CVE-2024-35958

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(uncompleted TX transactions).\nThe function assumes that the processed TX queue is necessarily from\nthe first category listed above and ends up using napi_consume_skb()\nfor descriptors belonging to an XDP specific queue.\n\nThis patch solves a bug in which, in case of a VF reset, the\ndescriptors aren't freed correctly, leading to crashes."}], "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 faulty free is on the driver teardown/reset path (`ena_down()` via ifdown, ethtool ring/channel change, MTU change, XDP detach, or watchdog reset), not on the packet receive path, so entry requires local access to the host even though the bytes that form the bogus sk_buff come from remotely received frames.\nAC:L - With XDP_TX/XDP_REDIRECT traffic flowing, the TX ring always holds uncompleted descriptors, so any down/reset deterministically hits `dev_kfree_skb_any()` on an `xdp_frame`; the attacker can both generate the traffic and induce the teardown, with no race or memory-layout condition outside their control.\nPR:L - In deployments where an XDP program is already attached (a configuration precondition, not an attack step), an unprivileged local user can drive the reset through the ENA watchdog paths that also monitor XDP queues \u2014 missed TX completions and `RESET_SUSPECTED_POLL_STARVATION` under load \u2014 and hypervisor VF resets occur without any local privilege at all.\nUI:N - No victim action is needed; the reset/teardown is initiated by the attacker, the watchdog, or the device itself while XDP frames are in flight.\nS:U - The corruption stays within the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Freeing an `xdp_frame` as an `sk_buff` makes the kernel interpret ~200 bytes of packet headroom as sk_buff fields and returns a driver-owned page into `skbuff_cache`, so subsequent skb allocations can alias attacker-visible network buffers, yielding kernel memory disclosure.\nI:H - This is a full type confusion: `consume_skb()` performs a refcount decrement through a bogus `_skb_refdst`, an indirect call through `skb->destructor`, page puts from a fabricated `skb_shinfo`, and a `kmem_cache_free()` of a non-slab pointer, giving heap-corruption and control-flow-hijack primitives with attacker-influenced field values.\nA:H - The commit itself states the incorrect frees lead to crashes on VF reset; slab corruption and wild pointer dereferences reliably produce a kernel oops or panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/amazon/ena/ena_netdev.c"], "versions": [{"version": "548c4940b9f1f527f81509468dd60b61418880b6", "lessThan": "b26aa765f7437e1bbe8db4c1641b12bd5dd378f0", 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"https://git.kernel.org/stable/c/19ff8fed3338898b70b2aad831386c78564912e1"}, {"url": "https://git.kernel.org/stable/c/5c7f2240d9835a7823d87f7460d8eae9f4e504c7"}, {"url": "https://git.kernel.org/stable/c/c31baa07f01307b7ae05f3ce32b89d8e2ba0cc1d"}, {"url": "https://git.kernel.org/stable/c/bf02d9fe00632d22fa91d34749c7aacf397b6cde"}], "title": "net: ena: Fix incorrect descriptor free behavior", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": 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family", "versions": [{"status": "affected", "version": "0", "lessThan": "V3.1", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "V1.1.1", "versionType": "custom"}], "defaultStatus": "unknown"}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-613116.html"}]}]}, "dataVersion": "5.2"}

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"providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-29T18:17:15.018Z"}}], "cna": {"title": "net: ena: Fix incorrect descriptor free behavior", "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 faulty free is on the driver teardown/reset path (`ena_down()` via ifdown, ethtool ring/channel change, MTU change, XDP detach, or watchdog reset), not on the packet receive path, so entry requires local access to the host even though the bytes that form the bogus sk_buff come from remotely received frames.\nAC:L - With XDP_TX/XDP_REDIRECT traffic flowing, the TX ring always holds uncompleted descriptors, so any down/reset deterministically hits `dev_kfree_skb_any()` on an `xdp_frame`; the attacker can both generate the traffic and induce the teardown, with no race or memory-layout condition outside their control.\nPR:L - In deployments where an XDP program is already attached (a configuration precondition, not an attack step), an unprivileged local user can drive the reset through the ENA watchdog paths that also monitor XDP queues \u2014 missed TX completions and `RESET_SUSPECTED_POLL_STARVATION` under load \u2014 and hypervisor VF resets occur without any local privilege at all.\nUI:N - No victim action is needed; the reset/teardown is initiated by the attacker, the watchdog, or the device itself while XDP frames are in flight.\nS:U - The corruption stays within the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Freeing an `xdp_frame` as an `sk_buff` makes the kernel interpret ~200 bytes of packet headroom as sk_buff fields and returns a driver-owned page into `skbuff_cache`, so subsequent skb allocations can alias attacker-visible network buffers, yielding kernel memory disclosure.\nI:H - This is a full type confusion: `consume_skb()` performs a refcount decrement through a bogus `_skb_refdst`, an indirect call through `skb->destructor`, page puts from a fabricated `skb_shinfo`, and a `kmem_cache_free()` of a non-slab pointer, giving heap-corruption and control-flow-hijack primitives with attacker-influenced field values.\nA:H - The commit itself states the incorrect frees lead to crashes on VF reset; slab corruption and wild pointer dereferences reliably produce a kernel oops or panic."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "548c4940b9f1f527f81509468dd60b61418880b6", "lessThan": "b26aa765f7437e1bbe8db4c1641b12bd5dd378f0", "versionType": "git"}, {"status": "affected", "version": "548c4940b9f1f527f81509468dd60b61418880b6", "lessThan": "fdfbf54d128ab6ab255db138488f9650485795a2", "versionType": "git"}, {"status": "affected", "version": 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ENA tiene dos tipos de colas TX: - colas que solo procesan paquetes TX que llegan desde la pila de red - colas que solo procesan paquetes TX reenviados a mediante instrucciones XDP_REDIRECT o XDP_TX. Ena_free_tx_bufs() recorre todos los descriptores en una cola de TX y desasigna + libera todos los descriptores que a\u00fan no han sido reconocidos por el dispositivo (transacciones de TX incompletas). La funci\u00f3n supone que la cola TX procesada es necesariamente de la primera categor\u00eda enumerada anteriormente y termina usando napi_consume_skb() para los descriptores que pertenecen a una cola XDP espec\u00edfica. Este parche resuelve un error por el cual, en caso de restablecer VF, los descriptores no se liberan correctamente, lo que provoca fallos."}], "id": "CVE-2024-35958", "lastModified": "2026-10-15T01:17:55.397", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-35958", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-29T18:17:10.294133Z", "version": "2.0.3"}}]}, "published": "2024-05-20T10:15:11.057", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/19ff8fed3338898b70b2aad831386c78564912e1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5c7f2240d9835a7823d87f7460d8eae9f4e504c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b26aa765f7437e1bbe8db4c1641b12bd5dd378f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bf02d9fe00632d22fa91d34749c7aacf397b6cde"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c31baa07f01307b7ae05f3ce32b89d8e2ba0cc1d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fdfbf54d128ab6ab255db138488f9650485795a2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/19ff8fed3338898b70b2aad831386c78564912e1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5c7f2240d9835a7823d87f7460d8eae9f4e504c7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b26aa765f7437e1bbe8db4c1641b12bd5dd378f0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bf02d9fe00632d22fa91d34749c7aacf397b6cde"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c31baa07f01307b7ae05f3ce32b89d8e2ba0cc1d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fdfbf54d128ab6ab255db138488f9650485795a2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-613116.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:4352", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.8.1.rt7.349.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-07-08T00:00:00Z"}, {"advisory": "RHSA-2024:4211", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.8.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-07-02T00:00:00Z"}, {"advisory": "RHSA-2024:4447", "cpe": "cpe:/o:redhat:rhel_aus:8.6", "package": "kernel-0:4.18.0-372.111.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2024-07-10T00:00:00Z"}, {"advisory": "RHSA-2024:4447", "cpe": "cpe:/o:redhat:rhel_tus:8.6", "package": "kernel-0:4.18.0-372.111.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2024-07-10T00:00:00Z"}, {"advisory": "RHSA-2024:4447", "cpe": "cpe:/o:redhat:rhel_e4s:8.6", "package": "kernel-0:4.18.0-372.111.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2024-07-10T00:00:00Z"}, {"advisory": "RHSA-2024:4740", "cpe": "cpe:/o:redhat:rhel_eus:8.8", "package": "kernel-0:4.18.0-477.64.1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-07-23T00:00:00Z"}, {"advisory": "RHSA-2024:4583", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.26.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-07-17T00:00:00Z"}, {"advisory": "RHSA-2024:4583", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.26.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-07-17T00:00:00Z"}, {"advisory": "RHSA-2024:4108", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.71.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-06-26T00:00:00Z"}, {"advisory": "RHSA-2024:4106", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.71.1.rt14.356.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-06-26T00:00:00Z"}], "bugzilla": {"description": "kernel: net: ena: Fix incorrect descriptor free behavior", "id": "2281925", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281925"}, "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": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: ena: Fix incorrect descriptor free behavior\nENA has two types of TX queues:\n- queues which only process TX packets arriving from the network stack\n- queues which only process TX packets forwarded to it by XDP_REDIRECT\nor XDP_TX instructions\nThe ena_free_tx_bufs() cycles through all descriptors in a TX queue\nand unmaps + frees every descriptor that hasn't been acknowledged yet\nby the device (uncompleted TX transactions).\nThe function assumes that the processed TX queue is necessarily from\nthe first category listed above and ends up using napi_consume_skb()\nfor descriptors belonging to an XDP specific queue.\nThis patch solves a bug in which, in case of a VF reset, the\ndescriptors aren't freed correctly, leading to crashes.", "This is a vulnerability in the Linux kernel's Elastic Network Adapter (ENA) driver, which manages network interfaces on certain platforms. The driver utilizes two types of transmit (TX) queues: one for packets from the network stack and another for packets directed by XDP (eXpress Data Path) operations. The function ena_free_tx_bufs() is responsible for unmapping and freeing descriptors of uncompleted TX transactions. However, it incorrectly assumes that all TX queues handle packets from the network stack, leading to improper handling of descriptors in XDP-specific queues. This mismanagement can result in descriptors not being freed correctly, potentially causing system crashes, especially during a Virtual Function (VF) reset. The issue has been resolved by updating the driver to correctly differentiate between the two types of TX queues, ensuring proper descriptor management. Users are advised to update their Linux kernel to a version that includes this fix to maintain system stability."], "name": "CVE-2024-35958", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35958\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35958"], "threat_severity": "Moderate"}

{}