CVE-2025-68362
Vulnerability Description
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.
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.
Vulnerability Details
Published Date
Last Modified
Source
NVD
External 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
- https://git.kernel.org/stable/c/b647d2574e4583c2e3b0ab35568f60c88e910840
- https://git.kernel.org/stable/c/dc153401fb26c1640a2b279c47b65e1c416af276
- https://git.kernel.org/stable/c/e2f3ea15e804607e0a4a34a2f6c331c8750b68bc
Discussion (0)
Add Comment
No comments yet. Be the first!