CVE-2021-47102
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47102
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47102.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47102
- Related
- Published
- 2024-03-04T18:15:08Z
- Modified
- 2024-09-18T01:00:20Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: marvell: prestera: fix incorrect structure access
In line: upper = info->upperdev; We access upperdev field, which is related only for particular events (e.g. event == NETDEVCHANGEUPPER). So, this line cause invalid memory access for another events, when ptr is not netdevnotifierchangeupperinfo.
The KASAN logs are as follows:
[ 30.123165] BUG: KASAN: stack-out-of-bounds in presteranetdevportevent.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] dumpbacktrace+0x0/0x2c0 [ 30.159320] showstack+0x18/0x30 [ 30.162729] dumpstacklvl+0x68/0x84 [ 30.166491] printaddressdescription.constprop.0+0x74/0x2b8 [ 30.172346] kasanreport+0x1e8/0x250 [ 30.176102] _asanload8+0x98/0xe0 [ 30.179682] presteranetdevportevent.constprop.0+0x68/0x538 [prestera] [ 30.186847] presteranetdeveventhandler+0x1b4/0x1c0 [prestera] [ 30.193313] rawnotifiercallchain+0x74/0xa0 [ 30.197860] callnetdevicenotifiersinfo+0x68/0xc0 [ 30.202924] registernetdevice+0x3cc/0x760 [ 30.207190] registernetdev+0x24/0x50 [ 30.211015] presteradeviceregister+0x8a0/0xba0 [prestera]
- References
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source