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…
Impact
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.
Affected packages
This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.
References
- NVD record
- CVE.org record
- 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
- https://git.kernel.org/stable/c/b647d2574e4583c2e3b0ab35568f60c88e910840
- https://git.kernel.org/stable/c/dc153401fb26c1640a2b279c47b65e1c416af276
- https://git.kernel.org/stable/c/e2f3ea15e804607e0a4a34a2f6c331c8750b68bc