{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43466", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.011Z", "datePublished": "2026-05-08T14:22:27.513Z", "dateUpdated": "2026-05-11T22:25:09.042Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:25:09.042Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery\n\nIn case of a TX error CQE, a recovery flow is triggered,\nmlx5e_reset_txqsq_cc_pc() resets dma_fifo_cc to 0 but not dma_fifo_pc,\ndesyncing the DMA FIFO producer and consumer.\n\nAfter recovery, the producer pushes new DMA entries at the old\ndma_fifo_pc, while the consumer reads from position 0.\nThis causes us to unmap stale DMA addresses from before the recovery.\n\nThe DMA FIFO is a purely software construct with no HW counterpart.\nAt the point of reset, all WQEs have been flushed so dma_fifo_cc is\nalready equal to dma_fifo_pc. There is no need to reset either counter,\nsimilar to how skb_fifo pc/cc are untouched.\n\nRemove the 'dma_fifo_cc = 0' reset.\n\nThis fixes the following WARNING:\n WARNING: CPU: 0 PID: 0 at drivers/iommu/dma-iommu.c:1240 iommu_dma_unmap_page+0x79/0x90\n Modules linked in: mlx5_vdpa vringh vdpa bonding mlx5_ib mlx5_vfio_pci ipip mlx5_fwctl tunnel4 mlx5_core ib_ipoib geneve ip6_gre ip_gre gre nf_tables ip6_tunnel rdma_ucm ib_uverbs ib_umad vfio_pci vfio_pci_core act_mirred act_skbedit act_vlan vhost_net vhost tap ip6table_mangle ip6table_nat ip6table_filter ip6_tables iptable_mangle cls_matchall nfnetlink_cttimeout act_gact cls_flower sch_ingress vhost_iotlb iptable_raw tunnel6 vfio_iommu_type1 vfio openvswitch nsh rpcsec_gss_krb5 auth_rpcgss oid_registry xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat nf_nat xt_addrtype br_netfilter overlay zram zsmalloc rpcrdma ib_iser libiscsi scsi_transport_iscsi rdma_cm iw_cm ib_cm ib_core fuse [last unloaded: nf_tables]\n CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc5_for_upstream_min_debug_2024_12_30_21_33 #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n RIP: 0010:iommu_dma_unmap_page+0x79/0x90\n Code: 2b 4d 3b 21 72 26 4d 3b 61 08 73 20 49 89 d8 44 89 f9 5b 4c 89 f2 4c 89 e6 48 89 ef 5d 41 5c 41 5d 41 5e 41 5f e9 c7 ae 9e ff <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 2e 0f 1f 84 00 00 00 00\n Call Trace:\n <IRQ>\n ? __warn+0x7d/0x110\n ? iommu_dma_unmap_page+0x79/0x90\n ? report_bug+0x16d/0x180\n ? handle_bug+0x4f/0x90\n ? exc_invalid_op+0x14/0x70\n ? asm_exc_invalid_op+0x16/0x20\n ? iommu_dma_unmap_page+0x79/0x90\n ? iommu_dma_unmap_page+0x2e/0x90\n dma_unmap_page_attrs+0x10d/0x1b0\n mlx5e_tx_wi_dma_unmap+0xbe/0x120 [mlx5_core]\n mlx5e_poll_tx_cq+0x16d/0x690 [mlx5_core]\n mlx5e_napi_poll+0x8b/0xac0 [mlx5_core]\n __napi_poll+0x24/0x190\n net_rx_action+0x32a/0x3b0\n ? mlx5_eq_comp_int+0x7e/0x270 [mlx5_core]\n ? notifier_call_chain+0x35/0xa0\n handle_softirqs+0xc9/0x270\n irq_exit_rcu+0x71/0xd0\n common_interrupt+0x7f/0xa0\n </IRQ>\n <TASK>\n asm_common_interrupt+0x22/0x40"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "baseScore": 8.2, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c"], "versions": [{"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261", "lessThan": "821f85d619f7f22cda7b9d7de89cf5eeb1d11544", "status": "affected", "versionType": "git"}, {"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261", "lessThan": "6eb68ecc5acc3b319986566c595990b8a7265b23", "status": "affected", "versionType": "git"}, {"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261", "lessThan": "6f41f7812bfa7f991b732a4b45c5c52fc4be3b4e", "status": "affected", "versionType": "git"}, {"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261", "lessThan": "383b37c04a4827ba60b2bafc1a6cdfd995aed58f", "status": "affected", "versionType": "git"}, {"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261", "lessThan": "9c5ee9b981ee050b73fdf3f4a2464d6f1a8e10a8", "status": "affected", "versionType": "git"}, {"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261", "lessThan": "ce1b19dd0684eeb68a124c11085bd611260b36d9", "status": "affected", "versionType": "git"}, {"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261", "lessThan": "829efcccfa8f69db5dc8332961295587d218cee6", "status": "affected", "versionType": "git"}, {"version": "db75373c91b0cfb6a68ad6ae88721e4e21ae6261", "lessThan": "1633111d69053512d099658d4a05fc736fab36b0", "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/mellanox/mlx5/core/en/reporter_tx.c"], "versions": [{"version": "4.17", "status": "affected"}, {"version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.19", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.9", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "4.17", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.18.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.19.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/821f85d619f7f22cda7b9d7de89cf5eeb1d11544"}, {"url": "https://git.kernel.org/stable/c/6eb68ecc5acc3b319986566c595990b8a7265b23"}, {"url": "https://git.kernel.org/stable/c/6f41f7812bfa7f991b732a4b45c5c52fc4be3b4e"}, {"url": "https://git.kernel.org/stable/c/383b37c04a4827ba60b2bafc1a6cdfd995aed58f"}, {"url": "https://git.kernel.org/stable/c/9c5ee9b981ee050b73fdf3f4a2464d6f1a8e10a8"}, {"url": "https://git.kernel.org/stable/c/ce1b19dd0684eeb68a124c11085bd611260b36d9"}, {"url": "https://git.kernel.org/stable/c/829efcccfa8f69db5dc8332961295587d218cee6"}, {"url": "https://git.kernel.org/stable/c/1633111d69053512d099658d4a05fc736fab36b0"}], "title": "net/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery\n\nIn case of a TX error CQE, a recovery flow is triggered,\nmlx5e_reset_txqsq_cc_pc() resets dma_fifo_cc to 0 but not dma_fifo_pc,\ndesyncing the DMA FIFO producer and consumer.\n\nAfter recovery, the producer pushes new DMA entries at the old\ndma_fifo_pc, while the consumer reads from position 0.\nThis causes us to unmap stale DMA addresses from before the recovery.\n\nThe DMA FIFO is a purely software construct with no HW counterpart.\nAt the point of reset, all WQEs have been flushed so dma_fifo_cc is\nalready equal to dma_fifo_pc. There is no need to reset either counter,\nsimilar to how skb_fifo pc/cc are untouched.\n\nRemove the 'dma_fifo_cc = 0' reset.\n\nThis fixes the following WARNING:\n WARNING: CPU: 0 PID: 0 at drivers/iommu/dma-iommu.c:1240 iommu_dma_unmap_page+0x79/0x90\n Modules linked in: mlx5_vdpa vringh vdpa bonding mlx5_ib mlx5_vfio_pci ipip mlx5_fwctl tunnel4 mlx5_core ib_ipoib geneve ip6_gre ip_gre gre nf_tables ip6_tunnel rdma_ucm ib_uverbs ib_umad vfio_pci vfio_pci_core act_mirred act_skbedit act_vlan vhost_net vhost tap ip6table_mangle ip6table_nat ip6table_filter ip6_tables iptable_mangle cls_matchall nfnetlink_cttimeout act_gact cls_flower sch_ingress vhost_iotlb iptable_raw tunnel6 vfio_iommu_type1 vfio openvswitch nsh rpcsec_gss_krb5 auth_rpcgss oid_registry xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat nf_nat xt_addrtype br_netfilter overlay zram zsmalloc rpcrdma ib_iser libiscsi scsi_transport_iscsi rdma_cm iw_cm ib_cm ib_core fuse [last unloaded: nf_tables]\n CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.13.0-rc5_for_upstream_min_debug_2024_12_30_21_33 #1\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014\n RIP: 0010:iommu_dma_unmap_page+0x79/0x90\n Code: 2b 4d 3b 21 72 26 4d 3b 61 08 73 20 49 89 d8 44 89 f9 5b 4c 89 f2 4c 89 e6 48 89 ef 5d 41 5c 41 5d 41 5e 41 5f e9 c7 ae 9e ff <0f> 0b 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 2e 0f 1f 84 00 00 00 00\n Call Trace:\n <IRQ>\n ? __warn+0x7d/0x110\n ? iommu_dma_unmap_page+0x79/0x90\n ? report_bug+0x16d/0x180\n ? handle_bug+0x4f/0x90\n ? exc_invalid_op+0x14/0x70\n ? asm_exc_invalid_op+0x16/0x20\n ? iommu_dma_unmap_page+0x79/0x90\n ? iommu_dma_unmap_page+0x2e/0x90\n dma_unmap_page_attrs+0x10d/0x1b0\n mlx5e_tx_wi_dma_unmap+0xbe/0x120 [mlx5_core]\n mlx5e_poll_tx_cq+0x16d/0x690 [mlx5_core]\n mlx5e_napi_poll+0x8b/0xac0 [mlx5_core]\n __napi_poll+0x24/0x190\n net_rx_action+0x32a/0x3b0\n ? mlx5_eq_comp_int+0x7e/0x270 [mlx5_core]\n ? notifier_call_chain+0x35/0xa0\n handle_softirqs+0xc9/0x270\n irq_exit_rcu+0x71/0xd0\n common_interrupt+0x7f/0xa0\n </IRQ>\n <TASK>\n asm_common_interrupt+0x22/0x40"}], "id": "CVE-2026-43466", "lastModified": "2026-05-12T14:10:27.343", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-08T15:16:59.543", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1633111d69053512d099658d4a05fc736fab36b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/383b37c04a4827ba60b2bafc1a6cdfd995aed58f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6eb68ecc5acc3b319986566c595990b8a7265b23"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6f41f7812bfa7f991b732a4b45c5c52fc4be3b4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/821f85d619f7f22cda7b9d7de89cf5eeb1d11544"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/829efcccfa8f69db5dc8332961295587d218cee6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c5ee9b981ee050b73fdf3f4a2464d6f1a8e10a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ce1b19dd0684eeb68a124c11085bd611260b36d9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: net/mlx5e: Fix DMA FIFO desync on error CQE SQ recovery", "id": "2468160", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468160"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-821", "details": ["A flaw was found in the Linux kernel's mlx5e network driver. During a transmit (TX) error recovery process, a desynchronization occurs in the Direct Memory Access (DMA) First-In, First-Out (FIFO) buffer. This desynchronization causes the system to incorrectly unmap memory addresses, which can lead to memory corruption. This issue could result in a system crash, causing a denial of service."], "name": "CVE-2026-43466", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43466\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43466\nhttps://lore.kernel.org/linux-cve-announce/2026050803-CVE-2026-43466-5337@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db75373c91b0cfb6a68ad6ae88721e4e21ae6261,821f85d619f7f22cda7b9d7de89cf5eeb1d11544)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db75373c91b0cfb6a68ad6ae88721e4e21ae6261,6eb68ecc5acc3b319986566c595990b8a7265b23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db75373c91b0cfb6a68ad6ae88721e4e21ae6261,6f41f7812bfa7f991b732a4b45c5c52fc4be3b4e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db75373c91b0cfb6a68ad6ae88721e4e21ae6261,383b37c04a4827ba60b2bafc1a6cdfd995aed58f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db75373c91b0cfb6a68ad6ae88721e4e21ae6261,9c5ee9b981ee050b73fdf3f4a2464d6f1a8e10a8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db75373c91b0cfb6a68ad6ae88721e4e21ae6261,ce1b19dd0684eeb68a124c11085bd611260b36d9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db75373c91b0cfb6a68ad6ae88721e4e21ae6261,829efcccfa8f69db5dc8332961295587d218cee6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[db75373c91b0cfb6a68ad6ae88721e4e21ae6261,1633111d69053512d099658d4a05fc736fab36b0)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.253,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.167,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.130,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.78,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.19,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.9,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T19:15:14.827535+00:00", "updated": "2026-05-11T09:15:26.608434+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}