CVE-2021-47102— net: marvell: prestera: fix incorrect structure access
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I. Basic Information for CVE-2021-47102
Vulnerability Information
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Vulnerability Title
net: marvell: prestera: fix incorrect structure access
Source: NVD (National Vulnerability Database)
Vulnerability 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]
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在不正确的结构访问，会导致其他事件的内存访问无效。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-47102
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Same Patch Batch · Linux · 2024-03-04 · 26 CVEs total
| CVE-2021-47095 | ipmi: ssif: initialize ssif_info->client early | |
| CVE-2021-47108 | drm/mediatek: hdmi: Perform NULL pointer check for mtk_hdmi_conf | |
| CVE-2021-47107 | NFSD: Fix READDIR buffer overflow | |
| CVE-2021-47106 | netfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy() | |
| CVE-2021-47105 | ice: xsk: return xsk buffers back to pool when cleaning the ring | |
| CVE-2021-47104 | IB/qib: Fix memory leak in qib_user_sdma_queue_pkts() | |
| CVE-2021-47103 | inet: fully convert sk->sk_rx_dst to RCU rules | |
| CVE-2021-47101 | asix: fix uninit-value in asix_mdio_read() | |
| CVE-2021-47100 | ipmi: Fix UAF when uninstall ipmi_si and ipmi_msghandler module | |
| CVE-2021-47099 | veth: ensure skb entering GRO are not cloned. | |
| CVE-2021-47098 | hwmon: (lm90) Prevent integer overflow/underflow in hysteresis calculations | |
| CVE-2021-47097 | Input: elantech - fix stack out of bound access in elantech_change_report_id() | |
| CVE-2021-47096 | ALSA: rawmidi - fix the uninitalized user_pversion | |
| CVE-2024-26622 | tomoyo: fix UAF write bug in tomoyo_write_control() | |
| CVE-2021-47094 | KVM: x86/mmu: Don't advance iterator after restart due to yielding | |
| CVE-2021-47093 | platform/x86: intel_pmc_core: fix memleak on registration failure | |
| CVE-2021-47092 | KVM: VMX: Always clear vmx->fail on emulation_required | |
| CVE-2021-47091 | mac80211: fix locking in ieee80211_start_ap error path | |
| CVE-2021-47090 | mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page() | |
| CVE-2021-47089 | kfence: fix memory leak when cat kfence objects |
Showing top 20 of 26 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2021-47102
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