{"id":"CVE-2026-98305","summary":"net: dsa: mxl862xx: disable the stats poll on teardown","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: mxl862xx: disable the stats poll on teardown\n\nmxl862xx_setup() arms the stats poll before mxl862xx_setup_mdio(), and\nnothing stops it until dsa_register_switch() has returned an error to\nmxl862xx_probe(). DSA frees the dsa_port list before it returns, so a\npoll that fires once .setup or a later step of dsa_tree_setup() has\nfailed walks freed ports. On shutdown the user ports stay registered,\nand the WORK_STOPPED flag test in mxl862xx_get_stats64() is not atomic\nwith the cancel in mxl862xx_shutdown(), so a re-arm that read the flag\nbefore it was set queues the poll after cancel_delayed_work_sync() has\nreturned.\n\nArm the poll once .setup has succeeded and stop it from a .teardown op,\nwhich DSA calls on unregister and after a failed registration, in both\ncases before it frees the ports. Use disable_delayed_work_sync() there\nand in shutdown(): it drains a running poll as the cancel did and turns\nevery later attempt to queue the work into a no-op, so the re-arm\ncannot bring the poll back. remove() and the probe error path only set\nWORK_STOPPED, which crc_err_work tests before it walks the ports.","modified":"2026-10-09T02:31:02.790728324Z","published":"2026-10-06T08:46:02.190Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98305.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/97df811a11d4f76bc2ffe67b6bf730263f56c668"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e92ad4630f5dd1838ce6bbe6b1bd2c73d34de36"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98305.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98305"},{"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":"a21d33a5265f0b31d935a8b9b2b6faefb5185911"},{"fixed":"97df811a11d4f76bc2ffe67b6bf730263f56c668"},{"fixed":"9e92ad4630f5dd1838ce6bbe6b1bd2c73d34de36"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98305.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.1.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98305.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}