CVE-2026-74748: netfilter: ipset: fix refcount race between list:set GC and swap
CSIRTS triage
- What
- A refcount race condition exists between list:set garbage collection and swap operations in netfilter ipset.
- Who is affected
- Systems using netfilter ipset list:set type in the Linux kernel.
- Urgency
- Medium severity (CVSS 4.1); unexloited but could lead to use-after-free.
- Action
- Apply kernel patches addressing CVE-2026-74748 when available from your distribution.
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-2026-74748
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-2026-747480.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-74748 | coverage & exploitation status | NVD · CVE.org |
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