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NVD / CVE Program· CNA redhat

CVE-2020-25645: A flaw was found in the Linux kernel in versions before 5.9-rc7.

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.4% (FIRST EPSS); higher than 84.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: linux (Debian:10) 4.19.152-1; linux (Debian:12) 5.8.14-1; linux (Debian:9) 4.9.246-1.
  • Mentioned 4 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to linux (Debian:10) 4.19.152-1; linux (Debian:12) 5.8.14-1; linux (Debian:9) 4.9.246-1 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 before 5.9-rc7. Traffic between two Geneve endpoints may be unencrypted when IPsec is configured to encrypt traffic for the specific UDP port used by the GENEVE tunnel allowing anyone between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Oct 13, 2020
Updated
Jun 16, 2026
EPSS
2.4% · 84th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.4%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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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
debiandebian linux
netappsolidfire \& hci management node
netappsolidfire \& hci storage node
opensuseleap
netapphci compute node bios
netapphci compute node
canonicalubuntu linux

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Affected versions

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

  • canonical ubuntu linux14.04
  • canonical ubuntu linux16.04
  • canonical ubuntu linux18.04
  • canonical ubuntu linux20.04
  • debian debian linux10.0
  • debian debian linux9.0
  • linux linux kernelbefore 5.9.0
  • linux linux kernel5.9.0
  • netapp hci compute node biosall versions
  • netapp solidfire & hci management nodeall versions
  • netapp solidfire & hci storage nodeall versions
  • opensuse leap15.1
  • opensuse leap15.2

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

    • Linux kernel versions before 5.9-rc7affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:10linuxbefore 4.19.152-14.19.152-1
Debian:12linuxbefore 5.8.14-15.8.14-1
Debian:9linuxbefore 4.9.246-14.9.246-1
Debian:9linux-4.19before 4.19.152-1~deb9u14.19.152-1~deb9u1
openSUSE:Leap 15.1kernel-debugbefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.1kernel-defaultbefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.1kernel-docsbefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.1kernel-kvmsmallbefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.1kernel-obs-buildbefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.1kernel-obs-qabefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.1kernel-sourcebefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.1kernel-symsbefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.1kernel-vanillabefore 4.12.14-lp151.28.75.14.12.14-lp151.28.75.1
openSUSE:Leap 15.2kernel-debugbefore 5.3.18-lp152.47.25.3.18-lp152.47.2
openSUSE:Leap 15.2kernel-defaultbefore 5.3.18-lp152.47.25.3.18-lp152.47.2
openSUSE:Leap 15.2kernel-default-basebefore 5.3.18-lp152.50.1.lp152.8.10.15.3.18-lp152.50.1.lp152.8.10.1
openSUSE:Leap 15.2kernel-docsbefore 5.3.18-lp152.47.15.3.18-lp152.47.1
openSUSE:Leap 15.2kernel-kvmsmallbefore 5.3.18-lp152.47.25.3.18-lp152.47.2
openSUSE:Leap 15.2kernel-obs-buildbefore 5.3.18-lp152.47.25.3.18-lp152.47.2
openSUSE:Leap 15.2kernel-obs-qabefore 5.3.18-lp152.47.15.3.18-lp152.47.1
openSUSE:Leap 15.2kernel-preemptbefore 5.3.18-lp152.47.25.3.18-lp152.47.2
openSUSE:Leap 15.2kernel-sourcebefore 5.3.18-lp152.47.25.3.18-lp152.47.2
openSUSE:Leap 15.2kernel-symsbefore 5.3.18-lp152.47.15.3.18-lp152.47.1
Red Hat:enterprise_linux:7::clientbpftoolbefore 0:3.10.0-1160.21.1.el70:3.10.0-1160.21.1.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-2020-25641Oct 6, 2020 · A flaw was found in the Linux kernel's implementation of biovecs in versions before 5.9-rc7.
    22Monitor
  • ← EarlierCVE-2020-25643Oct 6, 2020 · A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7.
    29Monitor
  • Later →CVE-2020-27194Oct 16, 2020 · An issue was discovered in the Linux kernel before 5.8.15.
    23Monitor

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:linux5.8.14-1 · Debian:12Package registry (OSV)
debian:linux-4.194.19.152-1~deb9u1 · Debian:9Package registry (OSV)
opensuse:kernel-debug4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-default4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-default-base5.3.18-lp152.50.1.lp152.8.10.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-docs4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-kvmsmall4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-obs-build4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-obs-qa4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-preempt5.3.18-lp152.47.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-source4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-syms4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:kernel-vanilla4.12.14-lp151.28.75.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:bpftool0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:bpftool-debuginfo0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-abi-whitelists0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-debug0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-debug-debuginfo0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-debug-devel0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-debuginfo0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-debuginfo-common-x86_640:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-devel0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-doc0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:kernel-tools0:3.10.0-1160.21.1.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
suse:kernel-default4.12.14-197.64.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP1Package registry (OSV)
suse:kernel-default-base5.3.18-24.29.2.9.9.3 · SUSE:Linux Enterprise Module for Basesystem 15 SP2Package registry (OSV)
suse:kernel-docs4.12.14-197.64.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP1Package registry (OSV)
suse:kernel-livepatch-SLE15-SP1_Update_171-3.3.1 · SUSE:Linux Enterprise Live Patching 15 SP1Package registry (OSV)
suse:kernel-livepatch-SLE15-SP2_Update_51-5.3.3 · SUSE:Linux Enterprise Live Patching 15 SP2Package registry (OSV)

+7

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

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

No commit or PR link among the references.

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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-319 · Cleartext Transmission of Sensitive Information

CVSS vector

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

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.

Change log

  1. Fix✗ → ✓

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

References

Show all references (6 more)

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

All records