{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43199", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.992Z", "datePublished": "2026-05-06T11:28:06.232Z", "dateUpdated": "2026-08-05T12:26:30.810Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:26:30.810Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix \"scheduling while atomic\" in IPsec MAC address query\n\nFix a \"scheduling while atomic\" bug in mlx5e_ipsec_init_macs() by\nreplacing mlx5_query_mac_address() with ether_addr_copy() to get the\nlocal MAC address directly from netdev->dev_addr.\n\nThe issue occurs because mlx5_query_mac_address() queries the hardware\nwhich involves mlx5_cmd_exec() that can sleep, but it is called from\nthe mlx5e_ipsec_handle_event workqueue which runs in atomic context.\n\nThe MAC address is already available in netdev->dev_addr, so no need\nto query hardware. This avoids the sleeping call and resolves the bug.\n\nCall trace:\n BUG: scheduling while atomic: kworker/u112:2/69344/0x00000200\n __schedule+0x7ab/0xa20\n schedule+0x1c/0xb0\n schedule_timeout+0x6e/0xf0\n __wait_for_common+0x91/0x1b0\n cmd_exec+0xa85/0xff0 [mlx5_core]\n mlx5_cmd_exec+0x1f/0x50 [mlx5_core]\n mlx5_query_nic_vport_mac_address+0x7b/0xd0 [mlx5_core]\n mlx5_query_mac_address+0x19/0x30 [mlx5_core]\n mlx5e_ipsec_init_macs+0xc1/0x720 [mlx5_core]\n mlx5e_ipsec_build_accel_xfrm_attrs+0x422/0x670 [mlx5_core]\n mlx5e_ipsec_handle_event+0x2b9/0x460 [mlx5_core]\n process_one_work+0x178/0x2e0\n worker_thread+0x2ea/0x430" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The vulnerable path runs in mlx5 IPsec packet offload event handling, which can be driven by traffic on an exposed IPsec tunnel. A remote peer can cause the NIC ESN object-change event without local execution on the target.\nAC:L - There is no attacker-controlled race to win; once a packet-offload tunnel SA with ESN is present, the event path deterministically reaches the atomic-sleep bug. Traffic volume/sequence advancement is attacker-influenced.\nPR:N - The SA setup is a normal deployment precondition for the affected IPsec offload service, not a privilege the attacker must hold on the target. The packet sender needs no local account or target-side administrative capability.\nUI:N - No victim user action is needed after the susceptible IPsec offload configuration exists. The trigger is packet/event driven.\nS:U - The impact is within the kernel and the mlx5/IPsec networking subsystem on the same host. It does not cross a VM, IOMMU, or other separate security authority boundary.\nC:N - The bug is a sleeping firmware MAC query while holding a spinlock, not an out-of-bounds access, UAF, or information disclosure primitive. No kernel memory is exposed.\nI:N - The vulnerable call does not corrupt memory or provide an attacker-controlled write. It only performs a blocking command from atomic context.\nA:H - The kernel reports BUG: scheduling while atomic and the scheduler path can panic via panic-on-warn or destabilize the worker/kernel state. The trigger can be repeated, making denial of service high impact." } ] } ], "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_accel/ipsec.c" ], "versions": [ { "version": "cee137a634318bfbda18ee5af45d300153b57fa5", "lessThan": "e1407fb7c337373dfaaae2445d828b0b9ae26a29", "status": "affected", "versionType": "git" }, { "version": "cee137a634318bfbda18ee5af45d300153b57fa5", "lessThan": "57957bc7f1865778ec9b1618e15515feb6df7eb4", "status": "affected", "versionType": "git" }, { "version": "cee137a634318bfbda18ee5af45d300153b57fa5", "lessThan": "546de94e41e92e1f7dc6213615fb7c794d05db98", "status": "affected", "versionType": "git" }, { "version": "cee137a634318bfbda18ee5af45d300153b57fa5", "lessThan": "859380694f434597407632c29f30fdb5e763e6cc", "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_accel/ipsec.c" ], "versions": [ { "version": "6.2", "status": "affected" }, { "version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.6", "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": "6.2", "versionEndExcluding": "6.12.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.19.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e1407fb7c337373dfaaae2445d828b0b9ae26a29" }, { "url": "https://git.kernel.org/stable/c/57957bc7f1865778ec9b1618e15515feb6df7eb4" }, { "url": "https://git.kernel.org/stable/c/546de94e41e92e1f7dc6213615fb7c794d05db98" }, { "url": "https://git.kernel.org/stable/c/859380694f434597407632c29f30fdb5e763e6cc" } ], "title": "net/mlx5e: Fix \"scheduling while atomic\" in IPsec MAC address query", "x_generator": { "engine": "bippy-1.2.0" } } } }