CVE-2024-53236: xsk: Free skb when TX metadata options are invalid
Description
In the Linux kernel, the following vulnerability has been resolved:
xsk: Free skb when TX metadata options are invalid
When a new skb is allocated for transmitting an xsk descriptor, i.e., for
every non-multibuf descriptor or the first frag of a multibuf descriptor,
but the descriptor is later found to have invalid options set for the TX
metadata, the new skb is never freed. This can leak skbs until the send
buffer is full which makes sending more packets impossible.
Fix this by freeing the skb in the error path if we are currently dealing
with the first frag, i.e., an skb allocated in this iteration of
xsk_build_skb.
Classification
CVE ID: CVE-2024-53236
Affected Products
Vendor: Linux
Product: Linux
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 17.83% (scored less or equal to compared to others)
EPSS Date: 2025-02-04 (when was this score calculated)
References
https://git.kernel.org/stable/c/7f0d0dd5a7f437d83cff954bc321f1a9b181efd5https://git.kernel.org/stable/c/d5d346deb65efa8453f8481bcea75c1a590439e7
https://git.kernel.org/stable/c/0c0d0f42ffa6ac94cd79893b7ed419c15e1b45de