CVE-2026-43199 (GCVE-0-2026-43199)
Vulnerability from cvelistv5
Published
2026-05-06 11:28
Modified
2026-08-05 12:26
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix "scheduling while atomic" in IPsec MAC address query Fix a "scheduling while atomic" bug in mlx5e_ipsec_init_macs() by replacing mlx5_query_mac_address() with ether_addr_copy() to get the local MAC address directly from netdev->dev_addr. The issue occurs because mlx5_query_mac_address() queries the hardware which involves mlx5_cmd_exec() that can sleep, but it is called from the mlx5e_ipsec_handle_event workqueue which runs in atomic context. The MAC address is already available in netdev->dev_addr, so no need to query hardware. This avoids the sleeping call and resolves the bug. Call trace: BUG: scheduling while atomic: kworker/u112:2/69344/0x00000200 __schedule+0x7ab/0xa20 schedule+0x1c/0xb0 schedule_timeout+0x6e/0xf0 __wait_for_common+0x91/0x1b0 cmd_exec+0xa85/0xff0 [mlx5_core] mlx5_cmd_exec+0x1f/0x50 [mlx5_core] mlx5_query_nic_vport_mac_address+0x7b/0xd0 [mlx5_core] mlx5_query_mac_address+0x19/0x30 [mlx5_core] mlx5e_ipsec_init_macs+0xc1/0x720 [mlx5_core] mlx5e_ipsec_build_accel_xfrm_attrs+0x422/0x670 [mlx5_core] mlx5e_ipsec_handle_event+0x2b9/0x460 [mlx5_core] process_one_work+0x178/0x2e0 worker_thread+0x2ea/0x430
References
Impacted products
Vendor Product Version
Linux Linux Version: cee137a634318bfbda18ee5af45d300153b57fa5
Version: cee137a634318bfbda18ee5af45d300153b57fa5
Version: cee137a634318bfbda18ee5af45d300153b57fa5
Version: cee137a634318bfbda18ee5af45d300153b57fa5
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e1407fb7c337373dfaaae2445d828b0b9ae26a29",
              "status": "affected",
              "version": "cee137a634318bfbda18ee5af45d300153b57fa5",
              "versionType": "git"
            },
            {
              "lessThan": "57957bc7f1865778ec9b1618e15515feb6df7eb4",
              "status": "affected",
              "version": "cee137a634318bfbda18ee5af45d300153b57fa5",
              "versionType": "git"
            },
            {
              "lessThan": "546de94e41e92e1f7dc6213615fb7c794d05db98",
              "status": "affected",
              "version": "cee137a634318bfbda18ee5af45d300153b57fa5",
              "versionType": "git"
            },
            {
              "lessThan": "859380694f434597407632c29f30fdb5e763e6cc",
              "status": "affected",
              "version": "cee137a634318bfbda18ee5af45d300153b57fa5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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-\u003edev_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-\u003edev_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": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:26:30.810Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43199",
    "datePublished": "2026-05-06T11:28:06.232Z",
    "dateReserved": "2026-05-01T14:12:55.992Z",
    "dateUpdated": "2026-08-05T12:26:30.810Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.