CVE-2025-68362

In the Linux kernel, the following vulnerability has been resolved: wifi: rtl818x: rtl8187: Fix potential buffer underflow in rtl8187_rx_cb() The rtl8187_rx_cb() calculates the rx descriptor header address by subtracting its size from the skb tail pointer. However, it does not validate if the received packet (skb->len from urb->actual_length) is large enough to contain this header. If a truncated packet is received, this will lead to a buffer underflow, reading memory before the start of the skb data area, and causing a kernel panic. Add length checks for both rtl8187 and rtl8187b descriptor headers before attempting to access them, dropping the packet cleanly if the check fails.

EPSS

0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-25)

Published

2025-12-24

Modified

2026-10-13

Record from

the NVD, synced 2026-10-19

References

• https://git.kernel.org/stable/c/118e12bf3e4288cf845cd3759bd9d4c99f91aab5
• https://git.kernel.org/stable/c/4758770a673c60d8f615809304d72e1432fa6355
• https://git.kernel.org/stable/c/5ebf0fe7eaef9f6173a4c6ea77c5353e21645d15
• https://git.kernel.org/stable/c/638d4148e166d114a4cd7becaae992ce1a815ed8
• https://git.kernel.org/stable/c/6a96bd0d94305fd04a6ac64446ec113bae289384

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