{"id":"CVE-2026-72411","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-72411","summary":"net: dsa: mxl862xx: fix use-after-free of DSA ports in crc_err_work","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: mxl862xx: fix use-after-free of DSA ports in crc_err_work\n\nUpon an MDIO CRC error mxl862xx_crc_err_work_fn() walks the DSA ports\nand closes the CPU port conduits:\n\n\tdsa_switch_for_each_cpu_port(dp, priv->ds)\n\t\tdev_close(dp->conduit);\n\nmxl862xx_remove() unregisters the switch before cancelling this work:\n\n\tset_bit(MXL862XX_FLAG_WORK_STOPPED, &priv->flags);\n\tcancel_delayed_work_sync(&priv->stats_work);\n\tdsa_unregister_switch(ds);\n\tmxl862xx_host_shutdown(priv);\n\ndsa_unregister_switch() frees the dsa_port objects. If a CRC error\nschedules the work during teardown it can run after the ports have been\nfreed and dereference freed memory.\n\nGuard the port walk with MXL862XX_FLAG_WORK_STOPPED, which is already set\nbefore dsa_unregister_switch(). DSA tears the ports down under\nrtnl_lock(), so checking the flag under rtnl_lock() means the work either\nruns before teardown and sees valid ports, or runs afterwards, observes\nthe flag and skips the walk. This mirrors the host_flood_work handler,\nwhich skips torn-down ports under rtnl_lock().","published":"2026-08-15T05:56:33.508Z","modified":"2026-08-18T03:56:55.785365901Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"7.1.5"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/bcb3b8314611ed9cb4ff4bff484ef9b154fd1b83"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf52622fbc274eb4ca9a2066b258da2ae3dc7406"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72411.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72411"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:55.785365901Z"}}