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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98074

bonding: do not clear curr_active_slave prematurely when releasing all slaves

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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).

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 0896341a44bf04bf6149d9307fe4686006f3eee1 to < b1ded242135071769902778dbab081e3fc09730faffected
  • 0896341a44bf04bf6149d9307fe4686006f3eee1 to < e39b203ec9e73852098d41b26386172d51babeb9affected
  • 0896341a44bf04bf6149d9307fe4686006f3eee1 to < 384739c631aa6749356ba062d6b7c9a484a733f6affected
  • 0896341a44bf04bf6149d9307fe4686006f3eee1 to < 7b435c69a30b40efc642de98b9bfa95fcf2ad4f0affected
  • 0896341a44bf04bf6149d9307fe4686006f3eee1 to < d6ef22e79c2be3612868daede0e9a84f05439d9eaffected
  • 0896341a44bf04bf6149d9307fe4686006f3eee1 to < 19ba7ecfade159b3702c78a360fd7d971e2b7109affected
  • 0896341a44bf04bf6149d9307fe4686006f3eee1 to < 6d0ee411d5437f3d126ea6979acb83a8da29dc81affected
  • 0896341a44bf04bf6149d9307fe4686006f3eee1 to < af602c7aa5fedc9be3043244017aef4f26c96b70affected

Linux Linux

Default version status: affected

  • 3.9affected
  • 0 to < 3.9unaffected
  • 5.10.271 to ≤ 5.10.*unaffected
  • 5.15.222 to ≤ 5.15.*unaffected
  • 6.1.189 to ≤ 6.1.*unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.111 to ≤ 6.12.*unaffected
  • 6.18.53 to ≤ 6.18.*unaffected
  • 7.2.7 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References