CVE-2026-98803Medium· 6.5▾ SunlitA flaw was found in the Linux kernel's stmmac ethernet driver. When receiving network frames larger than the primary buffer size, the Direct Memory Access (DMA) engine attempts to write excess data into a secondary receive buffer that is n…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
Last analysed / modified upstream
— → 6.5
none → medium
A flaw was found in the Linux kernel's stmmac ethernet driver. When receiving network frames larger than the primary buffer size, the Direct Memory Access (DMA) engine attempts to write excess data into a secondary receive buffer that is neither allocated nor mapped for regular frames. An attacker on the local network could send oversized packets to cause a memory translation fault, leading to a system crash and Denial of Service (DoS).
kernel: net: stmmac: fix rx Scatter-Gather support — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.
Not affected:
Refer to the advisory for fix availability.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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