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CVE-2026-74374 Linux CVE debrief

A PatchSiren debrief of CVE-2026-74374, a HIGH severity vulnerability in the Linux kernel's md/raid1 and raid10 components. This vulnerability can lead to deadlocks under memory pressure due to incorrect usage of GFP_NOIO instead of (GFP_NOIO | __GFP_HIGH). Linux system administrators, security teams, and developers should assess exposure, verify patch deployment, and monitor for potential impacts. The vulnerability affects Linux kernel versions and requires verification of patch deployment to ensure vulnerability mitigation.

Vendor
Linux
Product
Unknown
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-15
Original CVE updated
2026-10-16
Advisory published
2026-08-15
Advisory updated
2026-10-16

Who should care

Linux system administrators, security teams, and developers responsible for maintaining and securing Linux-based systems should assess exposure, verify patch deployment, and monitor for potential impacts. The vulnerability affects Linux kernel versions and requires verification of patch deployment to ensure vulnerability mitigation.

Why it matters

CVE-2026-74374 is a HIGH severity vulnerability in the Linux kernel's md/raid1 and raid10 components that can lead to deadlocks under memory pressure. Linux system administrators, security teams, and developers should assess exposure, verify patch deployment, and monitor for potential impacts.

  • Memory pressure could lead to deadlocks, impacting system availability.
  • Verification of patch deployment is necessary to ensure vulnerability mitigation.
  • Exposure assessment is required for Linux kernel versions to determine potential impact.

Technical summary

The Linux kernel's md/raid1 and raid10 components have a vulnerability that can lead to a deadlock under memory pressure due to incorrect usage of GFP_NOIO instead of (GFP_NOIO | __GFP_HIGH). The vulnerability affects Linux kernel versions and requires verification of patch deployment to ensure vulnerability mitigation. The vulnerability has a HIGH severity score of 7.5 and is related to the Linux kernel's handling of memory pressure. The source code changes are referenced in the CVE record and source item. The vulnerability can be mitigated by verifying patch deployment and monitoring for potential memory pressure impacts.

Defensive priority

Assess Linux kernel versions for exposure, verify patch deployment, and monitor for potential memory pressure impacts.

Recommended defensive actions

  • Assess Linux kernel versions for exposure
  • Verify patch deployment
  • Monitor for potential memory pressure impacts
  • Review compensating controls for exposed systems
  • Check relevant monitoring, detection, and logs for exposed assets
  • Track exceptions, retest remediated assets
  • Plan vendor-supported updates or mitigations through normal change control

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, affected versions, and references to source code changes. The Linux kernel's md/raid1 and raid10 components have a vulnerability that can lead to a deadlock under memory pressure. The source code changes are referenced in the CVE record and source item. The vulnerability has a HIGH severity score of 7.5 and is related to the Linux kernel's handling of memory pressure.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-74374 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-74374

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

  • CVE-2026-74374 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-74374

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

Supplemental references

  • md/raid1,raid10: fix error-path detection with md_cloned_bio()

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/74xxx/CVE-2026-74374.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/029b363c9b690613141338436ac91366b1928af2

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/20fb582c92fd64e5c8bd83c6176264b2794603b7

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/811545e0926d02a6a0b1a1258bb5544777c164d4

    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.