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CVE-2026-98419 Linux CVE debrief

A PatchSiren debrief of CVE-2026-98419, a vulnerability in the Linux kernel's drop_monitor component. This vulnerability allows for an out-of-bounds write in the reset_per_cpu_data() function. Linux system administrators and security teams should verify Linux kernel versions to determine exposure and apply patches or updates to fixed versions to prevent vulnerability exploitation. The vulnerability has been resolved in various kernel commits. Affected product deployments should be confirmed in managed environments and assigned an owner for follow-up. The official advisory or CVE record should be reviewed to validate affected scope, severity, and vendor guidance.

Vendor
Linux
Product
Unknown
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-14
Original CVE updated
2026-10-14
Advisory published
2026-10-14
Advisory updated
2026-10-14

Who should care

Linux system administrators and security teams should verify Linux kernel versions to determine exposure and apply patches or updates to fixed versions to prevent vulnerability exploitation. Affected operators, platforms, vulnerability-management, and security teams should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Why it matters

CVE-2026-98419 is a vulnerability in the Linux kernel's drop_monitor component that allows for an out-of-bounds write in the reset_per_cpu_data() function. Linux system administrators and security teams should verify Linux kernel versions to determine exposure and apply patches or updates to fixed versions to prevent vulnerability exploitation.

  • Verify Linux kernel version to determine exposure
  • Apply patch or update to fixed version to prevent vulnerability exploitation
  • Inventory Linux systems for exposure

Technical summary

The Linux kernel's drop_monitor component has a vulnerability that allows for an out-of-bounds write in the reset_per_cpu_data() function. This vulnerability has been resolved in various kernel commits. The vulnerability is caused by an incorrect calculation of the allocation size for the skb buffer, which can lead to a buffer overflow. The affected product context is the Linux kernel's drop_monitor component. The defensive impact is that Linux system administrators and security teams should verify Linux kernel versions to determine exposure and apply patches or updates to fixed versions to prevent vulnerability exploitation.

Defensive priority

Apply patch or update to fixed version

Recommended defensive actions

  • Apply patch or update to fixed version
  • Inventory Linux systems for exposure
  • Verify Linux kernel version
  • Review compensating controls for exposed systems
  • Check relevant monitoring, detection, and logs for exposed assets
  • Track exceptions, retest remediated assets
  • Confirm whether affected product deployments exist in managed environments

Evidence notes

The Linux kernel's drop_monitor component has a vulnerability that allows for an out-of-bounds write in the reset_per_cpu_data() function. This vulnerability has been resolved in various kernel commits. The source grounding indicates that the vulnerability is in the Linux kernel's drop_monitor component. The evidence limits are based on the provided source corpus. Defenders should verify Linux kernel versions to determine exposure and apply patches or updates to fixed versions to prevent vulnerability exploitation. The CVE record was

Sources and references

Verified primary and authoritative sources

  • CVE-2026-98419 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-98419

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

  • CVE-2026-98419 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-98419

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

Supplemental references

  • drop_monitor: fix out-of-bounds write in reset_per_cpu_data()

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/98xxx/CVE-2026-98419.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/caf09c09e0f323015ab6777ed1bad5aa10688631

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/56b12f0cd476e4d90a0e2663a80102b388ebf78c

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/88d640efd655b10f9fa4e381caf777da1f17c2a6

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/d54a044136b129822715e8798899af540ec7a9e9

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/8a04047c6dbff2f49a561b1ff53b043f4807e855

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/530ae0a1458078c7a81fbffd9ff17d42129364d9

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/03b672eba4937ff18337049824a114012d57f202

    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.