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CVE-2021-35134· NVD / CVE Program· CNA qualcomm

Due to insufficient validation of ELF headers, an Incorrect Calculation of Buffer Size can occur in Boot leading to memory corruption in Sna

Due to insufficient validation of ELF headers, an Incorrect Calculation of Buffer Size can occur in Boot leading to memory corruption in Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile

HighCVSS 8.4 · v3.1—No exploit No fix recorded
Published
Sep 2, 2022
Updated
Jun 16, 2026
EPSS
0.1% · 2th percentile
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Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
33 / 40 · 8.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
8.4
CNA · qualcomm
8.4
agree

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.

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Affected systems

VendorProduct
qualcommqca6391 firmware
qualcommqca6391
qualcommqcm6490 firmware
qualcommqcm6490
qualcommqcs6490 firmware
qualcommqcs6490
qualcommqsm8350 firmware
qualcommqsm8350
qualcommsd 8 gen1 5g firmware
qualcommsm8475
qualcommsd778g firmware
qualcommsd778g

and 47 more

Affected versions

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

  • qualcomm qca6391 firmwareall versions
  • qualcomm qcm6490 firmwareall versions
  • qualcomm qcs6490 firmwareall versions
  • qualcomm qsm8350 firmwareall versions
  • qualcomm sd 8 gen1 5g firmwareall versions
  • qualcomm sd778g firmwareall versions
  • qualcomm sd780g firmwareall versions
  • qualcomm sd888 5g firmwareall versions
  • qualcomm sd888 firmwareall versions
  • qualcomm sm7315 firmwareall versions
  • qualcomm sm7325p firmwareall versions
  • qualcomm sm7450 firmwareall versions
  • qualcomm sm8475 firmwareall versions
  • qualcomm sm8475p firmwareall versions
  • qualcomm wcd9341 firmwareall versions
  • qualcomm wcd9370 firmwareall versions
  • qualcomm wcd9375 firmwareall versions
  • qualcomm wcd9380 firmwareall versions
  • qualcomm wcd9385 firmwareall versions
  • qualcomm wcn6740 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 Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile

    • QCA6391, QCM6490, QCS6490, QSM8350, SD 8 Gen1 5G, SD778G, SD780G, SD888, SD888 5G, SM7315, SM7325P, SM7450, SM8475, SM8475P, WCD9341, WCD9370, WCD9375, WCD9380, WCD9385, WCN6740, WCN6750, WCN6850, WCNaffected

Same product

qualcomm: all records

Other highest-scoring records for the same primary product.

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.

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).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • 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
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-131 · Incorrect Calculation of Buffer Size

CVSS vector

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

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.

All records