CVE-2026-23353

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ice: fix crash in ethtool offline loopback test<br /> <br /> Since the conversion of ice to page pool, the ethtool loopback test<br /> crashes:<br /> <br /> BUG: kernel NULL pointer dereference, address: 000000000000000c<br /> #PF: supervisor write access in kernel mode<br /> #PF: error_code(0x0002) - not-present page<br /> PGD 1100f1067 P4D 0<br /> Oops: Oops: 0002 [#1] SMP NOPTI<br /> CPU: 23 UID: 0 PID: 5904 Comm: ethtool Kdump: loaded Not tainted 6.19.0-0.rc7.260128g1f97d9dcf5364.49.eln154.x86_64 #1 PREEMPT(lazy)<br /> Hardware name: [...]<br /> RIP: 0010:ice_alloc_rx_bufs+0x1cd/0x310 [ice]<br /> Code: 83 6c 24 30 01 66 41 89 47 08 0f 84 c0 00 00 00 41 0f b7 dc 48 8b 44 24 18 48 c1 e3 04 41 bb 00 10 00 00 48 8d 2c 18 8b 04 24 45 0c 41 8b 4d 00 49 d3 e3 44 3b 5c 24 24 0f 83 ac fe ff ff 44<br /> RSP: 0018:ff7894738aa1f768 EFLAGS: 00010246<br /> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000<br /> RDX: 0000000000000000 RSI: 0000000000000700 RDI: 0000000000000000<br /> RBP: 0000000000000000 R08: ff16dcae79880200 R09: 0000000000000019<br /> R10: 0000000000000001 R11: 0000000000001000 R12: 0000000000000000<br /> R13: 0000000000000000 R14: 0000000000000000 R15: ff16dcae6c670000<br /> FS: 00007fcf428850c0(0000) GS:ff16dcb149710000(0000) knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: 000000000000000c CR3: 0000000121227005 CR4: 0000000000773ef0<br /> PKRU: 55555554<br /> Call Trace:<br /> <br /> ice_vsi_cfg_rxq+0xca/0x460 [ice]<br /> ice_vsi_cfg_rxqs+0x54/0x70 [ice]<br /> ice_loopback_test+0xa9/0x520 [ice]<br /> ice_self_test+0x1b9/0x280 [ice]<br /> ethtool_self_test+0xe5/0x200<br /> __dev_ethtool+0x1106/0x1a90<br /> dev_ethtool+0xbe/0x1a0<br /> dev_ioctl+0x258/0x4c0<br /> sock_do_ioctl+0xe3/0x130<br /> __x64_sys_ioctl+0xb9/0x100<br /> do_syscall_64+0x7c/0x700<br /> entry_SYSCALL_64_after_hwframe+0x76/0x7e<br /> [...]<br /> <br /> It crashes because we have not initialized libeth for the rx ring.<br /> <br /> Fix it by treating ICE_VSI_LB VSIs slightly more like normal PF VSIs and<br /> letting them have a q_vector. It&amp;#39;s just a dummy, because the loopback<br /> test does not use interrupts, but it contains a napi struct that can be<br /> passed to libeth_rx_fq_create() called from ice_vsi_cfg_rxq() -&gt;<br /> ice_rxq_pp_create().