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NVD / CVE Program· CNA Linux

CVE-2024-35963: Bluetooth: hci_sock: Fix not validating setsockopt user input

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: 0.24% (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 0c18a64039aa3f1c16f208d197c65076da798137, 50173882bb187e70e37bac01385b9b114019bee2, 781f3a97a38a338bc893b6db7f9f9670bf1a9e37.

Low priority for now. Upgrade to Linux Linux 0c18a64039aa3f1c16f208d197c65076da798137, 50173882bb187e70e37bac01385b9b114019bee2, 781f3a97a38a338bc893b6db7f9f9670bf1a9e37 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: Bluetooth: hci_sock: Fix not validating setsockopt user input Check user input length before copying data.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
May 20, 2024
Updated
Aug 5, 2026
EPSS
0.2% · 15th 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.

CNA vs NVD score

NVD
7.1
CNA · Linux
7.1
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2024-35963

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 kernel5.16 and later · before 6.1.113
  • linux linux kernel6.2 and later · before 6.6.55
  • linux linux kernel6.7 and later · before 6.8.7
  • linux linux kernel6.9

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

    • 5.16affected
    • 09572fca7223bcf32c9f0d5e100d8381a81d55f4 and later · before 781f3a97a38a338bc893b6db7f9f9670bf1a9e37affected · git
    • 09572fca7223bcf32c9f0d5e100d8381a81d55f4 and later · before 0c18a64039aa3f1c16f208d197c65076da798137affected · git
    • 09572fca7223bcf32c9f0d5e100d8381a81d55f4 and later · before 50173882bb187e70e37bac01385b9b114019bee2affected · git
    • 09572fca7223bcf32c9f0d5e100d8381a81d55f4 and later · before b2186061d6043d6345a97100460363e990af0d46affected · git
    • before 5.16not affected · semver
    • 6.1.113 and later · up to and including 6.1.*not affected · semver
    • 6.6.55 and later · up to and including 6.6.*not affected · semver
    • 6.8.7 and later · up to and including 6.8.*not affected · semver
    • 6.9 and laternot affected · original_commit_for_fix

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:11linux-6.1before 6.1.119-1~deb11u16.1.119-1~deb11u1
Debian:12linuxbefore 6.1.115-16.1.115-1
Debian:13linuxbefore 6.8.9-16.8.9-1

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-2024-35959May 20, 2024 · net/mlx5e: Fix mlx5e_priv_init() cleanup flow
    22Monitor
  • ← EarlierCVE-2024-35961May 20, 2024 · net/mlx5: Register devlink first under devlink lock
    22Monitor
  • Later →CVE-2024-35964May 20, 2024 · Bluetooth: ISO: Fix not validating setsockopt user input
    28Monitor

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 Linux0c18a64039aa3f1c16f208d197c65076da798137Vendor (CNA)
Linux Linux50173882bb187e70e37bac01385b9b114019bee2Vendor (CNA)
Linux Linux781f3a97a38a338bc893b6db7f9f9670bf1a9e37Vendor (CNA)
Linux Linuxb2186061d6043d6345a97100460363e990af0d46Vendor (CNA)
debian:linux6.1.115-1 · Debian:12Package registry (OSV)
debian:linux-6.16.1.119-1~deb11u1 · Debian:11Package 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.

  • CVE-2021-472511 days apartmac80211: fix skb length check in ieee80211_scan_rx()
    31Monitor
  • CVE-2024-359640 days apartBluetooth: ISO: Fix not validating setsockopt user input
    28Monitor
  • CVE-2024-359650 days apartBluetooth: L2CAP: Fix not validating setsockopt user input
    28Monitor
  • CVE-2024-3865932 days apartenic: Validate length of nl attributes in enic_set_vf_port
    28Monitor
  • CVE-2024-56716223 days apartnetdevsim: prevent bad user input in nsim_dev_health_break_write()
    22Monitor
  • CVE-2022-50020394 days apartext4: avoid resizing to a partial cluster size
    22Monitor

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
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-1284 · Improper Validation of Specified Quantity in Input

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.

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 (4 more)

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

All records