CVE-2026-68169: mptcp: pm: userspace: fix use-after-free in get_local_id
CSIRTS triage
- What
- Use-after-free vulnerability in MPTCP path manager userspace handling when retrieving local IDs.
- Who is affected
- Systems running affected Linux kernel versions with MPTCP enabled.
- Urgency
- Medium priority; not currently exploited but memory corruption could lead to denial of service or code execution.
- Action
- Apply kernel security patch when available from your Linux 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-2026-68169
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-2026-681690.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-68169 | coverage & exploitation status | NVD · CVE.org |
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