HighCVE-2026-46333

    Linux Kernel: security vulnerability (CVE-2026-46333)

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

    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer.

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

    Conflicting version data — version display is hidden until the data is resolved.

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

    4.3 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 91.1

    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
    119.42 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
    7.1 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
    4.3 %
    Moderate — model estimates 1-10% 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
    91.1
    Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
    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: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional "drop capabilities" model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached "last dumpability" flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override.

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

    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
    • 4.8.16 – < 4.9
    • 4.4.40 – < 4.5
    • 4.10 – < 5.10.256
    • 5.16 – < 6.1.173
    • 5.11 – < 5.15.207
    • 6.19 – < 7.0.8
    • 4.9.1 – < 4.10
    • 3.16.52 – < 3.17
    • 6.2 – < 6.6.139
    • —
    • 6.13 – < 6.18.31
    • 6.7 – < 6.12.89
    • 4.9
    • 4.5
    • 5.10.256
    • 6.1.173
    • 5.15.207
    • 7.0.8
    • 4.10
    • 3.17
    • 6.6.139
    • 7.1
    • 6.18.31
    • 6.12.89
    IBMDataPower Gateway
    • < 11.0.0.3
    • < 10.6.0.11
    • < 10.5.0.23
    • 11.0.0.3
    • 10.6.0.11
    • 10.5.0.23
    Open SourceLinux Kernel
    • < 5.15.207
    • < 6.12.89
    • < 6.6.139
    • < 7.0.8
    • < 6.1.173
    • < 6.18.31
    • < 5.10.256
    • 5.15.207
    • 6.12.89
    • 6.6.139
    • 7.0.8
    • 6.1.173
    • 6.18.31
    • 5.10.256

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebiandebian_linux11.0
    Linuxdebianlinuxbookworm
    Linuxdebianlinuxbullseye
    Linuxdebianlinuxtrixie
    Linuxdebianlinux-6.1bullseye
    Linuxlinuxlinux_kernel7.1
    Linuxlinuxlinux_kernel—

    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 exploitgithub.com (opens in a new tab)PoC (publicly reported)reported, not verified—

    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

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      https://git.kernel.org/stable/c/01363cb3fbd0238ffdeb09f53e9039c9edf8a730
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      https://git.kernel.org/stable/c/15b828a46f305ae9f05a7c16914b3ce273474205
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      https://git.kernel.org/stable/c/2a93a4fac7b6051d3be7cd1b015fe7320cd0404d
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      https://git.kernel.org/stable/c/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a
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      https://git.kernel.org/stable/c/4709234fd1b95136ceb789f639b1e7ea5de1b181
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      https://git.kernel.org/stable/c/8f907d345bae8f4b3f004c5abc56bf2dfb851ea7
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      —

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

    2. Record modifiedCISA ADP

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      https://github.com/0xdeadbeefnetwork/ssh-keysign-pwn/
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      https://github.com/0xdeadbeefnetwork/ssh-keysign-pwn/ Types: Exploit, Third Party Advisory
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      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    3. Record modifiedCVE Program

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      http://www.openwall.com/lists/oss-security/2026/05/15/9
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      http://www.openwall.com/lists/oss-security/2026/05/20/14
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      http://www.openwall.com/lists/oss-security/2026/05/20/16
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      https://lists.debian.org/debian-lts-announce/2026/05/msg00032.html
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      https://lists.debian.org/debian-lts-announce/2026/05/msg00035.html Types: Third Party Advisory
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      Source identifier: af854a3a-2127-422b-91ae-364da2661108

    4. Record modifiedRed Hat ADP

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      https://access.redhat.com/errata/RHSA-2026:33486
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      https://access.redhat.com/security/cve/CVE-2026-46333
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      https://bugzilla.redhat.com/show_bug.cgi?id=2477802
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      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46333.json
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      https://access.redhat.com/errata/RHSA-2026:21702 Types: Third Party Advisory
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      https://access.redhat.com/errata/RHSA-2026:24814 Types: Third Party Advisory
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      https://access.redhat.com/security/cve/CVE-2026-46333 Types: Third Party Advisory
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      https://bugzilla.redhat.com/show_bug.cgi?id=2477802 Types: Third Party Advisory
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      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46333.json Types: Product, Third Party Advisory
      —

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    5. Record modifiedSiemens ADP

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      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/46xxx/CVE-2026-46333.json">CVE-2026-46333</a>
      Referenceadded
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      https://cert-portal.siemens.com/productcert/html/ssa-019113.html
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      https://cert-portal.siemens.com/productcert/html/ssa-457936.html
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      https://cert-portal.siemens.com/productcert/html/ssa-019113.html
      —

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

    Show one older change

    1. Record modifiedRed Hat ADP

      1 individual change: Affected versions (publisher)

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      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)changed
      NVIDIA for RHEL 10, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support (+30)
      NVIDIA for RHEL 10, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support (+30)

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    Linked advisories

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    <a href="https://intel.neosec.eu/en/cve/CVE-2026-46333"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-46333.svg?lang=en" alt="CVE-2026-46333 – NEOSEC Intel" height="20"></a>