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CVE-2022-50356— net: sched: sfb: fix null pointer access issue when sfb_init() fails

EPSS 0.02% · P5
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I. Basic Information for CVE-2022-50356

Vulnerability Information
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Vulnerability Title
net: sched: sfb: fix null pointer access issue when sfb_init() fails
Source: NVD (National Vulnerability Database)
Vulnerability Description
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>
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，该漏洞源于未正确处理sfb_init失败情况，可能导致空指针取消引用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux e13e02a3c68d899169c78d9a18689bd73491d59a ~ ded86c4191a3c17f8200d17a7d8a6f63b74554ae -
LinuxLinux 2.6.39 -

II. Public POCs for CVE-2022-50356

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III. Intelligence Information for CVE-2022-50356

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Same Patch Batch · Linux · 2025-09-17 · 56 CVEs total

CVE-2022-50371led: qcom-lpg: Fix sleeping in atomic
CVE-2022-50355staging: vt6655: fix some erroneous memory clean-up loops
CVE-2022-50360drm/msm/dp: fix aux-bus EP lifetime
CVE-2022-50357usb: dwc3: core: fix some leaks in probe
CVE-2022-50359media: cx88: Fix a null-ptr-deref bug in buffer_prepare()
CVE-2022-50358brcmfmac: return error when getting invalid max_flowrings from dongle
CVE-2022-50354drm/amdkfd: Fix kfd_process_device_init_vm error handling
CVE-2022-50368drm/msm/dsi: fix memory corruption with too many bridges
CVE-2022-50369drm/vkms: Fix null-ptr-deref in vkms_release()
CVE-2022-50370i2c: designware: Fix handling of real but unexpected device interrupts
CVE-2022-50367fs: fix UAF/GPF bug in nilfs_mdt_destroy
CVE-2022-50372cifs: Fix memory leak when build ntlmssp negotiate blob failed
CVE-2022-50373fs: dlm: fix race in lowcomms
CVE-2022-50374Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure
CVE-2023-53335RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()
CVE-2023-53336media: ipu-bridge: Fix null pointer deref on SSDB/PLD parsing warnings
CVE-2023-53337nilfs2: do not write dirty data after degenerating to read-only
CVE-2023-53338lwt: Fix return values of BPF xmit ops
CVE-2023-53339btrfs: fix BUG_ON condition in btrfs_cancel_balance
CVE-2023-53340net/mlx5: Collect command failures data only for known commands

Showing top 20 of 56 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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