In the Linux kernel, the following vulnerability has been resolved:
net: sched: cake: fix null pointer access issue when cake_init() fails
When the default qdisc is cake, if the qdisc of dev_queue fails to be
inited during mqprio_init(), cake_reset() is invoked to clear
resources. In this case, the tins is NULL, and it will cause gpf issue.
The process is as follows:
qdisc_create_dflt()
cake_init()
q->tins = kvcalloc(...) --->failed, q->tins is NULL
...
qdisc_put()
...
cake_reset()
...
cake_dequeue_one()
b = &q->tins[...] --->q->tins is NULL
The following is the Call Trace information:
general protection fault, probably for non-canonical address
0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
RIP: 0010:cake_dequeue_one+0xc9/0x3c0
Call Trace:
<TASK>
cake_reset+0xb1/0x140
qdisc_reset+0xed/0x6f0
qdisc_destroy+0x82/0x4c0
qdisc_put+0x9e/0xb0
qdisc_create_dflt+0x2c3/0x4a0
mqprio_init+0xa71/0x1760
qdisc_create+0x3eb/0x1000
tc_modify_qdisc+0x408/0x1720
rtnetlink_rcv_msg+0x38e/0xac0
netlink_rcv_skb+0x12d/0x3a0
netlink_unicast+0x4a2/0x740
netlink_sendmsg+0x826/0xcc0
sock_sendmsg+0xc5/0x100
____sys_sendmsg+0x583/0x690
___sys_sendmsg+0xe8/0x160
__sys_sendmsg+0xbf/0x160
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f89e5122d04
</TASK>
References
Configurations
Configuration 1 (hide)
|
History
16 Jan 2026, 19:23
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/154f4c06d9dbec1a14e91286c70b6305810302e0 - Patch | |
| References | () https://git.kernel.org/stable/c/1dc0a019550fd38ec6cab2d73c90df2bd659c96b - Patch | |
| References | () https://git.kernel.org/stable/c/51f9a8921ceacd7bf0d3f47fa867a64988ba1dcb - Patch | |
| References | () https://git.kernel.org/stable/c/86aa1390898146f1de277bb6d2a8ed7fc7a43f12 - Patch | |
| References | () https://git.kernel.org/stable/c/ae48bee2830bf216800e1447baca39541e27a12e - Patch | |
| References | () https://git.kernel.org/stable/c/bc8301ea7e7f1bb9d2ba2fcdf7b5ec2f0792b47e - Patch | |
| CWE | CWE-476 | |
| First Time |
Linux
Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
01 Oct 2025, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-01 12:15
Updated : 2026-01-16 19:23
NVD link : CVE-2022-50452
Mitre link : CVE-2022-50452
CVE.ORG link : CVE-2022-50452
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference