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NVD / CVE Program· CNA mitre

CVE-2020-8432: In Das U-Boot through 2020.01, a double free has been found in the cmd/gpt.c do_rename_gpt_parts() function.

Noroxi assessment

Priority: Plan (action score 40/100)

  • 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: 3% (FIRST EPSS); higher than 87.5% 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: u-boot (Debian:12) 2020.01+dfsg-2; u-boot (openSUSE:Leap 15.1) 2019.01-lp151.6.13.1; u-boot (openSUSE:Leap 15.2) 2020.01-lp152.9.9.1.

Add it to your regular patch cycle. Upgrade to u-boot (Debian:12) 2020.01+dfsg-2; u-boot (openSUSE:Leap 15.1) 2019.01-lp151.6.13.1; u-boot (openSUSE:Leap 15.2) 2020.01-lp152.9.9.1 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

In Das U-Boot through 2020.01, a double free has been found in the cmd/gpt.c do_rename_gpt_parts() function. Double freeing may result in a write-what-where condition, allowing an attacker to execute arbitrary code. NOTE: this vulnerablity was introduced when attempting to fix a memory leak identified by static analysis.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Jan 29, 2020
Updated
Jun 16, 2026
EPSS
3.0% · 87th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.0%

Get told when this record changes

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

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • 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
denxu-boot
opensuseleap

Affected versions

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

  • denx u-bootup to 2020.01 inclusive
  • opensuse leap15.2

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12u-bootbefore 2020.01+dfsg-22020.01+dfsg-2
openSUSE:Leap 15.1u-bootbefore 2019.01-lp151.6.13.12019.01-lp151.6.13.1
openSUSE:Leap 15.2u-bootbefore 2020.01-lp152.9.9.12020.01-lp152.9.9.1
SUSE:Linux Enterprise High Performance Computing 15-ESPOSu-bootbefore 2018.03-4.6.12018.03-4.6.1
SUSE:Linux Enterprise High Performance Computing 15-ESPOSu-boot-rpi3before 2018.03-4.6.22018.03-4.6.2
SUSE:Linux Enterprise Module for Basesystem 15 SP1u-bootbefore 2019.01-7.10.12019.01-7.10.1
SUSE:Linux Enterprise Module for Basesystem 15 SP1u-boot-rpi3before 2019.01-7.10.22019.01-7.10.2
SUSE:Linux Enterprise Module for Basesystem 15 SP2u-bootbefore 2020.01-10.9.12020.01-10.9.1
SUSE:Linux Enterprise Module for Basesystem 15 SP2u-boot-rpiarm64before 2020.01-10.9.12020.01-10.9.1
SUSE:Linux Enterprise Server 12 SP4-LTSSu-bootbefore 2018.03-4.3.12018.03-4.3.1
SUSE:Linux Enterprise Server 12 SP4-LTSSu-boot-rpi3before 2018.03-4.3.12018.03-4.3.1
SUSE:Linux Enterprise Server 12 SP5u-bootbefore 2019.01-5.3.12019.01-5.3.1
SUSE:Linux Enterprise Server 12 SP5u-boot-rpi3before 2019.01-5.3.12019.01-5.3.1

Same product

denx: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-34835In Das U-Boot through 2022.07-rc5, an integer signedness error and resultant stack-based buffer overflow in the "i2c md" command enables the
    40Plan
  • CVE-2022-30767nfs_lookup_reply in net/nfs.c in Das U-Boot through 2022.04 (and through 2022.07-rc2) has an unbounded memcpy with a failed length check, le
    40Plan
  • CVE-2019-14204An issue was discovered in Das U-Boot through 2019.07.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2019-13105Aug 6, 2019 · Das U-Boot versions 2019.07-rc1 through 2019.07-rc4 can double-free a cached block of data when listing files in a crafted ext4 filesystem.
    31Monitor
  • ← EarlierCVE-2019-13106Aug 6, 2019 · Das U-Boot versions 2016.09 through 2019.07-rc4 can memset() too much data while reading a crafted ext4 filesystem, which results in a stack
    32Monitor
  • Later →CVE-2020-10648Mar 19, 2020 · Das U-Boot through 2020.01 allows attackers to bypass verified boot restrictions and subsequently boot arbitrary images by providing a craft
    31Monitor

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:u-boot2020.01+dfsg-2 · Debian:12Package registry (OSV)
opensuse:u-boot2020.01-lp152.9.9.1 · openSUSE:Leap 15.2Package registry (OSV)
suse:u-boot2020.01-10.9.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP2Package registry (OSV)
suse:u-boot-rpi32019.01-5.3.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:u-boot-rpiarm642020.01-10.9.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP2Package registry (OSV)

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-1% in 7 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).

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

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (2 more)

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

All records