{"id":"DEBIAN-CVE-2022-49390","details":"In the Linux kernel, the following vulnerability has been resolved:  macsec: fix UAF bug for real_dev  Create a new macsec device but not get reference to real_dev. That can not ensure that real_dev is freed after macsec. That will trigger the UAF bug for real_dev as following:  ================================================================== BUG: KASAN: use-after-free in macsec_get_iflink+0x5f/0x70 drivers/net/macsec.c:3662 Call Trace:  ...  macsec_get_iflink+0x5f/0x70 drivers/net/macsec.c:3662  dev_get_iflink+0x73/0xe0 net/core/dev.c:637  default_operstate net/core/link_watch.c:42 [inline]  rfc2863_policy+0x233/0x2d0 net/core/link_watch.c:54  linkwatch_do_dev+0x2a/0x150 net/core/link_watch.c:161  Allocated by task 22209:  ...  alloc_netdev_mqs+0x98/0x1100 net/core/dev.c:10549  rtnl_create_link+0x9d7/0xc00 net/core/rtnetlink.c:3235  veth_newlink+0x20e/0xa90 drivers/net/veth.c:1748  Freed by task 8:  ...  kfree+0xd6/0x4d0 mm/slub.c:4552  kvfree+0x42/0x50 mm/util.c:615  device_release+0x9f/0x240 drivers/base/core.c:2229  kobject_cleanup lib/kobject.c:673 [inline]  kobject_release lib/kobject.c:704 [inline]  kref_put include/linux/kref.h:65 [inline]  kobject_put+0x1c8/0x540 lib/kobject.c:721  netdev_run_todo+0x72e/0x10b0 net/core/dev.c:10327  After commit faab39f63c1f (\"net: allow out-of-order netdev unregistration\") and commit e5f80fcf869a (\"ipv6: give an IPv6 dev to blackhole_netdev\"), we can add dev_hold_track() in macsec_dev_init() and dev_put_track() in macsec_free_netdev() to fix the problem.","modified":"2026-09-01T20:04:54.637554333Z","published":"2025-02-26T07:01:15.620Z","upstream":["CVE-2022-49390"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49390"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49390.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49390.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49390.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"}]}