CVE-2025-38704: rcu/nocb: Fix possible invalid rdp's->nocb_cb_kthread pointer access
CSIRTS triage
- What
- An invalid pointer access to nocb_cb_kthread in the RCU no-callback subsystem can cause crashes or memory corruption.
- Who is affected
- Systems with RCU no-callback mode enabled in the kernel are affected.
- Urgency
- Medium severity (CVSS 6.3); can cause system instability and requires kernel update.
- Action
- Update the kernel to include the RCU nocb pointer validation fix.
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-2025-38704
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-2025-387040.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-38704 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[UPDATE] [high] Linux Kernel: Multiple vulnerabilities allow Denial of Servicecert-bund
- unknownexploitedSiemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFPcisa
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