CVE-2022-50452

MEDIUM EPSS 4.3%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

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>

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥4.19  –  <4.19.264
linuxlinux_kernel*≥4.20  –  <5.4.221
linuxlinux_kernel*≥5.5  –  <5.10.152
linuxlinux_kernel*≥5.11  –  <5.15.76
linuxlinux_kernel*≥5.16  –  <6.0.6
linuxlinux_kernel6.1any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/154f4c06d9dbec1a14e91286c70b6305810302e0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1dc0a019550fd38ec6cab2d73c90df2bd659c96b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/51f9a8921ceacd7bf0d3f47fa867a64988ba1dcb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/86aa1390898146f1de277bb6d2a8ed7fc7a43f12
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae48bee2830bf216800e1447baca39541e27a12e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bc8301ea7e7f1bb9d2ba2fcdf7b5ec2f0792b47e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/154f4c06d9dbec1a14e91286c70b6305810302e0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1dc0a019550fd38ec6cab2d73c90df2bd659c96b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/51f9a8921ceacd7bf0d3f47fa867a64988ba1dcb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/86aa1390898146f1de277bb6d2a8ed7fc7a43f12
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae48bee2830bf216800e1447baca39541e27a12e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bc8301ea7e7f1bb9d2ba2fcdf7b5ec2f0792b47e
    Patch