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NVD / CVE Program· CNA Linux

CVE-2021-47288: media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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: 0.23% (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 4487b968e5eacd02c493303dc2b61150bb7fe4b2, 8d4abca95ecc82fc8c41912fa0085281f19cc29f, b9a178f189bb6d75293573e181928735f5e3e070.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 4487b968e5eacd02c493303dc2b61150bb7fe4b2, 8d4abca95ecc82fc8c41912fa0085281f19cc29f, b9a178f189bb6d75293573e181928735f5e3e070 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: media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf() Fix an 11-year old bug in ngene_command_config_free_buf() while addressing the following warnings caught with -Warray-bounds: arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds] arch/x86/include/asm/string_32.h:182:25: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds] The problem is that the original code is trying to copy 6 bytes of data into a one-byte size member _config_ of the wrong structue FW_CONFIGURE_BUFFERS, in a single call to memcpy(). This causes a legitimate compiler warning because memcpy() overruns the length of &com.cmd.ConfigureBuffers.config. It seems that the right structure is FW_CONFIGURE_FREE_BUFFERS, instead, because it contains 6 more members apart from the header _hdr_. Also, the name of the function ngene_command_config_free_buf() suggests that the actual intention is to ConfigureFreeBuffers, instead of ConfigureBuffers (which takes place in the function ngene_command_config_buf(), above). Fix this by enclosing those 6 members of struct FW_CONFIGURE_FREE_BUFFERS into new struct config, and use &com.cmd.ConfigureFreeBuffers.config as the destination address, instead of &com.cmd.ConfigureBuffers.config, when calling memcpy(). This also helps with the ongoing efforts to globally enable -Warray-bounds and get us closer to being able to tighten the FORTIFY_SOURCE routines on memcpy().

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
May 21, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 14th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 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.

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When you'll hear from us

  • when it enters CISA KEV
  • 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

Affected versions

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

  • linux linux kernel2.6.34 and later · before 4.4.277
  • linux linux kernel4.5 and later · before 4.9.277
  • linux linux kernel4.10 and later · before 4.14.241
  • linux linux kernel4.15 and later · before 4.19.199
  • linux linux kernel4.20 and later · before 5.4.136
  • linux linux kernel5.5 and later · before 5.10.54
  • linux linux kernel5.11 and later · before 5.13.6
  • linux linux kernel5.14

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

    • 2.6.34affected
    • dae52d009fc950b5c209260d50fcc000f5becd3c and later · before 4487b968e5eacd02c493303dc2b61150bb7fe4b2affected · git
    • dae52d009fc950b5c209260d50fcc000f5becd3c and later · before c6ddeb63dd543b5474b0217c4e47538b7ffd7686affected · git
    • dae52d009fc950b5c209260d50fcc000f5becd3c and later · before e818f2ff648581a6c553ae2bebc5dcef9a8bb90caffected · git
    • dae52d009fc950b5c209260d50fcc000f5becd3c and later · before ec731c6ef564ee6fc101fc5d73e3a3a953d09a00affected · git
    • dae52d009fc950b5c209260d50fcc000f5becd3c and later · before e617fa62f6cf859a7b042cdd6c73af905ff8fca3affected · git
    • dae52d009fc950b5c209260d50fcc000f5becd3c and later · before e991457afdcb5f4dbc5bc9d79eaf775be33e7092affected · git
    • dae52d009fc950b5c209260d50fcc000f5becd3c and later · before b9a178f189bb6d75293573e181928735f5e3e070affected · git
    • dae52d009fc950b5c209260d50fcc000f5becd3c and later · before 8d4abca95ecc82fc8c41912fa0085281f19cc29faffected · git
    • before 2.6.34not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.14.6-15.14.6-1
SUSE:Linux Enterprise Micro 5.1kernel-rtbefore 5.3.18-150300.211.15.3.18-150300.211.1
SUSE:Linux Enterprise Micro 5.1kernel-source-rtbefore 5.3.18-150300.211.15.3.18-150300.211.1

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-2021-47286May 21, 2024 · bus: mhi: core: Validate channel ID when processing command completions
    31Monitor
  • ← EarlierCVE-2021-47287May 21, 2024 · driver core: auxiliary bus: Fix memory leak when driver_register() fail
    22Monitor
  • Later →CVE-2021-47289May 21, 2024 · ACPI: fix NULL pointer dereference
    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 Linux4487b968e5eacd02c493303dc2b61150bb7fe4b2Vendor (CNA)
Linux Linux8d4abca95ecc82fc8c41912fa0085281f19cc29fVendor (CNA)
Linux Linuxb9a178f189bb6d75293573e181928735f5e3e070Vendor (CNA)
Linux Linuxc6ddeb63dd543b5474b0217c4e47538b7ffd7686Vendor (CNA)
Linux Linuxe617fa62f6cf859a7b042cdd6c73af905ff8fca3Vendor (CNA)
Linux Linuxe818f2ff648581a6c553ae2bebc5dcef9a8bb90cVendor (CNA)
Linux Linuxe991457afdcb5f4dbc5bc9d79eaf775be33e7092Vendor (CNA)
Linux Linuxec731c6ef564ee6fc101fc5d73e3a3a953d09a00Vendor (CNA)
debian:linux5.14.6-1 · Debian:12Package registry (OSV)
suse:kernel-rt5.3.18-150300.211.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:kernel-source-rt5.3.18-150300.211.1 · SUSE:Linux Enterprise Micro 5.1Package 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.

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.

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
high · data can be read
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
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

ATT&CK techniques

—

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