:7::clientkernel-debugbefore 0:3.10.0-1127.18.2.el70:3.10.0-1127.18.2.el7
Red Hat:enterprise_linux:7::clientkernel-debug-debuginfobefore 0:3.10.0-1127.18.2.el70:3.10.0-1127.18.2.el7
Red Hat:enterprise_linux:7::clientkernel-debug-develbefore 0:3.10.0-1127.18.2.el70:3.10.0-1127.18.2.el7

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2019-20812Jun 2, 2020 · An issue was discovered in the Linux kernel before 5.4.7.
    22Monitor
  • ← EarlierCVE-2020-13974Jun 9, 2020 · An issue was discovered in the Linux kernel 4.4 through 5.7.1.
    31Monitor
  • Later →CVE-2020-10732Jun 12, 2020 · A flaw was found in the Linux kernel's implementation of Userspace core dumps.
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:linux5.6.14-2 · Debian:12Package registry (OSV)
debian:linux-4.94.9.210-1+deb9u1~deb8u1 · Debian:8Package registry (OSV)
opensuse:kernel-debug4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-default4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-docs4.12.14-lp151.28.52.2 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-kvmsmall4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-obs-build4.12.14-lp151.28.52.3 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-obs-qa4.12.14-lp151.28.52.3 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-rt5.3.18-lp152.3.5.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-rt_debug5.3.18-lp152.3.5.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-source4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-source-rt5.3.18-lp152.3.5.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-syms4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-vanilla4.12.14-lp151.28.52.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:bpftool0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-whitelists0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debuginfo0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
suse:kernel-azure4.12.14-16.16.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:kernel-default4.4.180-94.121.1 · SUSE:HPE Helion OpenStack 8Package registry (OSV)
suse:kernel-docs4.12.14-197.45.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP1Package registry (OSV)
suse:kernel-livepatch-SLE15-SP1_Update_121-3.5.1 · SUSE:Linux Enterprise Live Patching 15 SP1Package registry (OSV)

+8

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02022-03-30

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+659 d
  3. TodayNov 3, 2026+2339 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (11 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records