MediumCVE-2026-46167

    Linux Kernel: security vulnerability (CVE-2026-46167)

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

    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: usb: usblp: fix uninitialized heap leak via LPGETSTATUS ioctl Just like in a previous problem in this driver, usblp_ctrl_msg() will collapse the usb_control_msg() return value to 0/-errno, discarding the actual number of bytes transferred. Ideally that short command should be detected and error out, but many printers are known to send "incorrect" responses back so we can't just do that. statusbuf is kmalloc(8) at probe time and never filled before the first LPGETSTATUS ioctl. usblp_read_status() requests 1 byte.

    Update Linux Kernel to version 5.10.258, Linux Kernel to version 5.15.209, Linux Kernel to version 6.1.175.

    Affected
    • Linux Kernel lt 2.6.12..5.10.258
    • Linux Kernel lt 5.11..5.15.209
    • Linux Kernel lt 5.16..6.1.175
    • 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 5.10.258
    • Linux Kernel 5.15.209
    • Linux Kernel 6.1.175
    • 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

    5.5

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

    0.1 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 2.7

    Show all metrics
    Severity
    Medium
    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
    45.58 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
    5.5 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
    0.1 %
    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
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    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: usb: usblp: fix uninitialized heap leak via LPGETSTATUS ioctl Just like in a previous problem in this driver, usblp_ctrl_msg() will collapse the usb_control_msg() return value to 0/-errno, discarding the actual number of bytes transferred. Ideally that short command should be detected and error out, but many printers are known to send "incorrect" responses back so we can't just do that. statusbuf is kmalloc(8) at probe time and never filled before the first LPGETSTATUS ioctl. usblp_read_status() requests 1 byte. If a malicious printer responds with zero bytes, *statusbuf is one byte of stale kmalloc heap, sign-extended into the local int status, which the LPGETSTATUS path then copy_to_user()s directly to the ioctl caller. Fix this all by just zapping out the memory buffer when allocated at probe time. If a later call does a short read, the data will be identical to what the device sent it the last time, so there is no "leak" of information happening.

    Source: suse_csaf, Debian LTS Advisories, Ubuntu Security Notices, siemens_advisory, BSI WID Portal, BSI CSAF, ENISA EUVD, cvelistv5, NVD (NIST), Microsoft Security Update Guide, 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
    • 5.16 – < 6.1.175
    • 6.7 – < 6.12.88
    • 6.2 – < 6.6.140
    • 6.19 – < 7.0.7
    • 5.11 – < 5.15.209
    • 2.6.12 – < 5.10.258
    • —
    • 6.13 – < 6.18.30
    • 6.1.175
    • 6.12.88
    • 6.6.140
    • 7.0.7
    • 5.15.209
    • 5.10.258
    • 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
    Linuxdebianlinuxbullseye
    Linuxdebianlinux-6.1bullseye
    Linuxubuntulinux-oracle-7.0noble
    Linuxlinuxlinux_kernel2.6.12
    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 24 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/087d97342c100138ea7d75a50977c9c2319f957b
      Referenceadded
      —
      https://git.kernel.org/stable/c/0f7c41314ebf17049917a452684db371babf711a
      Referenceadded
      —
      https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba
      Referenceadded
      —
      https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f
      Referenceadded
      —
      https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2
      Referenceadded
      —
      https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5
      Referenceadded
      —
      https://git.kernel.org/stable/c/cf24991619be317e2769310b4a367bf4a04b82bc
      Referenceadded
      —
      https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a
      Referenceremoved
      https://git.kernel.org/stable/c/087d97342c100138ea7d75a50977c9c2319f957b
      —
      Referenceremoved
      https://git.kernel.org/stable/c/0f7c41314ebf17049917a452684db371babf711a
      —
      Referenceremoved
      https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba
      —
      Referenceremoved
      https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f
      —
      Referenceremoved
      https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2
      —
      Referenceremoved
      https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5
      —
      Referenceremoved
      https://git.kernel.org/stable/c/cf24991619be317e2769310b4a367bf4a04b82bc
      —
      Referenceremoved
      https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/087d97342c100138ea7d75a50977c9c2319f957b Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/0f7c41314ebf17049917a452684db371babf711a Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/cf24991619be317e2769310b4a367bf4a04b82bc Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a 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-2026-46167.json">CVE-2026-46167</a>
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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

    3. Initial analysis by NVDNVD

      Newly listed as affected:
      • Linux Kernel (6.13 – before 6.18.30; 5.16 – before 6.1.175; 5.11 – before 5.15.209; 6.19 – before 7.0.7; 6.7 – before 6.12.88; 6.2 – before 6.6.140; 2.6.12.1 – before 5.10.258; 7 individual versions)

      CVSS V3.1: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

      Weakness type: CWE-908

      Show 11 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      CVSSadded
      —
      AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
      Weakness type (CWE)added
      —
      CWE-908
      Product configurationadded
      —
      OR *cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *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) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *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) 6.2 up to (excluding) 6.6.140 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.12.1 up to (excluding) 5.10.258
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/087d97342c100138ea7d75a50977c9c2319f957b Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/0f7c41314ebf17049917a452684db371babf711a Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/6b0e7438e31c74b01514d31ff35c1e688c4baaba Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/762a6ccf391db0d629e590a803a3a2231e17dd3f Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/a502b997668401a6821501fc98b7f9220f9b6ff2 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/b38e53cbfb9d84732e5984fbd73e128d592415c5 Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/cf24991619be317e2769310b4a367bf4a04b82bc Types: Patch
      Reference typeadded
      —
      kernel.org: https://git.kernel.org/stable/c/d06d937b0a4cdb8867f04275c8100a8b943da31a Types: Patch

      Source identifier: nvd@nist.gov

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