HighCVE-2019-14816

    Linux Kernel: Heap-based Buffer Overflow (CVE-2019-14816)

    Published Sources: CVE.org

    What is affected, what to do

    There is heap-based buffer overflow in kernel, all versions up to, excluding 5.3, in the marvell wifi chip driver in Linux kernel, that allows local users to cause a denial of service(system crash) or possibly execute arbitrary code.

    An exploit is publicly available. The available sources name no fixed version. Check the vendor guidance in the references below.

    Affected
    • Linux Kernel eq all versions up to, excluding 5.3..all versions up to, excluding 5.3

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

    Metrics

    7.8

    Priority

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

    Source: NVD, CVSS v3

    5.5

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: CVE.org

    0.9 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 59.8

    Show all metrics
    Severity
    High
    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
    56.08 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
    PoC (publicly reported)
    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
    7.8 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
    5.5
    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
    0.9 %
    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
    59.8
    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
    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-122

    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

    There is heap-based buffer overflow in kernel, all versions up to, excluding 5.3, in the marvell wifi chip driver in Linux kernel, that allows local users to cause a denial of service(system crash) or possibly execute arbitrary code.

    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
    Linuxkernel
    • all versions up to, excluding 5.3
    • —
    netappdata_availability_services
    • —
    • —
    netapphci_management_node
    • —
    • —
    netappservice_processor
    • —
    • —
    netappsolidfire
    • —
    • —
    netappsteelstore_cloud_integrated_storage
    • —
    • —
    redhatvirtualization
    • 4.0
    • —

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebiandebian_linux8.0
    Linuxredhatenterprise_linux5.0
    Linuxredhatenterprise_linux6.0
    Linuxredhatenterprise_linux6.4
    Linuxredhatenterprise_linux7.0
    Linuxredhatenterprise_linux7.6
    Linuxredhatenterprise_linux8.0
    Linuxredhatenterprise_linux_compute_node_eus7.6
    Linuxredhatenterprise_linux_eus7.6
    Linuxredhatenterprise_linux_eus7.7
    Linuxredhatenterprise_linux_eus8.1
    Linuxredhatenterprise_linux_eus8.2
    Linuxredhatenterprise_linux_eus8.4
    Linuxredhatenterprise_linux_for_power_big_endian_eus7.6_ppc64
    Linuxredhatenterprise_linux_for_real_time7
    Linuxredhatenterprise_linux_for_real_time8
    Linuxredhatenterprise_linux_for_real_time_for_nfv7
    Linuxredhatenterprise_linux_for_real_time_for_nfv8
    Linuxredhatenterprise_linux_for_real_time_for_nfv_tus8.2
    Linuxredhatenterprise_linux_for_real_time_for_nfv_tus8.4
    Linuxredhatenterprise_linux_for_real_time_tus8.2
    Linuxredhatenterprise_linux_for_real_time_tus8.4
    Linuxredhatenterprise_linux_server7.6
    Linuxredhatenterprise_linux_server8.0

    Weakness classes (CWE)

    • CWE-122Heap-based Buffer Overflow

      Variant

      A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

      Entry at MITRE CWE-122

    Public exploit references

    Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

    Public exploit references
    Reference tagged as exploitbugzilla.redhat.com (opens in a new tab)PoC (publicly reported)reported, not verified—
    Reference tagged as exploitopenwall.com (opens in a new tab)PoC (publicly reported)reported, not verified—
    Packet StormKernel Live Patch Security Notice LSN 0058 1 (opens in a new tab)packetstormsecurity.comPoC (publicly reported)reported, not verified—
    Packet StormSlackware Security Advisory Slackware 14.2 kernel Updates (opens in a new tab)packetstormsecurity.comPoC (publicly reported)reported, not verified—

    References & sources

    • openwall.com[oss-security] 20190828 Linux kernel: three heap overflow in the marvell wifi driverMailing list, x_refsource_MLIST, Exploit, Mailing list, Patch, Third-party advisory
    • lists.fedoraproject.orgFEDORA-2019-4c91a2f76eVendor advisory, x_refsource_FEDORA, Issue tracking, Third-party advisory
    • lists.fedoraproject.orgFEDORA-2019-97380355aeVendor advisory, x_refsource_FEDORA, Issue tracking, Third-party advisory
    • bugzilla.redhat.comshow_bug.cgi?id=CVE-2019-14816x_refsource_CONFIRM, Exploit, Issue tracking, Patch, Third-party advisory
    • openwall.comlists/oss-security/2019/08/28/1x_refsource_MISC, Exploit, Mailing list, Patch, Third-party advisory
    • github.comtorvalds/linux/commit/7caac62ed598a196d6ddf8d9c121e12e082cac3x_refsource_MISC, Patch, Third-party advisory
    • access.redhat.comsecurity/cve/cve-2019-14816x_refsource_MISC, Third-party advisory
    • lists.opensuse.orgopenSUSE-SU-2019:2173Vendor advisory, x_refsource_SUSE, Mailing list, Third-party advisory
    • lists.opensuse.orgopenSUSE-SU-2019:2181Vendor advisory, x_refsource_SUSE, Mailing list, Third-party advisory
    • lists.debian.org[debian-lts-announce] 20190925 [SECURITY] [DLA 1930-1] linux security updateMailing list, x_refsource_MLIST, Mailing list, Third-party advisory
    • usn.ubuntu.comUSN-4157-1Vendor advisory, x_refsource_UBUNTU, Third-party advisory
    • usn.ubuntu.comUSN-4162-1Vendor advisory, x_refsource_UBUNTU, Third-party advisory
    • usn.ubuntu.comUSN-4157-2Vendor advisory, x_refsource_UBUNTU, Third-party advisory
    • usn.ubuntu.comUSN-4163-1Vendor advisory, x_refsource_UBUNTU, Third-party advisory
    • usn.ubuntu.comUSN-4163-2Vendor advisory, x_refsource_UBUNTU, Third-party advisory
    • usn.ubuntu.comUSN-4162-2Vendor advisory, x_refsource_UBUNTU, Third-party advisory
    • packetstormsecurity.comfiles/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.htmlx_refsource_MISC, Third-party advisory, Vulnerability database
    • security.netapp.comadvisory/ntap-20191031-0005x_refsource_CONFIRM, Third-party advisory
    • seclists.org20191108 [slackware-security] Slackware 14.2 kernel (SSA:2019-311-01)Mailing list, x_refsource_BUGTRAQ, Mailing list, Patch, Third-party advisory
    • packetstormsecurity.comfiles/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-…x_refsource_MISC, Third-party advisory, Vulnerability database
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