CVE-2022-50356

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-50356
In the Linux kernel, the following vulnerability has been resolved: net: sched: sfb: fix null pointer access issue when sfb_init() fails When the default qdisc is sfb, if the qdisc of dev_queue fails to be inited during mqprio_init(), sfb_reset() is invoked to clear resources. In this case, the q->qdisc is NULL, and it will cause gpf issue. The process is as follows: qdisc_create_dflt() sfb_init() tcf_block_get() --->failed, q->qdisc is NULL ... qdisc_put() ... sfb_reset() qdisc_reset(q->qdisc) --->q->qdisc is NULL ops = qdisc->ops The following is the Call Trace information: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] RIP: 0010:qdisc_reset+0x2b/0x6f0 Call Trace: <TASK> sfb_reset+0x37/0xd0 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: 0033:0x7f2164122d04 </TASK>

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/2a3fc78210b9f0e85372a2435368962009f480fc Patch
https://git.kernel.org/stable/c/723399af2795fb95687a531c9480464b5f489333 Patch
https://git.kernel.org/stable/c/c2e1e59d59fafe297779ceae1fe0e6fbebc3e745 Patch
https://git.kernel.org/stable/c/ded86c4191a3c17f8200d17a7d8a6f63b74554ae Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*
History

10 Dec 2025, 16:58

Type Values Removed Values Added
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 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/2a3fc78210b9f0e85372a2435368962009f480fc - () https://git.kernel.org/stable/c/2a3fc78210b9f0e85372a2435368962009f480fc - Patch
References () https://git.kernel.org/stable/c/723399af2795fb95687a531c9480464b5f489333 - () https://git.kernel.org/stable/c/723399af2795fb95687a531c9480464b5f489333 - Patch
References () https://git.kernel.org/stable/c/c2e1e59d59fafe297779ceae1fe0e6fbebc3e745 - () https://git.kernel.org/stable/c/c2e1e59d59fafe297779ceae1fe0e6fbebc3e745 - Patch
References () https://git.kernel.org/stable/c/ded86c4191a3c17f8200d17a7d8a6f63b74554ae - () https://git.kernel.org/stable/c/ded86c4191a3c17f8200d17a7d8a6f63b74554ae - Patch

17 Sep 2025, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-09-17 15:15

Updated : 2025-12-10 16:58

NVD link : CVE-2022-50356

Mitre link : CVE-2022-50356

CVE.ORG link : CVE-2022-50356

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference