{"id":"DEBIAN-CVE-2021-47102","details":"In the Linux kernel, the following vulnerability has been resolved:  net: marvell: prestera: fix incorrect structure access  In line: \tupper = info-\u003eupper_dev; We access upper_dev field, which is related only for particular events (e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory access for another events, when ptr is not netdev_notifier_changeupper_info.  The KASAN logs are as follows:  [   30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [   30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778 [   30.139866] [   30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6 [   30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT) [   30.153056] Call trace: [   30.155547]  dump_backtrace+0x0/0x2c0 [   30.159320]  show_stack+0x18/0x30 [   30.162729]  dump_stack_lvl+0x68/0x84 [   30.166491]  print_address_description.constprop.0+0x74/0x2b8 [   30.172346]  kasan_report+0x1e8/0x250 [   30.176102]  __asan_load8+0x98/0xe0 [   30.179682]  prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [   30.186847]  prestera_netdev_event_handler+0x1b4/0x1c0 [prestera] [   30.193313]  raw_notifier_call_chain+0x74/0xa0 [   30.197860]  call_netdevice_notifiers_info+0x68/0xc0 [   30.202924]  register_netdevice+0x3cc/0x760 [   30.207190]  register_netdev+0x24/0x50 [   30.211015]  prestera_device_register+0x8a0/0xba0 [prestera]","modified":"2026-09-15T09:02:35.129850862Z","published":"2024-03-04T18:15:08.600Z","upstream":["CVE-2021-47102"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-47102"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.15-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47102.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.15-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47102.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.15-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47102.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:N/A:H"}]}