DEBIAN-CVE-2026-63912

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 espoutputhead() before espoutputtail() allocates the destination page frag. The head-side gate currently checks skb->datalen and tailen separately, but the tail code allocates a single destination frag from the combined post-trailer skb->datalen.  Reject the page-frag fast path when the combined aligned length exceeds a page. Otherwise skbpagefragrefill() may fall back to a single page while the destination sg still spans the combined skb->datalen.  Restore this combined-length page gate for both IPv4 and IPv6.