CVE-2026-72393

In the Linux kernel, the following vulnerability has been resolved:

eth: fbnic: don't cache shinfo across skb realloc

fbnic_tx_lso() calls skb_cow_head() which may reallocate the skb
including the shared info. We can't use the pointer calculated
before the call.

    BUG: KASAN: slab-use-after-free in fbnic_tx_lso.isra.0+0x668/0x8e0
    Read of size 4 at addr ff110000262edd98 by task swapper/5/0
    Call Trace:
     fbnic_tx_lso.isra.0+0x668/0x8e0
     fbnic_xmit_frame+0x622/0xba0
     dev_hard_start_xmit+0xf4/0x620

    Allocated by task 8653:
     __alloc_skb+0x11e/0x5f0
     alloc_skb_with_frags+0xcc/0x6c0
     sock_alloc_send_pskb+0x327/0x3f0
     __ip_append_data+0x188b/0x47a0
     ip_make_skb+0x24a/0x300
     udp_sendmsg+0x14d2/0x21e0

    Freed by task 0:
     kfree+0x123/0x5a0
     pskb_expand_head+0x36c/0xfa0
     fbnic_tx_lso.isra.0+0x500/0x8e0
     fbnic_xmit_frame+0x622/0xba0
     dev_hard_start_xmit+0xf4/0x620
     sch_direct_xmit+0x25b/0x1100

    The buggy address belongs to the object at ff110000262edc40
     which belongs to the cache skbuff_small_head of size 640
    The buggy address is located 344 bytes inside of
     freed 640-byte region [ff110000262edc40, ff110000262ede