CVE-2024-42071

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-42071", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-29T15:50:41.168Z", "datePublished": "2024-07-29T15:52:34.714Z", "dateUpdated": "2026-08-05T11:35:29.256Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:29.256Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nionic: use dev_consume_skb_any outside of napi\n\nIf we're not in a NAPI softirq context, we need to be careful\nabout how we call napi_consume_skb(), specifically we need to\ncall it with budget==0 to signal to it that we're not in a\nsafe context.\n\nThis was found while running some configuration stress testing\nof traffic and a change queue config loop running, and this\ncurious note popped out:\n\n[ 4371.402645] BUG: using smp_processor_id() in preemptible [00000000] code: ethtool/20545\n[ 4371.402897] caller is napi_skb_cache_put+0x16/0x80\n[ 4371.403120] CPU: 25 PID: 20545 Comm: ethtool Kdump: loaded Tainted: G OE 6.10.0-rc3-netnext+ #8\n[ 4371.403302] Hardware name: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 01/23/2021\n[ 4371.403460] Call Trace:\n[ 4371.403613] <TASK>\n[ 4371.403758] dump_stack_lvl+0x4f/0x70\n[ 4371.403904] check_preemption_disabled+0xc1/0xe0\n[ 4371.404051] napi_skb_cache_put+0x16/0x80\n[ 4371.404199] ionic_tx_clean+0x18a/0x240 [ionic]\n[ 4371.404354] ionic_tx_cq_service+0xc4/0x200 [ionic]\n[ 4371.404505] ionic_tx_flush+0x15/0x70 [ionic]\n[ 4371.404653] ? ionic_lif_qcq_deinit.isra.23+0x5b/0x70 [ionic]\n[ 4371.404805] ionic_txrx_deinit+0x71/0x190 [ionic]\n[ 4371.404956] ionic_reconfigure_queues+0x5f5/0xff0 [ionic]\n[ 4371.405111] ionic_set_ringparam+0x2e8/0x3e0 [ionic]\n[ 4371.405265] ethnl_set_rings+0x1f1/0x300\n[ 4371.405418] ethnl_default_set_doit+0xbb/0x160\n[ 4371.405571] genl_family_rcv_msg_doit+0xff/0x130\n\t[...]\n\nI found that ionic_tx_clean() calls napi_consume_skb() which calls\nnapi_skb_cache_put(), but before that last call is the note\n /* Zero budget indicate non-NAPI context called us, like netpoll */\nand\n DEBUG_NET_WARN_ON_ONCE(!in_softirq());\n\nThose are pretty big hints that we're doing it wrong. We can pass a\ncontext hint down through the calls to let ionic_tx_clean() know what\nwe're doing so it can call napi_consume_skb() correctly."}], "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 path is only reached through local administrative netdev operations \u2014 ethtool netlink/ioctl (`ETHTOOL_MSG_RINGS_SET`, `ETHTOOL_MSG_CHANNELS_SET`), `ip link set down`, or MTU/XDP changes \u2014 all issued from the local system. Remote packets cannot invoke `ionic_txrx_deinit()`.\nAC:L - The attacker controls both sides of the race: they generate the TX traffic that leaves skbs pending on the queue and the softirq load on the CPU, and they issue the reconfiguration/down operations in a loop (exactly the \"traffic plus queue-config loop\" stress the reporter used). The path can be retriggered indefinitely with no attacker-uncontrollable precondition.\nPR:L - The gates are `GENL_UNS_ADMIN_PERM` / `ns_capable(net->user_ns, CAP_NET_ADMIN)`, which are namespace-scoped rather than requiring real root \u2014 an unprivileged user with CAP_NET_ADMIN in a user namespace owning a netns that holds an ionic SR-IOV VF (a common SmartNIC container/Kubernetes deployment) can reach it. Per kernel scoring guidance, namespace-reachable CAP_NET_ADMIN is Low, not High.\nUI:N - The attacker performs the queue reconfiguration and traffic generation entirely on their own; no action by any other user or administrator is required.\nS:U - The corruption is confined to kernel per-CPU allocator state within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Corrupting the unlocked per-CPU `napi_alloc_cache` lets a stale or duplicated `sk_buff` pointer be reissued by `napi_skb_cache_get()`, producing a use-after-free on an object whose contents are attacker-controlled network data \u2014 a reliable kernel memory disclosure primitive.\nI:H - The same race yields either a double-free/UAF of `sk_buff` objects or, when the `skb_count == NAPI_SKB_CACHE_SIZE` equality check is stepped over, out-of-bounds pointer writes past the end of `skb_cache[]` into adjacent per-CPU data \u2014 both are established arbitrary-write/control-flow-hijack primitives.\nA:H - Handing an already-freed or garbage skb pointer back into the network stack, or freeing pointers via `kmem_cache_free_bulk()` from a corrupted array, reliably oopses or panics the kernel; with `panic_on_warn` the accompanying `DEBUG_NET_WARN_ON_ONCE(!in_softirq())` splat alone halts the machine."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/pensando/ionic/ionic_dev.h", "drivers/net/ethernet/pensando/ionic/ionic_lif.c", "drivers/net/ethernet/pensando/ionic/ionic_txrx.c"], "versions": [{"version": "386e69865311044b576ff536c99c6ee9cc98a228", "lessThan": "ef7646ed49fff962e97b276f4ab91327a67eeb5a", "status": "affected", "versionType": "git"}, {"version": "386e69865311044b576ff536c99c6ee9cc98a228", "lessThan": "84b767f9e34fdb143c09e66a2a20722fc2921821", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/pensando/ionic/ionic_dev.h", "drivers/net/ethernet/pensando/ionic/ionic_lif.c", "drivers/net/ethernet/pensando/ionic/ionic_txrx.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.9.8", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.9.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ef7646ed49fff962e97b276f4ab91327a67eeb5a"}, {"url": "https://git.kernel.org/stable/c/84b767f9e34fdb143c09e66a2a20722fc2921821"}], "title": "ionic: use dev_consume_skb_any outside of napi", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:54:32.247Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/ef7646ed49fff962e97b276f4ab91327a67eeb5a", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/84b767f9e34fdb143c09e66a2a20722fc2921821", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42071", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:19:43.105233Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:58.060Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/ef7646ed49fff962e97b276f4ab91327a67eeb5a", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/84b767f9e34fdb143c09e66a2a20722fc2921821", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:54:32.247Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42071", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:19:43.105233Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:19.901Z"}}], "cna": {"title": "ionic: use dev_consume_skb_any outside of napi", "metrics": [{"cvssV3_1": {"version": "3.1", "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"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable path is only reached through local administrative netdev operations \u2014 ethtool netlink/ioctl (`ETHTOOL_MSG_RINGS_SET`, `ETHTOOL_MSG_CHANNELS_SET`), `ip link set down`, or MTU/XDP changes \u2014 all issued from the local system. Remote packets cannot invoke `ionic_txrx_deinit()`.\nAC:L - The attacker controls both sides of the race: they generate the TX traffic that leaves skbs pending on the queue and the softirq load on the CPU, and they issue the reconfiguration/down operations in a loop (exactly the \"traffic plus queue-config loop\" stress the reporter used). The path can be retriggered indefinitely with no attacker-uncontrollable precondition.\nPR:L - The gates are `GENL_UNS_ADMIN_PERM` / `ns_capable(net->user_ns, CAP_NET_ADMIN)`, which are namespace-scoped rather than requiring real root \u2014 an unprivileged user with CAP_NET_ADMIN in a user namespace owning a netns that holds an ionic SR-IOV VF (a common SmartNIC container/Kubernetes deployment) can reach it. Per kernel scoring guidance, namespace-reachable CAP_NET_ADMIN is Low, not High.\nUI:N - The attacker performs the queue reconfiguration and traffic generation entirely on their own; no action by any other user or administrator is required.\nS:U - The corruption is confined to kernel per-CPU allocator state within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Corrupting the unlocked per-CPU `napi_alloc_cache` lets a stale or duplicated `sk_buff` pointer be reissued by `napi_skb_cache_get()`, producing a use-after-free on an object whose contents are attacker-controlled network data \u2014 a reliable kernel memory disclosure primitive.\nI:H - The same race yields either a double-free/UAF of `sk_buff` objects or, when the `skb_count == NAPI_SKB_CACHE_SIZE` equality check is stepped over, out-of-bounds pointer writes past the end of `skb_cache[]` into adjacent per-CPU data \u2014 both are established arbitrary-write/control-flow-hijack primitives.\nA:H - Handing an already-freed or garbage skb pointer back into the network stack, or freeing pointers via `kmem_cache_free_bulk()` from a corrupted array, reliably oopses or panics the kernel; with `panic_on_warn` the accompanying `DEBUG_NET_WARN_ON_ONCE(!in_softirq())` splat alone halts the machine."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "386e69865311044b576ff536c99c6ee9cc98a228", "lessThan": "ef7646ed49fff962e97b276f4ab91327a67eeb5a", "versionType": "git"}, {"status": "affected", "version": "386e69865311044b576ff536c99c6ee9cc98a228", "lessThan": "84b767f9e34fdb143c09e66a2a20722fc2921821", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/pensando/ionic/ionic_dev.h", "drivers/net/ethernet/pensando/ionic/ionic_lif.c", "drivers/net/ethernet/pensando/ionic/ionic_txrx.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"status": "unaffected", "version": "0", "lessThan": "6.9", "versionType": "semver"}, {"status": "unaffected", "version": "6.9.8", "versionType": "semver", "lessThanOrEqual": "6.9.*"}, {"status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/pensando/ionic/ionic_dev.h", "drivers/net/ethernet/pensando/ionic/ionic_lif.c", "drivers/net/ethernet/pensando/ionic/ionic_txrx.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/ef7646ed49fff962e97b276f4ab91327a67eeb5a"}, {"url": "https://git.kernel.org/stable/c/84b767f9e34fdb143c09e66a2a20722fc2921821"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nionic: use dev_consume_skb_any outside of napi\n\nIf we're not in a NAPI softirq context, we need to be careful\nabout how we call napi_consume_skb(), specifically we need to\ncall it with budget==0 to signal to it that we're not in a\nsafe context.\n\nThis was found while running some configuration stress testing\nof traffic and a change queue config loop running, and this\ncurious note popped out:\n\n[ 4371.402645] BUG: using smp_processor_id() in preemptible [00000000] code: ethtool/20545\n[ 4371.402897] caller is napi_skb_cache_put+0x16/0x80\n[ 4371.403120] CPU: 25 PID: 20545 Comm: ethtool Kdump: loaded Tainted: G OE 6.10.0-rc3-netnext+ #8\n[ 4371.403302] Hardware name: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 01/23/2021\n[ 4371.403460] Call Trace:\n[ 4371.403613] <TASK>\n[ 4371.403758] dump_stack_lvl+0x4f/0x70\n[ 4371.403904] check_preemption_disabled+0xc1/0xe0\n[ 4371.404051] napi_skb_cache_put+0x16/0x80\n[ 4371.404199] ionic_tx_clean+0x18a/0x240 [ionic]\n[ 4371.404354] ionic_tx_cq_service+0xc4/0x200 [ionic]\n[ 4371.404505] ionic_tx_flush+0x15/0x70 [ionic]\n[ 4371.404653] ? ionic_lif_qcq_deinit.isra.23+0x5b/0x70 [ionic]\n[ 4371.404805] ionic_txrx_deinit+0x71/0x190 [ionic]\n[ 4371.404956] ionic_reconfigure_queues+0x5f5/0xff0 [ionic]\n[ 4371.405111] ionic_set_ringparam+0x2e8/0x3e0 [ionic]\n[ 4371.405265] ethnl_set_rings+0x1f1/0x300\n[ 4371.405418] ethnl_default_set_doit+0xbb/0x160\n[ 4371.405571] genl_family_rcv_msg_doit+0xff/0x130\n\t[...]\n\nI found that ionic_tx_clean() calls napi_consume_skb() which calls\nnapi_skb_cache_put(), but before that last call is the note\n /* Zero budget indicate non-NAPI context called us, like netpoll */\nand\n DEBUG_NET_WARN_ON_ONCE(!in_softirq());\n\nThose are pretty big hints that we're doing it wrong. We can pass a\ncontext hint down through the calls to let ionic_tx_clean() know what\nwe're doing so it can call napi_consume_skb() correctly."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.9.8", "versionStartIncluding": "6.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.10", "versionStartIncluding": "6.9"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:29.256Z"}}}, "cveMetadata": {"cveId": "CVE-2024-42071", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:35:29.256Z", "dateReserved": "2024-07-29T15:50:41.168Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-07-29T15:52:34.714Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/pensando/ionic/ionic_dev.h", "drivers/net/ethernet/pensando/ionic/ionic_lif.c", "drivers/net/ethernet/pensando/ionic/ionic_txrx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ef7646ed49fff962e97b276f4ab91327a67eeb5a", "status": "affected", "version": "386e69865311044b576ff536c99c6ee9cc98a228", "versionType": "git"}, {"lessThan": "84b767f9e34fdb143c09e66a2a20722fc2921821", "status": "affected", "version": "386e69865311044b576ff536c99c6ee9cc98a228", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/pensando/ionic/ionic_dev.h", "drivers/net/ethernet/pensando/ionic/ionic_lif.c", "drivers/net/ethernet/pensando/ionic/ionic_txrx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"lessThan": "6.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.9.*", "status": "unaffected", "version": "6.9.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "18FE1EAE-C36C-49FC-A5E0-0A661CDC561E", "versionEndExcluding": "6.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1557DCF8-46D3-4910-8B19-5C77412AB681", "versionEndExcluding": "6.9.8", "versionStartIncluding": "6.9.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nionic: use dev_consume_skb_any outside of napi\n\nIf we're not in a NAPI softirq context, we need to be careful\nabout how we call napi_consume_skb(), specifically we need to\ncall it with budget==0 to signal to it that we're not in a\nsafe context.\n\nThis was found while running some configuration stress testing\nof traffic and a change queue config loop running, and this\ncurious note popped out:\n\n[ 4371.402645] BUG: using smp_processor_id() in preemptible [00000000] code: ethtool/20545\n[ 4371.402897] caller is napi_skb_cache_put+0x16/0x80\n[ 4371.403120] CPU: 25 PID: 20545 Comm: ethtool Kdump: loaded Tainted: G OE 6.10.0-rc3-netnext+ #8\n[ 4371.403302] Hardware name: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 01/23/2021\n[ 4371.403460] Call Trace:\n[ 4371.403613] <TASK>\n[ 4371.403758] dump_stack_lvl+0x4f/0x70\n[ 4371.403904] check_preemption_disabled+0xc1/0xe0\n[ 4371.404051] napi_skb_cache_put+0x16/0x80\n[ 4371.404199] ionic_tx_clean+0x18a/0x240 [ionic]\n[ 4371.404354] ionic_tx_cq_service+0xc4/0x200 [ionic]\n[ 4371.404505] ionic_tx_flush+0x15/0x70 [ionic]\n[ 4371.404653] ? ionic_lif_qcq_deinit.isra.23+0x5b/0x70 [ionic]\n[ 4371.404805] ionic_txrx_deinit+0x71/0x190 [ionic]\n[ 4371.404956] ionic_reconfigure_queues+0x5f5/0xff0 [ionic]\n[ 4371.405111] ionic_set_ringparam+0x2e8/0x3e0 [ionic]\n[ 4371.405265] ethnl_set_rings+0x1f1/0x300\n[ 4371.405418] ethnl_default_set_doit+0xbb/0x160\n[ 4371.405571] genl_family_rcv_msg_doit+0xff/0x130\n\t[...]\n\nI found that ionic_tx_clean() calls napi_consume_skb() which calls\nnapi_skb_cache_put(), but before that last call is the note\n /* Zero budget indicate non-NAPI context called us, like netpoll */\nand\n DEBUG_NET_WARN_ON_ONCE(!in_softirq());\n\nThose are pretty big hints that we're doing it wrong. We can pass a\ncontext hint down through the calls to let ionic_tx_clean() know what\nwe're doing so it can call napi_consume_skb() correctly."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ionic: usa dev_consume_skb_any fuera de napi. Si no estamos en un contexto de softirq de NAPI, debemos tener cuidado con c\u00f3mo llamamos a napi_consume_skb(), espec\u00edficamente debemos llamarlo con Budget==0 para indicarle que no estamos en un contexto seguro. Esto se encontr\u00f3 mientras se ejecutaban algunas pruebas de estr\u00e9s de configuraci\u00f3n del tr\u00e1fico y se ejecutaba un bucle de configuraci\u00f3n de cola de cambios, y apareci\u00f3 esta nota curiosa: [4371.402645] ERROR: usar smp_processor_id() en c\u00f3digo interrumpible [00000000]: ethtool/20545 [4371.402897] la persona que llama es napi_skb_cache_put+0x16/0x80 [ 4371.403120] CPU: 25 PID: 20545 Comm: ethtool Kdump: loaded Tainted: G OE 6.10.0-rc3-netnext+ #8 [ 4371.403302] Nombre de hardware: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen 10, BIOSU32 23/01/2021 [ 4371.403460] Seguimiento de llamadas: [ 4371.403613] [ 4371.403758] dump_stack_lvl+0x4f/0x70 [ 4371.403904] check_preemption_disabled+0xc1/0xe0 [ 4371.40405 1] napi_skb_cache_put+0x16/0x80 [ 4371.404199] ionic_tx_clean+0x18a/0x240 [ i\u00f3nico] [4371.404354] ionic_tx_cq_service+0xc4/0x200 [i\u00f3nico] [4371.404505] ionic_tx_flush+0x15/0x70 [i\u00f3nico] [4371.404653]? ionic_lif_qcq_deinit.isra.23+0x5b/0x70 [ionic] [ 4371.404805] ionic_txrx_deinit+0x71/0x190 [ionic] [ 4371.404956] ionic_reconfigure_queues+0x5f5/0xff0 [ionic] [ 4371.4051 11] ionic_set_ringparam+0x2e8/0x3e0 [ionic] [4371.405265] ethnl_set_rings+ 0x1f1/0x300 [ 4371.405418] ethnl_default_set_doit+0xbb/0x160 [ 4371.405571] genl_family_rcv_msg_doit+0xff/0x130 [...] encontr\u00e9 que ionic_tx_clean() llama a napi_consume_skb() que llama a napi_skb_cache_put() , pero antes de esa \u00faltima llamada est\u00e1 la nota /* El presupuesto cero indica que nos llam\u00f3 un contexto que no es NAPI, como netpoll */ y DEBUG_NET_WARN_ON_ONCE(!in_softirq()); Esos son indicios bastante importantes de que lo estamos haciendo mal. Podemos pasar una sugerencia de contexto a trav\u00e9s de las llamadas para que ionic_tx_clean() sepa lo que estamos haciendo para que pueda llamar a napi_consume_skb() correctamente."}], "id": "CVE-2024-42071", "lastModified": "2026-08-04T11:19:31.393", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-42071", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:19:43.105233Z", "version": "2.0.3"}}]}, "published": "2024-07-29T16:15:06.623", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/84b767f9e34fdb143c09e66a2a20722fc2921821"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef7646ed49fff962e97b276f4ab91327a67eeb5a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/84b767f9e34fdb143c09e66a2a20722fc2921821"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef7646ed49fff962e97b276f4ab91327a67eeb5a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-834"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ionic: use dev_consume_skb_any outside of napi", "id": "2300509", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2300509"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-834", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nionic: use dev_consume_skb_any outside of napi\nIf we're not in a NAPI softirq context, we need to be careful\nabout how we call napi_consume_skb(), specifically we need to\ncall it with budget==0 to signal to it that we're not in a\nsafe context.\nThis was found while running some configuration stress testing\nof traffic and a change queue config loop running, and this\ncurious note popped out:\n[ 4371.402645] BUG: using smp_processor_id() in preemptible [00000000] code: ethtool/20545\n[ 4371.402897] caller is napi_skb_cache_put+0x16/0x80\n[ 4371.403120] CPU: 25 PID: 20545 Comm: ethtool Kdump: loaded Tainted: G OE 6.10.0-rc3-netnext+ #8\n[ 4371.403302] Hardware name: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 01/23/2021\n[ 4371.403460] Call Trace:\n[ 4371.403613] <TASK>\n[ 4371.403758] dump_stack_lvl+0x4f/0x70\n[ 4371.403904] check_preemption_disabled+0xc1/0xe0\n[ 4371.404051] napi_skb_cache_put+0x16/0x80\n[ 4371.404199] ionic_tx_clean+0x18a/0x240 [ionic]\n[ 4371.404354] ionic_tx_cq_service+0xc4/0x200 [ionic]\n[ 4371.404505] ionic_tx_flush+0x15/0x70 [ionic]\n[ 4371.404653] ? ionic_lif_qcq_deinit.isra.23+0x5b/0x70 [ionic]\n[ 4371.404805] ionic_txrx_deinit+0x71/0x190 [ionic]\n[ 4371.404956] ionic_reconfigure_queues+0x5f5/0xff0 [ionic]\n[ 4371.405111] ionic_set_ringparam+0x2e8/0x3e0 [ionic]\n[ 4371.405265] ethnl_set_rings+0x1f1/0x300\n[ 4371.405418] ethnl_default_set_doit+0xbb/0x160\n[ 4371.405571] genl_family_rcv_msg_doit+0xff/0x130\n[...]\nI found that ionic_tx_clean() calls napi_consume_skb() which calls\nnapi_skb_cache_put(), but before that last call is the note\n/* Zero budget indicate non-NAPI context called us, like netpoll */\nand\nDEBUG_NET_WARN_ON_ONCE(!in_softirq());\nThose are pretty big hints that we're doing it wrong. We can pass a\ncontext hint down through the calls to let ionic_tx_clean() know what\nwe're doing so it can call napi_consume_skb() correctly."], "name": "CVE-2024-42071", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42071\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42071\nhttps://lore.kernel.org/linux-cve-announce/2024072952-CVE-2024-42071-1749@gregkh/T"], "threat_severity": "Low"}

{}