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CVE-2021-47445· NVD / CVE Program· CNA Linux

drm/msm: Fix null pointer dereference on pointer edp

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.22% (FIRST EPSS).
  • 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 Linux 0cd063aa0a09822cc1620fc59a67fe2f9f6338ac, 2133c4fc8e1348dcb752f267a143fe2254613b34, 46c8ddede0273d1d132beefa9de8b820326982be.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0cd063aa0a09822cc1620fc59a67fe2f9f6338ac, 2133c4fc8e1348dcb752f267a143fe2254613b34, 46c8ddede0273d1d132beefa9de8b820326982be 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 the Linux kernel, the following vulnerability has been resolved: drm/msm: Fix null pointer dereference on pointer edp The initialization of pointer dev dereferences pointer edp before edp is null checked, so there is a potential null pointer deference issue. Fix this by only dereferencing edp after edp has been null checked. Addresses-Coverity: ("Dereference before null check")

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 22, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 12th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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.

Follow CVE-2021-47445

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
linuxlinux kernel

Affected versions

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

  • linux linux kernel4.0 and later · before 4.4.290
  • linux linux kernel4.5 and later · before 4.9.288
  • linux linux kernel4.10 and later · before 4.14.252
  • linux linux kernel4.15 and later · before 4.19.213
  • linux linux kernel4.20 and later · before 5.4.155
  • linux linux kernel5.5 and later · before 5.10.75
  • linux linux kernel5.11 and later · before 5.14.14
  • linux linux kernel5.15

Versions reported by the vendor

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

  • Linux Linux

    • 4.0affected
    • ab5b0107ccf3821a6837b0f2819270d6fa0b278f and later · before f175b9a83e5c252d7c74acddc792840016caae0aaffected · git
    • ab5b0107ccf3821a6837b0f2819270d6fa0b278f and later · before bacac7d26849c8e903ceb7466d9ce8dc3c2797ebaffected · git
    • ab5b0107ccf3821a6837b0f2819270d6fa0b278f and later · before 0cd063aa0a09822cc1620fc59a67fe2f9f6338acaffected · git
    • ab5b0107ccf3821a6837b0f2819270d6fa0b278f and later · before 7f642b93710b6b1119bdff90be01e6b5a2a5d669affected · git
    • ab5b0107ccf3821a6837b0f2819270d6fa0b278f and later · before f302be08e3de94db8863a0b2958b2bb3e8e998e6affected · git
    • ab5b0107ccf3821a6837b0f2819270d6fa0b278f and later · before 91a340768b012f5b910a203a805b97a345b3db37affected · git
    • ab5b0107ccf3821a6837b0f2819270d6fa0b278f and later · before 46c8ddede0273d1d132beefa9de8b820326982beaffected · git
    • ab5b0107ccf3821a6837b0f2819270d6fa0b278f and later · before 2133c4fc8e1348dcb752f267a143fe2254613b34affected · git
    • before 4.0not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.14.16-15.14.16-1
SUSE:Linux Enterprise Real Time 12 SP5kernel-rtbefore 4.12.14-10.191.14.12.14-10.191.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-rt_debugbefore 4.12.14-10.191.14.12.14-10.191.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-source-rtbefore 4.12.14-10.191.14.12.14-10.191.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-syms-rtbefore 4.12.14-10.191.14.12.14-10.191.1
SUSE:Linux Enterprise Server 12 SP5kernel-azurebefore 4.12.14-16.191.14.12.14-16.191.1
SUSE:Linux Enterprise Server 12 SP5kernel-source-azurebefore 4.12.14-16.191.14.12.14-16.191.1
SUSE:Linux Enterprise Server 12 SP5kernel-syms-azurebefore 4.12.14-16.191.14.12.14-16.191.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2021-47443May 22, 2024 · NFC: digital: fix possible memory leak in digital_tg_listen_mdaa()
    22Monitor
  • ← EarlierCVE-2021-47444May 22, 2024 · drm/edid: In connector_bad_edid() cap num_of_ext by num_blocks read
    22Monitor
  • Later →CVE-2021-47446May 22, 2024 · drm/msm/a4xx: fix error handling in a4xx_gpu_init()
    22Monitor

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
Linux Linux0cd063aa0a09822cc1620fc59a67fe2f9f6338acVendor (CNA)
Linux Linux2133c4fc8e1348dcb752f267a143fe2254613b34Vendor (CNA)
Linux Linux46c8ddede0273d1d132beefa9de8b820326982beVendor (CNA)
Linux Linux7f642b93710b6b1119bdff90be01e6b5a2a5d669Vendor (CNA)
Linux Linux91a340768b012f5b910a203a805b97a345b3db37Vendor (CNA)
Linux Linuxbacac7d26849c8e903ceb7466d9ce8dc3c2797ebVendor (CNA)
Linux Linuxf175b9a83e5c252d7c74acddc792840016caae0aVendor (CNA)
Linux Linuxf302be08e3de94db8863a0b2958b2bb3e8e998e6Vendor (CNA)
debian:linux5.14.16-1 · Debian:12Package registry (OSV)
suse:kernel-azure4.12.14-16.191.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:kernel-rt4.12.14-10.191.1 · SUSE:Linux Enterprise Real Time 12 SP5Package registry (OSV)
suse:kernel-rt_debug4.12.14-10.191.1 · SUSE:Linux Enterprise Real Time 12 SP5Package registry (OSV)
suse:kernel-source-azure4.12.14-16.191.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:kernel-source-rt4.12.14-10.191.1 · SUSE:Linux Enterprise Real Time 12 SP5Package registry (OSV)
suse:kernel-syms-azure4.12.14-16.191.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:kernel-syms-rt4.12.14-10.191.1 · SUSE:Linux Enterprise Real Time 12 SP5Package 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

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

  • 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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 (7 more)

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

All records