CVE-2026-43101: ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()
CSIRTS triage
- What
- Potential NULL pointer dereferences in the IOAM6 IPv6 trace data function.
- Who is affected
- Linux systems with IPv6 IOAM (In-Situ Operations, Administration, and Maintenance) enabled.
- Urgency
- High severity; NULL pointer dereferences can cause kernel crashes and denial of service.
- Action
- Apply kernel patch fixing NULL dereference checks in __ioam6_fill_trace_data().
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43101
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-431010.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-43101 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- medium[UPDATE] [medium] Linux Kernel: Multiple Vulnerabilitiescert-bund
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