CVE-2021-47652

一、漏洞信息
漏洞编号：CVE-2021-47652
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.1.8,6.4.0,6.6.0
CVSS V3.0分值：
BaseScore：5.5 Medium
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()I got a null-ptr-deref report:BUG: kernel NULL pointer dereference, address: 0000000000000000...RIP: 0010:fb_destroy_modelist+0x38/0x100...Call Trace: ufx_usb_probe.cold+0x2b5/0xac1 [smscufx] usb_probe_interface+0x1aa/0x3c0 [usbcore] really_probe+0x167/0x460... ret_from_fork+0x1f/0x30If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() willbe called to destroy modelist in the error handling path. But modelisthas not been initialized yet, so it will result in null-ptr-deref.Initialize modelist before calling fb_alloc_cmap() to fix this bug.
漏洞公开时间：2025-02-26 14:37:06
漏洞创建时间：2025-02-26 17:36:47
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2021-47652

更多参考(点击展开)

参考来源	参考链接	来源链接
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47652	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47652.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d	https://bugzilla.suse.com/show_bug.cgi?id=1237721
suse_bugzilla	https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27	https://bugzilla.suse.com/show_bug.cgi?id=1237721

漏洞分析指导链接：
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
openBrain开源漏洞感知系统
漏洞补丁信息：

详情(点击展开)

影响的包	修复版本	修复补丁	问题引入补丁	来源
		https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c		nvd
		https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27		nvd
		https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c		nvd
		https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d		nvd
		https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a		nvd
		https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539		nvd
		https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170		nvd
		https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf		nvd
		https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b		nvd

二、漏洞分析结构反馈
影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()I got a null-ptr-deref report:BUG: kernel NULL pointer dereference, address: 0000000000000000...RIP: 0010:fb_destroy_modelist+0x38/0x100...Call Trace: ufx_usb_probe.cold+0x2b5/0xac1 [smscufx] usb_probe_interface+0x1aa/0x3c0 [usbcore] really_probe+0x167/0x460... ret_from_fork+0x1f/0x30If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() willbe called to destroy modelist in the error handling path. But modelisthas not been initialized yet, so it will result in null-ptr-deref.Initialize modelist before calling fb_alloc_cmap() to fix this bug.
openEuler评分：
5.5
Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
受影响版本排查(受影响/不受影响)：
1.openEuler-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP3(5.10.0):不受影响
3.openEuler-22.03-LTS-SP4(5.10.0):不受影响
4.master(6.6.0):不受影响
5.openEuler-24.03-LTS(6.6.0):不受影响
6.openEuler-24.03-LTS-Next(6.6.0):不受影响
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP3(5.10.0):否
3.master(6.6.0):否
4.openEuler-24.03-LTS(6.6.0):否
5.openEuler-24.03-LTS-Next(6.6.0):否
6.openEuler-22.03-LTS-SP4(5.10.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否

原因说明：
1.openEuler-20.03-LTS-SP4(4.19.90):正常修复
2.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
3.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
5.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不存在
6.openEuler-24.03-LTS(6.6.0):不受影响-漏洞代码不存在
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不存在

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**issue处理注意事项:** 
**1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;**
**2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;**
**3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否), 原因说明)不能省略,省略后cve-manager将无法正常解析填写内容.**
************************************************************************
影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响): 
1.master:
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3:
4.openEuler-22.03-LTS-SP4:
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

修复是否涉及abi变化(是/否)：
1.master:
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3:
4.openEuler-22.03-LTS-SP4:
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

原因说明：
1.master:
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3:
4.openEuler-22.03-LTS-SP4:
5.openEuler-24.03-LTS(6.6.0):
6.openEuler-24.03-LTS-Next(6.6.0):
7.openEuler-24.03-LTS-SP1(6.6.0):

issue处理具体操作请参考: 
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142

Hi openeuler-ci-bot, welcome to the openEuler Community.
I'm the Bot here serving you. You can find the instructions on how to interact with me at Here.
If you have any questions, please contact the SIG: Kernel, and any of the maintainers.

参考网址	关联pr	状态	补丁链接
https://nvd.nist.gov/vuln/detail/CVE-2021-47652
https://ubuntu.com/security/CVE-2021-47652
https://www.opencve.io/cve/CVE-2021-47652
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2021-47652
https://security-tracker.debian.org/tracker/CVE-2021-47652	None	None	https://git.kernel.org/linus/1791f487f877a9e83d81c8677bd3e7b259e7cb27
http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2021-47652

说明：补丁链接仅供初步排查参考，实际可用性请人工再次确认，补丁下载验证可使用CVE补丁工具。
若补丁不准确，烦请在此issue下评论 '/report-patch 参考网址补丁链接1,补丁链接2' 反馈正确信息，便于我们不断优化工具，不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

CVE-2021-47652

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()

I got a null-ptr-deref report:

BUG: kernel NULL pointer dereference, address: 0000000000000000
...
RIP: 0010:fb_destroy_modelist+0x38/0x100
...
Call Trace:
ufx_usb_probe.cold+0x2b5/0xac1 [smscufx]
usb_probe_interface+0x1aa/0x3c0 [usbcore]
really_probe+0x167/0x460
...
ret_from_fork+0x1f/0x30

If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will
be called to destroy modelist in the error handling path. But modelist
has not been initialized yet, so it will result in null-ptr-deref.

Initialize modelist before calling fb_alloc_cmap() to fix this bug.

openEuler评分:(评分和向量)
3.9
AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

受影响版本排查(受影响/不受影响):
1.master(6.1.0):不受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS-SP3:不受影响
4.openEuler-22.03-LTS-SP4:不受影响
5.openEuler-24.03-LTS:不受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:不受影响

修复是否涉及abi变化(是/否)：
1.master(6.1.0):否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS-SP3:否
4.openEuler-22.03-LTS-SP4:否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-24.03-LTS-SP1:否

原因说明：
1.master(23.08.5):不受影响-漏洞代码不能被攻击者触发
2.openEuler-20.03-LTS-SP4:正常修复
4.openEuler-22.03-LTS-SP3:不受影响-漏洞代码不能被攻击者触发
5.openEuler-22.03-LTS-SP4:不受影响-漏洞代码不能被攻击者触发
6.openEuler-24.03-LTS:不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
8.openEuler-24.03-LTS-SP1:不受影响-漏洞代码不能被攻击者触发

CVE-2021-47652

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()

I got a null-ptr-deref report:

BUG: kernel NULL pointer dereference, address: 0000000000000000
...
RIP: 0010:fb_destroy_modelist+0x38/0x100
...
Call Trace:
ufx_usb_probe.cold+0x2b5/0xac1 [smscufx]
usb_probe_interface+0x1aa/0x3c0 [usbcore]
really_probe+0x167/0x460
...
ret_from_fork+0x1f/0x30

If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will
be called to destroy modelist in the error handling path. But modelist
has not been initialized yet, so it will result in null-ptr-deref.

Initialize modelist before calling fb_alloc_cmap() to fix this bug.

openEuler评分:(评分和向量)
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP4:受影响
2.openEuler-22.03-LTS-SP3:不受影响
3.openEuler-22.03-LTS-SP4:不受影响
4.master(6.6.0):不受影响
5.openEuler-24.03-LTS:不受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1:不受影响

原因说明:
1.openEuler-20.03-LTS-SP4:正常修复
2.openEuler-22.03-LTS-SP3:不受影响-漏洞代码不存在
3.openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在
4.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS:不受影响-漏洞代码不存在
6.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1:不受影响-漏洞代码不存在

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP4:否
2.openEuler-22.03-LTS-SP3:否
3.master(23.08.5):否
4.openEuler-24.03-LTS:否
5.openEuler-24.03-LTS-Next:否
6.openEuler-22.03-LTS-SP4:否
7.openEuler-24.03-LTS-SP1:否

===========================================================

@sanglipeng 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 分析项目 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|In the Linux kernel, the following vulnerability has been resolved:video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()I got a null-ptr-deref report:BUG: kernel NULL pointer dereference, address: 0000000000000000...RIP: 0010:fb_destroy_modelist+0x38/0x100...Call Trace: ufx_usb_probe.cold+0x2b5/0xac1 [smscufx] usb_probe_interface+0x1aa/0x3c0 [usbcore] really_probe+0x167/0x460... ret_from_fork+0x1f/0x30If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() willbe called to destroy modelist in the error handling path. But modelisthas not been initialized yet, so it will result in null-ptr-deref.Initialize modelist before calling fb_alloc_cmap() to fix this bug.|
|已分析|2.openEulerScore|5.5|
|已分析|3.openEulerVector|AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H|
|已分析|4.受影响版本排查|openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP3:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-24.03-LTS:不受影响,openEuler-24.03-LTS-Next:不受影响,openEuler-24.03-LTS-SP1:不受影响|
|已分析|5.是否涉及abi变化|openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否,openEuler-24.03-LTS-SP1:否|
|已分析|6.原因说明|openEuler-20.03-LTS-SP4:正常修复,master:不受影响-漏洞代码不能被攻击者触发,openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发,openEuler-22.03-LTS-SP3:不受影响-漏洞代码不存在,openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在,openEuler-24.03-LTS:不受影响-漏洞代码不存在,openEuler-24.03-LTS-SP1:不受影响-漏洞代码不存在|

**请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.**

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