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VULNERABILITIES

CVE-2021-47102 Details

Description

In the Linux kernel, the following vulnerability has been resolved: net: marvell: prestera: fix incorrect structure access In line: upper = info->upper_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]

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.1 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CNA: kernel.orgCVSS-B:7.1 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb kernel.orgExploitMailing ListPatch
https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0 kernel.orgExploitMailing ListPatch
https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb CVEExploitMailing ListPatch
https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0 CVEExploitMailing ListPatch

Weakness Enumeration

CWE-IDCWE NameSource
CWE-125Out-of-bounds Read[email protected]

Affected Products

ProductVersions
linux linux kernel
>= 5.14, < 5.15.12
5.16 rc1
5.16 rc2
5.16 rc3
5.16 rc4

CPE

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

8 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-47102
NVD Published Date:
Mar 4, 2024
NVD Last Modified:
Aug 4, 2026
Source:
kernel.org
CVE-2021-47102 Details - Not Deferred