Buffer Copy Without Checking Size of Input in WLAN Host
Memory corruption in WLAN Host while setting the PMK length in PMK length in internal cache.
- Published
- Dec 4, 2023
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 4th percentile
- CWE
- CWE-120
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.8
- CNA · qualcomm
- 6.7
- 1.1 point gap
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| qualcomm | ar8035 firmware | cpe:2.3:o:qualcomm:ar8035_firmware |
| qualcomm | ar8035 | cpe:2.3:h:qualcomm:ar8035 |
| qualcomm | fastconnect 6900 firmware | cpe:2.3:o:qualcomm:fastconnect_6900_firmware |
| qualcomm | fastconnect 6900 | cpe:2.3:h:qualcomm:fastconnect_6900 |
| qualcomm | fastconnect 7800 firmware | cpe:2.3:o:qualcomm:fastconnect_7800_firmware |
| qualcomm | fastconnect 7800 | cpe:2.3:h:qualcomm:fastconnect_7800 |
| qualcomm | qam8295p firmware | cpe:2.3:o:qualcomm:qam8295p_firmware |
| qualcomm | qam8295p | cpe:2.3:h:qualcomm:qam8295p |
| qualcomm | qca6391 firmware | cpe:2.3:o:qualcomm:qca6391_firmware |
| qualcomm | qca6391 | cpe:2.3:h:qualcomm:qca6391 |
| qualcomm | qca6574au firmware | cpe:2.3:o:qualcomm:qca6574au_firmware |
| qualcomm | qca6574au | cpe:2.3:h:qualcomm:qca6574au |
and 76 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- qualcomm ar8035 firmwareall versions
- qualcomm fastconnect 6900 firmwareall versions
- qualcomm fastconnect 7800 firmwareall versions
- qualcomm qam8295p firmwareall versions
- qualcomm qca6391 firmwareall versions
- qualcomm qca6574au firmwareall versions
- qualcomm qca6595au firmwareall versions
- qualcomm qca6696 firmwareall versions
- qualcomm qca8081 firmwareall versions
- qualcomm qca8337 firmwareall versions
- qualcomm qcc710 firmwareall versions
- qualcomm qcn6224 firmwareall versions
- qualcomm qcn6274 firmwareall versions
- qualcomm qcs410 firmwareall versions
- qualcomm qcs610 firmwareall versions
- qualcomm qfw7114 firmwareall versions
- qualcomm qfw7124 firmwareall versions
- qualcomm sa6145p firmwareall versions
- qualcomm sa6150p firmwareall versions
- qualcomm sa6155p firmwareall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (qualcomm). Independent of NVD's CPE analysis and usually ahead of it.
Qualcomm, Inc. Snapdragon
- AR8035, FastConnect 6900, FastConnect 7800, QAM8295P, QCA6391, QCA6574AU, QCA6595AU, QCA6696, QCA8081, QCA8337, QCC710, QCN6224 … (+28)affected
Same product
qualcomm: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-33106Use of Out-of-range Pointer Offset in GraphicsKEV61This week
- CVE-2024-49839Buffer Over-read in WLAN Host Cmn39Monitor
- CVE-2024-45569Improper Validation of Array Index in WLAN Host Communication39Monitor
- CVE-2024-21480Buffer Copy Without Checking Size of Input (`Classic Buffer Overflow`) in Audio39Monitor
- CVE-2024-21473Improper Input Validation in WIN SON39Monitor
- CVE-2024-21463Buffer Copy Without Checking Size of Input in Audio39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
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.
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 researchersFinders, 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-2023-330820 days apartBuffer Copy Without Checking Size of Input (`Classic Buffer Overflow`) in WLAN Host39Monitor
- CVE-2023-330830 days apartBuffer Copy Without Checking Size of Input (`Classic Buffer Overflow`) in WLAN Host39Monitor
- CVE-2023-3304527 days apartBuffer Copy Without Checking Size of Input in WLAN Firmware39Monitor
- CVE-2023-3302529 days apartBuffer Copy without Checking Size of Input in Data Modem39Monitor
- CVE-2023-2858291 days apartBuffer Copy Without Checking Size of Input in Data Modem39Monitor
- CVE-2024-21463119 days apartBuffer Copy Without Checking Size of Input in Audio39Monitor
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
- high · data or configuration can be modified
- 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
- High
- Availability impact
- High
Weakness class (CWE)
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Root cause
When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.
The bug in code
The whole CWE-120 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
char buf[256];memcpy(buf, pkt->data, pkt->len);Fixed
char buf[256];if (pkt->len > sizeof(buf)) { return -EINVAL;}memcpy(buf, pkt->data, pkt->len);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Overflow BuffersCAPEC-100likelihood: High · Very High
- Client-side Injection-induced Buffer OverflowCAPEC-14likelihood: Medium · High
- Filter Failure through Buffer OverflowCAPEC-24likelihood: High · High
- MIME ConversionCAPEC-42likelihood: High · High
- Overflow Binary Resource FileCAPEC-44likelihood: High · Very High
- Buffer Overflow via Symbolic LinksCAPEC-45likelihood: High · High
- Overflow Variables and TagsCAPEC-46likelihood: High · High
ATT&CK techniques
—
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.