CVE-2026-74653: serial: 8250_of: clear stuck empty-FIFO RX-timeout on LPC32xx
CSIRTS triage
- What
- Stuck empty-FIFO RX-timeout condition in serial 8250_of driver on LPC32xx platforms causes denial of service.
- Who is affected
- Systems running Linux kernel on LPC32xx hardware with 8250_of serial driver.
- Urgency
- Medium severity (CVSS 5.5) denial of service; not currently exploited.
- Action
- Update to patched Linux kernel version containing the 8250_of LPC32xx RX-timeout 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-2026-74653
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-2026-746530.17% 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-2026-74653 | coverage & exploitation status | NVD · CVE.org |
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