{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53659",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-10-07T15:16:59.662Z",
        "datePublished": "2025-10-07T15:21:19.619Z",
        "dateUpdated": "2026-08-05T09:15:23.282Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T09:15:23.282Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: Fix out-of-bounds when setting channels on remove\n\nIf we set channels greater during iavf_remove(), and waiting reset done\nwould be timeout, then returned with error but changed num_active_queues\ndirectly, that will lead to OOB like the following logs. Because the\nnum_active_queues is greater than tx/rx_rings[] allocated actually.\n\nReproducer:\n\n  [root@host ~]# cat repro.sh\n  #!/bin/bash\n\n  pf_dbsf=\"0000:41:00.0\"\n  vf0_dbsf=\"0000:41:02.0\"\n  g_pids=()\n\n  function do_set_numvf()\n  {\n      echo 2 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n      sleep $((RANDOM%3+1))\n      echo 0 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n      sleep $((RANDOM%3+1))\n  }\n\n  function do_set_channel()\n  {\n      local nic=$(ls -1 --indicator-style=none /sys/bus/pci/devices/${vf0_dbsf}/net/)\n      [ -z \"$nic\" ] && { sleep $((RANDOM%3)) ; return 1; }\n      ifconfig $nic 192.168.18.5 netmask 255.255.255.0\n      ifconfig $nic up\n      ethtool -L $nic combined 1\n      ethtool -L $nic combined 4\n      sleep $((RANDOM%3))\n  }\n\n  function on_exit()\n  {\n      local pid\n      for pid in \"${g_pids[@]}\"; do\n          kill -0 \"$pid\" &>/dev/null && kill \"$pid\" &>/dev/null\n      done\n      g_pids=()\n  }\n\n  trap \"on_exit; exit\" EXIT\n\n  while :; do do_set_numvf ; done &\n  g_pids+=($!)\n  while :; do do_set_channel ; done &\n  g_pids+=($!)\n\n  wait\n\nResult:\n\n[ 3506.152887] iavf 0000:41:02.0: Removing device\n[ 3510.400799] ==================================================================\n[ 3510.400820] BUG: KASAN: slab-out-of-bounds in iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400823] Read of size 8 at addr ffff88b6f9311008 by task repro.sh/55536\n[ 3510.400823]\n[ 3510.400830] CPU: 101 PID: 55536 Comm: repro.sh Kdump: loaded Tainted: G           O     --------- -t - 4.18.0 #1\n[ 3510.400832] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021\n[ 3510.400835] Call Trace:\n[ 3510.400851]  dump_stack+0x71/0xab\n[ 3510.400860]  print_address_description+0x6b/0x290\n[ 3510.400865]  ? iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400868]  kasan_report+0x14a/0x2b0\n[ 3510.400873]  iavf_free_all_tx_resources+0x156/0x160 [iavf]\n[ 3510.400880]  iavf_remove+0x2b6/0xc70 [iavf]\n[ 3510.400884]  ? iavf_free_all_rx_resources+0x160/0x160 [iavf]\n[ 3510.400891]  ? wait_woken+0x1d0/0x1d0\n[ 3510.400895]  ? notifier_call_chain+0xc1/0x130\n[ 3510.400903]  pci_device_remove+0xa8/0x1f0\n[ 3510.400910]  device_release_driver_internal+0x1c6/0x460\n[ 3510.400916]  pci_stop_bus_device+0x101/0x150\n[ 3510.400919]  pci_stop_and_remove_bus_device+0xe/0x20\n[ 3510.400924]  pci_iov_remove_virtfn+0x187/0x420\n[ 3510.400927]  ? pci_iov_add_virtfn+0xe10/0xe10\n[ 3510.400929]  ? pci_get_subsys+0x90/0x90\n[ 3510.400932]  sriov_disable+0xed/0x3e0\n[ 3510.400936]  ? bus_find_device+0x12d/0x1a0\n[ 3510.400953]  i40e_free_vfs+0x754/0x1210 [i40e]\n[ 3510.400966]  ? i40e_reset_all_vfs+0x880/0x880 [i40e]\n[ 3510.400968]  ? pci_get_device+0x7c/0x90\n[ 3510.400970]  ? pci_get_subsys+0x90/0x90\n[ 3510.400982]  ? pci_vfs_assigned.part.7+0x144/0x210\n[ 3510.400987]  ? __mutex_lock_slowpath+0x10/0x10\n[ 3510.400996]  i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e]\n[ 3510.401001]  sriov_numvfs_store+0x214/0x290\n[ 3510.401005]  ? sriov_totalvfs_show+0x30/0x30\n[ 3510.401007]  ? __mutex_lock_slowpath+0x10/0x10\n[ 3510.401011]  ? __check_object_size+0x15a/0x350\n[ 3510.401018]  kernfs_fop_write+0x280/0x3f0\n[ 3510.401022]  vfs_write+0x145/0x440\n[ 3510.401025]  ksys_write+0xab/0x160\n[ 3510.401028]  ? __ia32_sys_read+0xb0/0xb0\n[ 3510.401031]  ? fput_many+0x1a/0x120\n[ 3510.401032]  ? filp_close+0xf0/0x130\n[ 3510.401038]  do_syscall_64+0xa0/0x370\n[ 3510.401041]  ? page_fault+0x8/0x30\n[ 3510.401043]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n[ 3510.401073] RIP: 0033:0x7f3a9bb842c0\n[ 3510.401079] Code: 73 01 c3 48 8b 0d d8 cb 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 24 2d 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d \n---truncated---"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable function is reached only through the ethtool interface — `SIOCETHTOOL`/`ETHTOOL_SCHANNELS` ioctl or the `ETHTOOL_MSG_CHANNELS_SET` genetlink message — both of which require a local process on the machine running the iavf driver. No remote or adjacent-network packet path reaches `iavf_set_channels()`.\nAC:L - The attacker fully drives the triggering side and can spam `ethtool -L <if> combined 1/16` in a tight loop indefinitely at no cost; the required 20-second reset stall recurs routinely in the SR-IOV lifecycle (VF hot-plug/unplug, `sriov_numvfs` changes, PF driver reset, FLR, PF saturated by many simultaneous VF resets), so the OOB fires reliably rather than requiring a one-shot narrow window. Once `iavf_reset_task` enters its own 20 s \"reset never finished\" wait, any concurrently-waiting `ethtool -L` is guaranteed to time out and corrupt the counter.\nPR:L - Setting channels is gated on `ns_capable(net->user_ns, CAP_NET_ADMIN)` / `GENL_UNS_ADMIN_PERM`, i.e. CAP_NET_ADMIN relative to the owning user namespace, which an unprivileged user holds inside a user+network namespace — the standard SR-IOV-to-container deployment (SR-IOV CNI / DPDK / telco pods) moves the VF netdev into exactly such a namespace. Additionally, harvesting the resulting out-of-bounds data via `ethtool -S` (`ETHTOOL_GSTATS`) requires no privileges at all.\nUI:N - The attacker performs the entire sequence themselves with ethtool calls; no victim action, file open, or mount is needed. The concurrent reset stall is a device/PF lifecycle event, not a user interaction.\nS:U - The out-of-bounds accesses corrupt kernel slab memory belonging to the same kernel that the attacker is already interacting with; no VM, IOMMU, or sandbox boundary is crossed. Standard local kernel memory-corruption scope.\nC:H - With the counter inflated, `iavf_get_ethtool_stats()` reads `tx_rings[i]`/`rx_rings[i]` far past the kcalloc'd array and copies those adjacent kernel-heap u64s directly into a userspace buffer via `ethtool -S`, which needs no privileges — a clean, repeatable multi-kilobyte heap disclosure including kernel pointers.\nI:H - `iavf_configure_tx()`/`iavf_configure_rx()` write `tail`, `rx_buf_len` and `flags` past the end of the array, and `iavf_free_tx_resources()` calls `kfree()`, `memset(desc, 0, size)` and `dma_free_coherent()` on pointers/sizes read out of bounds — an arbitrary-free and arbitrary-zeroing primitive over groomable heap that is exploitable for control-flow hijack.\nA:H - The commit's own reproducer produces a KASAN slab-out-of-bounds oops in `iavf_free_all_tx_resources()` during `iavf_remove()`; the racing `iavf_disable_vf()` path additionally leaves `tx_rings`/`rx_rings` NULL with a non-zero counter, giving a NULL+offset dereference. Either way the result is a kernel panic, plus a 20-second rtnl_lock hold that stalls the whole networking stack."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/intel/iavf/iavf_ethtool.c"
                    ],
                    "versions": [
                        {
                            "version": "1555d83ddbb7204ef60c58aee6ca3bbef2c5e99f",
                            "lessThan": "b92defe4e8ee86996c16417ad8c804cb4395fddd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "68d4274034e618b7f190dc9fbfc4f3436a7430f4",
                            "lessThan": "0fb37ce6c01e17839e26d03222f0b44e6a3ed2b9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
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                            "lessThan": "6e1d8f1332076a002e6d910d255aa5903d341c56",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e5e6b5d9d1334d3490326b6922a2daaf56a867f",
                            "lessThan": "65ecebc9ac09427b2c65f271cd5e5bd536c3fe38",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4e5e6b5d9d1334d3490326b6922a2daaf56a867f",
                            "lessThan": "7c4bced3caa749ce468b0c5de711c98476b23a52",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.10.82",
                            "lessThan": "5.10.188",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.5",
                            "lessThan": "5.15.123",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/intel/iavf/iavf_ethtool.c"
                    ],
                    "versions": [
                        {
                            "version": "5.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.188",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.123",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.42",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.7",
                            "lessThanOrEqual": "6.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.5",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10.82",
                                    "versionEndExcluding": "5.10.188"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.5",
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                                    "versionStartIncluding": "5.16",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "5.16",
                                    "versionEndExcluding": "6.5"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b92defe4e8ee86996c16417ad8c804cb4395fddd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0fb37ce6c01e17839e26d03222f0b44e6a3ed2b9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6e1d8f1332076a002e6d910d255aa5903d341c56"
                },
                {
                    "url": "https://git.kernel.org/stable/c/65ecebc9ac09427b2c65f271cd5e5bd536c3fe38"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7c4bced3caa749ce468b0c5de711c98476b23a52"
                }
            ],
            "title": "iavf: Fix out-of-bounds when setting channels on remove",
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}