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        {
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nveth: ensure skb entering GRO are not cloned.\n\nAfter commit d3256efd8e8b (\"veth: allow enabling NAPI even without XDP\"),\nif GRO is enabled on a veth device and TSO is disabled on the peer\ndevice, TCP skbs will go through the NAPI callback. If there is no XDP\nprogram attached, the veth code does not perform any share check, and\nshared/cloned skbs could enter the GRO engine.\n\nIgnat reported a BUG triggered later-on due to the above condition:\n\n[   53.970529][    C1] kernel BUG at net/core/skbuff.c:3574!\n[   53.981755][    C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\n[   53.982634][    C1] CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.16.0-rc5+ #25\n[   53.982634][    C1] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n[   53.982634][    C1] RIP: 0010:skb_shift+0x13ef/0x23b0\n[   53.982634][    C1] Code: ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0\n7f 08 84 c0 0f 85 41 0c 00 00 41 80 7f 02 00 4d 8d b5 d0 00 00 00 0f\n85 74 f5 ff ff \u003c0f\u003e 0b 4d 8d 77 20 be 04 00 00 00 4c 89 44 24 78 4c 89\nf7 4c 89 8c\n[   53.982634][    C1] RSP: 0018:ffff8881008f7008 EFLAGS: 00010246\n[   53.982634][    C1] RAX: 0000000000000000 RBX: ffff8881180b4c80 RCX: 0000000000000000\n[   53.982634][    C1] RDX: 0000000000000002 RSI: ffff8881180b4d3c RDI: ffff88810bc9cac2\n[   53.982634][    C1] RBP: ffff8881008f70b8 R08: ffff8881180b4cf4 R09: ffff8881180b4cf0\n[   53.982634][    C1] R10: ffffed1022999e5c R11: 0000000000000002 R12: 0000000000000590\n[   53.982634][    C1] R13: ffff88810f940c80 R14: ffff88810f940d50 R15: ffff88810bc9cac0\n[   53.982634][    C1] FS:  0000000000000000(0000) GS:ffff888235880000(0000) knlGS:0000000000000000\n[   53.982634][    C1] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[   53.982634][    C1] CR2: 00007ff5f9b86680 CR3: 0000000108ce8004 CR4: 0000000000170ee0\n[   53.982634][    C1] Call Trace:\n[   53.982634][    C1]  \u003cTASK\u003e\n[   53.982634][    C1]  tcp_sacktag_walk+0xaba/0x18e0\n[   53.982634][    C1]  tcp_sacktag_write_queue+0xe7b/0x3460\n[   53.982634][    C1]  tcp_ack+0x2666/0x54b0\n[   53.982634][    C1]  tcp_rcv_established+0x4d9/0x20f0\n[   53.982634][    C1]  tcp_v4_do_rcv+0x551/0x810\n[   53.982634][    C1]  tcp_v4_rcv+0x22ed/0x2ed0\n[   53.982634][    C1]  ip_protocol_deliver_rcu+0x96/0xaf0\n[   53.982634][    C1]  ip_local_deliver_finish+0x1e0/0x2f0\n[   53.982634][    C1]  ip_sublist_rcv_finish+0x211/0x440\n[   53.982634][    C1]  ip_list_rcv_finish.constprop.0+0x424/0x660\n[   53.982634][    C1]  ip_list_rcv+0x2c8/0x410\n[   53.982634][    C1]  __netif_receive_skb_list_core+0x65c/0x910\n[   53.982634][    C1]  netif_receive_skb_list_internal+0x5f9/0xcb0\n[   53.982634][    C1]  napi_complete_done+0x188/0x6e0\n[   53.982634][    C1]  gro_cell_poll+0x10c/0x1d0\n[   53.982634][    C1]  __napi_poll+0xa1/0x530\n[   53.982634][    C1]  net_rx_action+0x567/0x1270\n[   53.982634][    C1]  __do_softirq+0x28a/0x9ba\n[   53.982634][    C1]  run_ksoftirqd+0x32/0x60\n[   53.982634][    C1]  smpboot_thread_fn+0x559/0x8c0\n[   53.982634][    C1]  kthread+0x3b9/0x490\n[   53.982634][    C1]  ret_from_fork+0x22/0x30\n[   53.982634][    C1]  \u003c/TASK\u003e\n\nAddress the issue by skipping the GRO stage for shared or cloned skbs.\nTo reduce the chance of OoO, try to unclone the skbs before giving up.\n\nv1 -\u003e v2:\n - use avoid skb_copy and fallback to netif_receive_skb  - Eric"
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      "metrics": [
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            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "value": "AV:L - The bug is in the veth virtual-device TX/RX path and is triggered by locally originated TCP skbs crossing a veth pair (typically clones from tcp_transmit_skb), not by unauthenticated remote packets on a network-facing protocol.\nAC:L - An attacker who can create/configure a veth pair fully controls GRO-on/TSO-off and both ends of the TCP connection, so cloned skbs reliably enter GRO and the failure can be provoked without relying on external timing or layout.\nPR:L - Creating veth devices and toggling GRO/TSO requires only CAP_NET_ADMIN in the owning user_ns, which an unprivileged process obtains via user namespaces (unshare -Urn), so privileges are Low rather than real host root.\nUI:N - No victim action is required; the attacker configures the interfaces and generates the TCP traffic that hits the vulnerable path.\nS:U - Impact stays within the host kernel\u2019s authority (crash/memory corruption of sk_buff state); this is not a VM, IOMMU, or other cross-boundary escape.\nC:H - GRO coalescing mutates shared skb_shinfo/frags of cloned skbs, corrupting the peer clone still on the TCP retransmit queue and enabling use-after-free or disclosure of page-backed packet data.\nI:H - The same shared-frag corruption can break page ownership (stolen/zeroed nr_frags, merge-path frag edits), yielding double-free or attacker-influenced writes consistent with heap memory-corruption primitives.\nA:H - The reported outcome is an unconditional kernel BUG_ON in skb_shift during TCP SACK processing, which oopses/panics the host."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: scsi_debug: Fix type in min_t to avoid stack OOB\n\nChange min_t() to use type \"u32\" instead of type \"int\" to avoid stack out\nof bounds. With min_t() type \"int\" the values get sign extended and the\nlarger value gets used causing stack out of bounds.\n\nBUG: KASAN: stack-out-of-bounds in memcpy include/linux/fortify-string.h:191 [inline]\nBUG: KASAN: stack-out-of-bounds in sg_copy_buffer+0x1de/0x240 lib/scatterlist.c:976\nRead of size 127 at addr ffff888072607128 by task syz-executor.7/18707\n\nCPU: 1 PID: 18707 Comm: syz-executor.7 Not tainted 5.15.0-syzk #1\nHardware name: Red Hat KVM, BIOS 1.13.0-2\nCall Trace:\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x89/0xb5 lib/dump_stack.c:106\n print_address_description.constprop.9+0x28/0x160 mm/kasan/report.c:256\n __kasan_report mm/kasan/report.c:442 [inline]\n kasan_report.cold.14+0x7d/0x117 mm/kasan/report.c:459\n check_region_inline mm/kasan/generic.c:183 [inline]\n kasan_check_range+0x1a3/0x210 mm/kasan/generic.c:189\n memcpy+0x23/0x60 mm/kasan/shadow.c:65\n memcpy include/linux/fortify-string.h:191 [inline]\n sg_copy_buffer+0x1de/0x240 lib/scatterlist.c:976\n sg_copy_from_buffer+0x33/0x40 lib/scatterlist.c:1000\n fill_from_dev_buffer.part.34+0x82/0x130 drivers/scsi/scsi_debug.c:1162\n fill_from_dev_buffer drivers/scsi/scsi_debug.c:1888 [inline]\n resp_readcap16+0x365/0x3b0 drivers/scsi/scsi_debug.c:1887\n schedule_resp+0x4d8/0x1a70 drivers/scsi/scsi_debug.c:5478\n scsi_debug_queuecommand+0x8c9/0x1ec0 drivers/scsi/scsi_debug.c:7533\n scsi_dispatch_cmd drivers/scsi/scsi_lib.c:1520 [inline]\n scsi_queue_rq+0x16b0/0x2d40 drivers/scsi/scsi_lib.c:1699\n blk_mq_dispatch_rq_list+0xb9b/0x2700 block/blk-mq.c:1639\n __blk_mq_sched_dispatch_requests+0x28f/0x590 block/blk-mq-sched.c:325\n blk_mq_sched_dispatch_requests+0x105/0x190 block/blk-mq-sched.c:358\n __blk_mq_run_hw_queue+0xe5/0x150 block/blk-mq.c:1761\n __blk_mq_delay_run_hw_queue+0x4f8/0x5c0 block/blk-mq.c:1838\n blk_mq_run_hw_queue+0x18d/0x350 block/blk-mq.c:1891\n blk_mq_sched_insert_request+0x3db/0x4e0 block/blk-mq-sched.c:474\n blk_execute_rq_nowait+0x16b/0x1c0 block/blk-exec.c:62\n sg_common_write.isra.18+0xeb3/0x2000 drivers/scsi/sg.c:836\n sg_new_write.isra.19+0x570/0x8c0 drivers/scsi/sg.c:774\n sg_ioctl_common+0x14d6/0x2710 drivers/scsi/sg.c:939\n sg_ioctl+0xa2/0x180 drivers/scsi/sg.c:1165\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:874 [inline]\n __se_sys_ioctl fs/ioctl.c:860 [inline]\n __x64_sys_ioctl+0x19d/0x220 fs/ioctl.c:860\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3a/0x80 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x44/0xae"
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          "url": "https://git.kernel.org/stable/c/36e07d7ede88a1f1ef8f0f209af5b7612324ac2c"
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      "title": "scsi: scsi_debug: Fix type in min_t to avoid stack OOB",
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        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2022-1016"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2022-1016",
    "datePublished": "2022-08-29T14:03:06.000Z",
    "dateReserved": "2022-03-17T00:00:00.000Z",
    "dateUpdated": "2024-08-02T23:47:42.700Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}