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NVD / CVE Program· CNA Linux

CVE-2024-43867: drm/nouveau: prime: fix refcount underflow

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: 0.21% (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 16998763c62bb465ebc409d0373b9cdcef1a61a6, 2a1b327d57a8ac080977633a18999f032d7e9e3f, 3bcb8bba72ce89667fa863054956267c450c47ef.

Low priority for now. Upgrade to Linux Linux 16998763c62bb465ebc409d0373b9cdcef1a61a6, 2a1b327d57a8ac080977633a18999f032d7e9e3f, 3bcb8bba72ce89667fa863054956267c450c47ef 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/nouveau: prime: fix refcount underflow Calling nouveau_bo_ref() on a nouveau_bo without initializing it (and hence the backing ttm_bo) leads to a refcount underflow. Instead of calling nouveau_bo_ref() in the unwind path of drm_gem_object_init(), clean things up manually. (cherry picked from commit 1b93f3e89d03cfc576636e195466a0d728ad8de5)

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 20, 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-2024-43867

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 kernel3.9 and later · before 5.4.282
  • linux linux kernel5.5 and later · before 5.10.224
  • linux linux kernel5.11 and later · before 5.15.165
  • linux linux kernel5.16 and later · before 6.1.104
  • linux linux kernel6.2 and later · before 6.6.45
  • linux linux kernel6.7 and later · before 6.10.4
  • linux linux kernel6.11

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

    • 3.9affected
    • ab9ccb96a6e6f95bcde6b8b2a524370efdbfdcd6 and later · before 3bcb8bba72ce89667fa863054956267c450c47efaffected · git
    • ab9ccb96a6e6f95bcde6b8b2a524370efdbfdcd6 and later · before 906372e753c5027a1dc88743843b6aa2ad1aaecfaffected · git
    • ab9ccb96a6e6f95bcde6b8b2a524370efdbfdcd6 and later · before 16998763c62bb465ebc409d0373b9cdcef1a61a6affected · git
    • ab9ccb96a6e6f95bcde6b8b2a524370efdbfdcd6 and later · before ebebba4d357b6c67f96776a48ddbaf0060fa4c10affected · git
    • ab9ccb96a6e6f95bcde6b8b2a524370efdbfdcd6 and later · before f23cd66933fe76b84d8e282e5606b4d99068c320affected · git
    • ab9ccb96a6e6f95bcde6b8b2a524370efdbfdcd6 and later · before 2a1b327d57a8ac080977633a18999f032d7e9e3faffected · git
    • ab9ccb96a6e6f95bcde6b8b2a524370efdbfdcd6 and later · before a9bf3efc33f1fbf88787a277f7349459283c9b95affected · git
    • before 3.9not affected · semver
    • 5.4.282 and later · up to and including 5.4.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.106-16.1.106-1
Debian:13linuxbefore 6.10.4-16.10.4-1

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-2024-43865Aug 20, 2024 · s390/fpu: Re-add exception handling in load_fpu_state()
    22Monitor
  • ← EarlierCVE-2024-43866Aug 20, 2024 · net/mlx5: Always drain health in shutdown callback
    18Monitor
  • Later →CVE-2024-43868Aug 20, 2024 · riscv/purgatory: align riscv_kernel_entry
    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 Linux16998763c62bb465ebc409d0373b9cdcef1a61a6Vendor (CNA)
Linux Linux2a1b327d57a8ac080977633a18999f032d7e9e3fVendor (CNA)
Linux Linux3bcb8bba72ce89667fa863054956267c450c47efVendor (CNA)
Linux Linux906372e753c5027a1dc88743843b6aa2ad1aaecfVendor (CNA)
Linux Linuxa9bf3efc33f1fbf88787a277f7349459283c9b95Vendor (CNA)
Linux Linuxebebba4d357b6c67f96776a48ddbaf0060fa4c10Vendor (CNA)
Linux Linuxf23cd66933fe76b84d8e282e5606b4d99068c320Vendor (CNA)
debian:linux6.1.106-1 · Debian:12Package 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.

  • CVE-2024-26828125 days apartcifs: fix underflow in parse_server_interfaces()
    37Monitor
  • CVE-2024-4675929 days aparthwmon: (adc128d818) Fix underflows seen when writing limit attributes
    31Monitor
  • CVE-2024-5306191 days apartmedia: s5p-jpeg: prevent buffer overflows
    31Monitor
  • CVE-2024-26913125 days apartdrm/amd/display: Fix dcn35 8k30 Underflow/Corruption Issue
    31Monitor
  • CVE-2024-0565218 days apartKernel: cifs filesystem decryption improper input validation remote code execution vulnerability in function receive_encrypted_standard of client
    30Monitor
  • CVE-2022-49278190 days apartremoteproc: Fix count check in rproc_coredump_write()
    28Monitor

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

  • 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-191 · Integer Underflow (Wrap or Wraparound)

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 (8 more)

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

All records