CyberRota Analysis
AI-GeneratedA critical vulnerability in the Linux kernel affects the xfrm subsystem, specifically in the handling of ESP (Encapsulating Security Payload) packets, which could lead to improper memory allocation and potential data corruption. This flaw allows attackers to exploit the fast path for packet processing, potentially leading to denial of service or arbitrary code execution. Organizations using affected Linux distributions should prioritize patching this vulnerability to safeguard their systems against exploitation.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: restore combined single-frag length gate The ESP out-of-place fast path appends the trailer in esp_output_head() before esp_output_tail() allocates the destination page frag. The head-side gate currently checks skb->data_len and tailen separately, but the tail code allocates a single destination frag from the combined post-trailer skb->data_len. Reject the page-frag fast path when the combined aligned length exceeds a page. Otherwise skb_page_frag_refill() may fall back to a single page while the destination sg still spans the combined skb->data_len. Restore this combined-length page gate for both IPv4 and IPv6.