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CVE-2024-27056 Linux CVE debrief

The Linux kernel's iwlwifi driver has a vulnerability where the resume code path assumes that the TX queue for the offloading TID has been configured. If no packets have been sent on TID 0, the queue will not have been allocated, causing a crash. This issue can impact systems using the affected Linux kernel versions. The vulnerability can cause crashes if not properly addressed. System administrators and security teams should assess their exposure and apply the fix to prevent potential crashes. The issue is caused by the resume code path assuming that the TX queue for the offloading TID has been configured.

Vendor
Linux
Product
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-14
Original CVE updated
2026-07-28
Advisory published
2026-07-14
Advisory updated
2026-07-28

Who should care

System administrators and security teams responsible for Linux-based systems, especially those using iwlwifi drivers, should assess their exposure and apply the fix to prevent potential crashes.

Why it matters

This vulnerability in the Linux kernel's iwlwifi driver can cause crashes if not properly addressed. System administrators and security teams should assess their exposure and apply the fix to prevent potential crashes.

  • Verify iwlwifi driver configuration to prevent crashes
  • Assess exposure of Linux-based systems using affected kernel versions
  • Apply fix to ensure queue existence at suspend time
  • Review system logs for potential crash indicators

Technical summary

The Linux kernel's iwlwifi driver has a vulnerability where the resume code path assumes that the TX queue for the offloading TID has been configured. If no packets have been sent on TID 0, the queue will not have been allocated, causing a crash. This issue can be addressed by ensuring the queue exists at suspend time. The vulnerability can cause crashes if not properly addressed. System administrators and security teams should assess their exposure and apply the fix to prevent potential crashes. The issue is caused by the resume code path assuming that the TX queue for the offloading TID has been configured.

Defensive priority

Medium priority for systems using affected Linux kernel versions, especially those with iwlwifi drivers.

Recommended defensive actions

  • Review and apply the fix for the iwlwifi driver vulnerability
  • Limit access to the interactive shell of the additional GNU/Linux subsystem to trusted personnel only
  • Only build and run applications from trusted sources
  • Verify iwlwifi driver configuration to prevent crashes
  • Assess exposure of Linux-based systems using affected kernel versions
  • Apply fix to ensure queue existence at suspend time
  • Review system logs for potential crash indicators

Evidence notes

The CVE record and source item provide details about the vulnerability in the Linux kernel's iwlwifi driver. The issue is caused by the resume code path assuming that the TX queue for the offloading TID has been configured. If no packets have been sent on TID 0, the queue will not have been allocated, causing a crash.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-27056 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-27056

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-27056 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-27056

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • CVE-2024-27056

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-209-04.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-019113.json

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-019113.html

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-209-04

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Supplemental source

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.