HighCVE-2026-46190

    Linux Kernel: Out-of-Bounds Read (CVE-2026-46190)

    Published Last modified Sources: SUSE, Debian LTS, Ubuntu, Siemens ProductCERT, BSI, CVE.org, Msrc Update Guide, EUVD

    Share

    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show() Sashiko noticed an out-of-bounds read [1]. In spi_nor_params_show(), the snor_f_names array is passed to spi_nor_print_flags() using sizeof(snor_f_names).

    Update Linux Kernel to version 6.1.176, Linux Kernel to version 6.6.140, Linux Kernel to version 6.12.88.

    Affected
    • Linux Kernel lt 5.19..6.1.176
    • Linux Kernel lt 6.2..6.6.140
    • Linux Kernel lt 6.7..6.12.88
    • Linux Kernel lt 6.13..6.18.30
    • Linux Kernel lt 6.19..7.0.7
    Fixed in
    • Linux Kernel 6.1.176
    • Linux Kernel 6.6.140
    • Linux Kernel 6.12.88
    • Linux Kernel 6.18.30
    • Linux Kernel 7.0.7
    • Linux Kernel 7.1

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

    Metrics

    7.1

    Priority

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

    Source: Vendor (CNA), CVSS v3

    7.1

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: SUSE, Debian LTS, Ubuntu, Siemens ProductCERT, BSI, CVE.org, Msrc Update Guide, EUVD

    0.1 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 2.7

    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
    53.39 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
    7.1 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
    7.1
    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
    0.1 %
    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
    2.7
    Low — this CVE sits in the lower 10% of all CVEs scored today.
    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

    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

    In the Linux kernel, the following vulnerability has been resolved: mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show() Sashiko noticed an out-of-bounds read [1]. In spi_nor_params_show(), the snor_f_names array is passed to spi_nor_print_flags() using sizeof(snor_f_names). Since snor_f_names is an array of pointers, sizeof() returns the total number of bytes occupied by the pointers (element_count * sizeof(void *)) rather than the element count itself. On 64-bit systems, this makes the passed length 8x larger than intended. Inside spi_nor_print_flags(), the 'names_len' argument is used to bounds-check the 'names' array access. An out-of-bounds read occurs if a flag bit is set that exceeds the array's actual element count but is within the inflated byte-size count. Correct this by using ARRAY_SIZE() to pass the actual number of string pointers in the array.

    Source: suse_csaf, Debian LTS Advisories, Ubuntu Security Notices, siemens_advisory, BSI WID Portal, BSI CSAF, cvelistv5, NVD (NIST), Microsoft Security Update Guide, ENISA EUVD, CVE.org (MITRE)

    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
    LinuxLinux
    • 6.7 – < 6.12.88
    • 6.2 – < 6.6.140
    • 5.19 – < 6.1.176
    • 6.19 – < 7.0.7
    • —
    • 6.13 – < 6.18.30
    • 6.12.88
    • 6.6.140
    • 6.1.176
    • 7.0.7
    • 7.1
    • 6.18.30
    SiemensSIMATIC S7
    • 1500 TM MFP V1.1.1 GNU/Linux subsystem
    • —

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianlinuxbookworm
    Linuxdebianlinux-6.1bullseye
    Linuxubuntulinux-oracle-7.0noble
    Linuxlinuxlinux_kernel7.1
    Linuxlinuxlinux_kernel—

    References & sources

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedLinux

      Show 17 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5
      Referenceadded
      —
      https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162
      Referenceadded
      —
      https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524
      Referenceadded
      —
      https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310
      Referenceadded
      —
      https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7
      Referenceadded
      —
      https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147
      Referenceremoved
      https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5
      —
      Referenceremoved
      https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162
      —
      Referenceremoved
      https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524
      —
      Referenceremoved
      https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310
      —
      Referenceremoved
      https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7
      —
      Referenceremoved
      https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147 Types: Patch
      —

      Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    2. Record modifiedSiemens ADP

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/46xxx/CVE-2026-46190.json">CVE-2026-46190</a>
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-784472.html

      Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

    3. Record modifiedLinux

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5
      Affected versions (publisher)changed
      Linux, Linux
      Linux, Linux

      Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    4. Initial analysis by NVDNVD

      Newly listed as affected:
      • Linux Kernel (6.13 – before 6.18.30; 6.19 – before 7.0.7; 6.7 – before 6.12.88; 5.19 – before 6.6.140; 1 individual version)

      Weakness type: CWE-125

      Show 7 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Weakness type (CWE)added
      —
      CWE-125
      Product configurationadded
      —
      OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.30 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.7 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.88 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.19 up to (excluding) 6.6.140
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147 Types: Patch

      Source identifier: nvd@nist.gov

    Embed badge

    Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.

    Badge preview for CVE-2026-46190
    <a href="https://intel.neosec.eu/en/cve/CVE-2026-46190"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-46190.svg?lang=en" alt="CVE-2026-46190 – NEOSEC Intel" height="20"></a>