CriticalCVE-2022-33256

    Improper validation of array index in Multi-mode call processor (CVE-2022-33256)

    Published Sources: CVE.org

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    What is affected, what to do

    Memory corruption due to improper validation of array index in Multi-mode call processor.

    The available sources name no fixed version. Check the vendor guidance in the references below.

    Affected
    • Qualcomm Snapdragon eq AR8035..AR8035
    • Qualcomm Snapdragon eq QCA6390..QCA6390
    • Qualcomm Snapdragon eq QCA6391..QCA6391
    • Qualcomm Snapdragon eq QCA6421..QCA6421
    • Qualcomm Snapdragon eq QCA6426..QCA6426
    • Qualcomm Snapdragon eq QCA6431..QCA6431
    • Qualcomm Snapdragon eq QCA6436..QCA6436
    • Qualcomm Snapdragon eq QCA6574A..QCA6574A
    • Qualcomm Snapdragon eq QCA6574AU..QCA6574AU
    • Qualcomm Snapdragon eq QCA6595AU..QCA6595AU
    • Qualcomm Snapdragon eq QCA6696..QCA6696
    • Qualcomm Snapdragon eq QCA8081..QCA8081
    • Qualcomm Snapdragon eq QCA8337..QCA8337
    • Qualcomm Snapdragon eq QCM6490..QCM6490
    • Qualcomm Snapdragon eq QCN6024..QCN6024
    • Qualcomm Snapdragon eq QCN9024..QCN9024
    • Qualcomm Snapdragon eq QCS6490..QCS6490
    • Qualcomm Snapdragon eq QCX315..QCX315
    • Qualcomm Snapdragon eq SA515M..SA515M
    • Qualcomm Snapdragon eq SD 8 Gen1 5G..SD 8 Gen1 5G
    • Qualcomm Snapdragon eq SD480..SD480
    • Qualcomm Snapdragon eq SD690 5G..SD690 5G
    • Qualcomm Snapdragon eq SD695..SD695
    • Qualcomm Snapdragon eq SD750G..SD750G
    • Qualcomm Snapdragon eq SD765..SD765
    • Qualcomm Snapdragon eq SD765G..SD765G
    • Qualcomm Snapdragon eq SD768G..SD768G
    • Qualcomm Snapdragon eq SD778G..SD778G
    • Qualcomm Snapdragon eq SD780G..SD780G
    • Qualcomm Snapdragon eq SD855..SD855
    • Qualcomm Snapdragon eq SD865 5G..SD865 5G
    • Qualcomm Snapdragon eq SD870..SD870
    • Qualcomm Snapdragon eq SD888..SD888
    • Qualcomm Snapdragon eq SD888 5G..SD888 5G
    • Qualcomm Snapdragon eq SDX55..SDX55
    • Qualcomm Snapdragon eq SDX55M..SDX55M
    • Qualcomm Snapdragon eq SDX57M..SDX57M
    • Qualcomm Snapdragon eq SDX65..SDX65
    • Qualcomm Snapdragon eq SDX70M..SDX70M
    • Qualcomm Snapdragon eq SDXR2 5G..SDXR2 5G
    • Qualcomm Snapdragon eq SM7250P..SM7250P
    • Qualcomm Snapdragon eq SM7315..SM7315
    • Qualcomm Snapdragon eq SM7325P..SM7325P
    • Qualcomm Snapdragon eq Snapdragon 4 Gen 1..Snapdragon 4 Gen 1
    • Qualcomm Snapdragon eq WCD9341..WCD9341
    • Qualcomm Snapdragon eq WCD9360..WCD9360
    • Qualcomm Snapdragon eq WCD9370..WCD9370
    • Qualcomm Snapdragon eq WCD9375..WCD9375
    • Qualcomm Snapdragon eq WCD9380..WCD9380
    • Qualcomm Snapdragon eq WCD9385..WCD9385
    • Qualcomm Snapdragon eq WCN3988..WCN3988
    • Qualcomm Snapdragon eq WCN3991..WCN3991
    • Qualcomm Snapdragon eq WCN3998..WCN3998
    • Qualcomm Snapdragon eq WCN6740..WCN6740
    • Qualcomm Snapdragon eq WCN6750..WCN6750
    • Qualcomm Snapdragon eq WCN6850..WCN6850
    • Qualcomm Snapdragon eq WCN6851..WCN6851
    • Qualcomm Snapdragon eq WCN6855..WCN6855
    • Qualcomm Snapdragon eq WCN6856..WCN6856
    • Qualcomm Snapdragon eq WCN7850..WCN7850
    • Qualcomm Snapdragon eq WCN7851..WCN7851
    • Qualcomm Snapdragon eq WSA8810..WSA8810
    • Qualcomm Snapdragon eq WSA8815..WSA8815
    • Qualcomm Snapdragon eq WSA8830..WSA8830
    • Qualcomm Snapdragon eq WSA8835..WSA8835

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    9.8

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    9.8

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: CVE.org

    0.5 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 44.8

    Show all metrics
    Severity
    Critical
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    67.36 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    9.8 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    9.8
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.5 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    44.8
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 5 March 2025
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-129

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    Memory corruption due to improper validation of array index in Multi-mode call processor.

    Source: NVD (NIST), cvelistv5

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    Qualcomm, Inc.Snapdragon
    • QCN9024
    • SD778G
    • WCN6740
    • WCD9385
    • QCN6024
    • WSA8810
    • WSA8835
    • QCA6431
    • WCD9375
    • SDXR2 5G
    • SDX70M
    • SDX55
    • QCA6390
    • WCN6856
    • QCA6391
    • WSA8815
    • SM7315
    • SD690 5G
    • WCN6855
    • SD888 5G
    • QCA8081
    • WSA8830
    • SM7325P
    • SD765G
    • WCN7850
    • SD870
    • QCA6696
    • SM7250P
    • WCN3991
    • WCN7851
    • WCD9360
    • QCA6574A
    • WCN6851
    • SD780G
    • WCN6750
    • WCN3998
    • QCA8337
    • QCA6436
    • WCD9380
    • WCN6850
    • QCX315
    • Snapdragon 4 Gen 1
    • SD865 5G
    • SD 8 Gen1 5G
    • SDX57M
    • QCA6426
    • AR8035
    • QCA6595AU
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    Vendors and products

    Affected operating systems

    Affected operating systems
    Otherqualcommar8035_firmware—
    Otherqualcommqca6390_firmware—
    Otherqualcommqca6391_firmware—
    Otherqualcommqca6421_firmware—
    Otherqualcommqca6426_firmware—
    Otherqualcommqca6431_firmware—
    Otherqualcommqca6436_firmware—
    Otherqualcommqca6574a_firmware—
    Otherqualcommqca6574au_firmware—
    Otherqualcommqca6595au_firmware—
    Otherqualcommqca6696_firmware—
    Otherqualcommqca8081_firmware—
    Otherqualcommqca8337_firmware—
    Otherqualcommqcm6490_firmware—
    Otherqualcommqcn6024_firmware—
    Otherqualcommqcn9024_firmware—
    Otherqualcommqcs6490_firmware—
    Otherqualcommqcx315_firmware—
    Otherqualcommsa515m_firmware—
    Otherqualcommsd480_firmware—
    Otherqualcommsd690_5g_firmware—
    Otherqualcommsd695_firmware—
    Otherqualcommsd750g_firmware—
    Otherqualcommsd765_firmware—

    Weakness classes (CWE)

    • CWE-129Improper Validation of Array Index

      Variant

      The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

      Entry at MITRE CWE-129

    References & sources

    • qualcomm.comcompany/product-security/bulletins/march-2023-bulletinVendor advisory
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