CVE-2026-98074 (GCVE-0-2026-98074)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:24 – Updated: 2026-09-25 10:24
VLAI
Title
bonding: do not clear curr_active_slave prematurely when releasing all slaves
Summary
In the Linux kernel, the following vulnerability has been resolved: bonding: do not clear curr_active_slave prematurely when releasing all slaves When releasing all slaves during bond destruction (all == true), __bond_release_one() unconditionally clears bond->curr_active_slave to NULL in every iteration. If a backup slave is released before the active slave, bond_alb_deinit_slave() triggers rlb_teach_disabled_mac_on_primary(), which increments the active slave dev promiscuity counter and sets bond_info->primary_is_promisc = 1. Because bond->curr_active_slave was prematurely cleared to NULL when releasing the backup slave, the subsequent iteration releasing the active slave evaluates oldcurrent as NULL, so bond_change_active_slave(bond, NULL) is skipped. Consequently, bond_alb_handle_active_change() is never called to decrement the promiscuity counter, permanently leaking promiscuous mode on the physical device after bond teardown. When oldcurrent == slave, bond_change_active_slave(bond, NULL) already sets bond->curr_active_slave to NULL. We only need to avoid selecting a new active slave when all == true. Replace the if (all) branch with if (!all && oldcurrent == slave).
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0896341a44bf04bf6149d9307fe4686006f3eee1 , < d6ef22e79c2be3612868daede0e9a84f05439d9e (git)
Affected: 0896341a44bf04bf6149d9307fe4686006f3eee1 , < 19ba7ecfade159b3702c78a360fd7d971e2b7109 (git)
Affected: 0896341a44bf04bf6149d9307fe4686006f3eee1 , < 6d0ee411d5437f3d126ea6979acb83a8da29dc81 (git)
Affected: 0896341a44bf04bf6149d9307fe4686006f3eee1 , < af602c7aa5fedc9be3043244017aef4f26c96b70 (git)
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Linux Linux Affected: 3.9
Unaffected: 0 , < 3.9 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/bonding/bond_main.c"
          ],
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              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
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                  "versionStartIncluding": "3.9",
                  "vulnerable": true
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: do not clear curr_active_slave prematurely when releasing all slaves\n\nWhen releasing all slaves during bond destruction (all == true),\n__bond_release_one() unconditionally clears bond-\u003ecurr_active_slave to\nNULL in every iteration.\n\nIf a backup slave is released before the active slave,\nbond_alb_deinit_slave() triggers rlb_teach_disabled_mac_on_primary(),\nwhich increments the active slave dev promiscuity counter and sets\nbond_info-\u003eprimary_is_promisc = 1.\n\nBecause bond-\u003ecurr_active_slave was prematurely cleared to NULL when\nreleasing the backup slave, the subsequent iteration releasing the active\nslave evaluates oldcurrent as NULL, so bond_change_active_slave(bond, NULL)\nis skipped. Consequently, bond_alb_handle_active_change() is never called\nto decrement the promiscuity counter, permanently leaking promiscuous\nmode on the physical device after bond teardown.\n\nWhen oldcurrent == slave, bond_change_active_slave(bond, NULL) already sets\nbond-\u003ecurr_active_slave to NULL. We only need to avoid selecting a new\nactive slave when all == true. Replace the if (all) branch with\nif (!all \u0026\u0026 oldcurrent == slave)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:24:13.870Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/d6ef22e79c2be3612868daede0e9a84f05439d9e"
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        },
        {
          "url": "https://git.kernel.org/stable/c/6d0ee411d5437f3d126ea6979acb83a8da29dc81"
        },
        {
          "url": "https://git.kernel.org/stable/c/af602c7aa5fedc9be3043244017aef4f26c96b70"
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      ],
      "title": "bonding: do not clear curr_active_slave prematurely when releasing all slaves",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98074",
    "datePublished": "2026-09-25T10:24:13.870Z",
    "dateReserved": "2026-09-25T10:19:56.074Z",
    "dateUpdated": "2026-09-25T10:24:13.870Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                "product": "Linux",
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                ],
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                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                    "versionType": "semver"
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                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: do not clear curr_active_slave prematurely when releasing all slaves\n\nWhen releasing all slaves during bond destruction (all == true),\n__bond_release_one() unconditionally clears bond-\u003ecurr_active_slave to\nNULL in every iteration.\n\nIf a backup slave is released before the active slave,\nbond_alb_deinit_slave() triggers rlb_teach_disabled_mac_on_primary(),\nwhich increments the active slave dev promiscuity counter and sets\nbond_info-\u003eprimary_is_promisc = 1.\n\nBecause bond-\u003ecurr_active_slave was prematurely cleared to NULL when\nreleasing the backup slave, the subsequent iteration releasing the active\nslave evaluates oldcurrent as NULL, so bond_change_active_slave(bond, NULL)\nis skipped. Consequently, bond_alb_handle_active_change() is never called\nto decrement the promiscuity counter, permanently leaking promiscuous\nmode on the physical device after bond teardown.\n\nWhen oldcurrent == slave, bond_change_active_slave(bond, NULL) already sets\nbond-\u003ecurr_active_slave to NULL. We only need to avoid selecting a new\nactive slave when all == true. Replace the if (all) branch with\nif (!all \u0026\u0026 oldcurrent == slave)."
          }
        ],
        "id": "CVE-2026-98074",
        "lastModified": "2026-09-25T11:17:36.730",
        "metrics": {},
        "published": "2026-09-25T11:17:36.730",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.