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CVE-2026-98808 Linux CVE debrief

A buffer overflow vulnerability was found in the Linux kernel's bcm_sysport_get_stats() function. The issue arises when running on SYSTEMPORT Lite, where certain statistics are unsupported and skipped. The variable 'j' tracks the compacted index into the destination data buffer, while 'i' iterates over all elements in bcm_sysport_gstrings_stats. Writing to data[i] instead of data[j] can lead to memory corruption. The fix involves writing to data[j] instead of data[i].

Vendor
Linux
Product
Unknown
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-18
Original CVE updated
2026-10-21
Advisory published
2026-10-18
Advisory updated
2026-10-21

Who should care

Linux system administrators and security teams should be aware of this vulnerability and take necessary actions to prevent potential memory corruption. They should prioritize verifying the integrity of their Linux kernel versions and applying necessary patches. Additionally, they should review system configurations to prevent potential memory corruption and monitor system logs for suspicious activity. Security teams should also consider implementingcompens

Why it matters

Linux system administrators and security teams should prioritize verifying the integrity of their Linux kernel versions and applying the necessary patches to prevent potential memory corruption.

  • Memory corruption can lead to system crashes or unexpected behavior
  • Potential for denial-of-service (DoS) attacks
  • Possible data corruption or loss

Technical summary

The buffer overflow vulnerability in the Linux kernel's bcm_sysport_get_stats() function occurs when running on SYSTEMPORT Lite. The issue arises from writing to the wrong index in the destination data buffer, leading to memory corruption. The fix involves writing to the correct index. This vulnerability can be mitigated by verifying the integrity of Linux kernel versions and applying necessary patches. Affected system administrators and security teams should prioritize patching to prevent potential memory corruption and system crashes.

Defensive priority

Linux system administrators and security teams should prioritize verifying the integrity of their Linux kernel versions and applying the necessary patches to prevent potential memory corruption.

Recommended defensive actions

  • Verify Linux kernel versions and apply necessary patches
  • Review system configurations to prevent potential memory corruption
  • Monitor system logs for suspicious activity
  • Perform vulnerability scanning to identify exposed systems
  • Implement compensating controls for exposed systems
  • Track exceptions and retest remediated assets
  • Review and update asset inventory for affected products

Evidence notes

The CVE record and source item provide details about the buffer overflow vulnerability in the Linux kernel's bcm_sysport_get_stats() function. The issue is caused by writing to the wrong index in the destination data buffer, leading to memory corruption.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-98808 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-98808

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

  • CVE-2026-98808 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-98808

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

Supplemental references

  • net: systemport: Fix buffer overflow in bcm_sysport_get_stats()

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/98xxx/CVE-2026-98808.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/96a2b042051553df0d9f03b518dd3b7105b36935

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/29d1d35ad5ad379a904263ea1cd4ba1d71cd965f

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/96d8b26be5bc451188acdcee055948da45adbde0

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/faba9fdde480356f4a1d3b1a5713b7b354858a1c

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://git.kernel.org/stable/c/eb7b84af0ec5c71b4920e999611b466b3784496c

    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.