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bonding: do not clear curr_active_slave prematurely when releasing all slaves

Type: advisorySource: Official CVE List1 source record

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).

Announced Source revision 1
Original source ↗

CVE-2026-98074

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98074

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "0896341a44bf04bf6149d9307fe4686006f3eee1",
        "lessThan": "b1ded242135071769902778dbab081e3fc09730f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0896341a44bf04bf6149d9307fe4686006f3eee1",
        "lessThan": "e39b203ec9e73852098d41b26386172d51babeb9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0896341a44bf04bf6149d9307fe4686006f3eee1",
        "lessThan": "384739c631aa6749356ba062d6b7c9a484a733f6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0896341a44bf04bf6149d9307fe4686006f3eee1",
        "lessThan": "7b435c69a30b40efc642de98b9bfa95fcf2ad4f0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0896341a44bf04bf6149d9307fe4686006f3eee1",
        "lessThan": "d6ef22e79c2be3612868daede0e9a84f05439d9e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0896341a44bf04bf6149d9307fe4686006f3eee1",
        "lessThan": "19ba7ecfade159b3702c78a360fd7d971e2b7109",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0896341a44bf04bf6149d9307fe4686006f3eee1",
        "lessThan": "6d0ee411d5437f3d126ea6979acb83a8da29dc81",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0896341a44bf04bf6149d9307fe4686006f3eee1",
        "lessThan": "af602c7aa5fedc9be3043244017aef4f26c96b70",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/bonding/bond_main.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/bonding/bond_main.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98074

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38183 · Revision 1
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