{"id":"CVE-2026-98074","summary":"bonding: do not clear curr_active_slave prematurely when releasing all slaves","details":"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 && oldcurrent == slave).","modified":"2026-09-27T03:47:35.106396874Z","published":"2026-09-25T10:24:13.870Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98074.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/19ba7ecfade159b3702c78a360fd7d971e2b7109"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6d0ee411d5437f3d126ea6979acb83a8da29dc81"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af602c7aa5fedc9be3043244017aef4f26c96b70"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d6ef22e79c2be3612868daede0e9a84f05439d9e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98074.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98074"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0896341a44bf04bf6149d9307fe4686006f3eee1"},{"fixed":"d6ef22e79c2be3612868daede0e9a84f05439d9e"},{"fixed":"19ba7ecfade159b3702c78a360fd7d971e2b7109"},{"fixed":"6d0ee411d5437f3d126ea6979acb83a8da29dc81"},{"fixed":"af602c7aa5fedc9be3043244017aef4f26c96b70"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98074.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.9.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98074.json"}}],"schema_version":"1.9.0"}