CVE-2021-47385

一、漏洞信息
漏洞编号：CVE-2021-47385
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0
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:hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure fieldIf driver read val value sufficient for(val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 4) & 0x7))from device then Null pointer dereference occurs.(It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers)Also lm75[] does not serve a purpose anymore after switching todevm_i2c_new_dummy_device() in w83791d_detect_subclients().The patch fixes possible NULL pointer dereference by removing lm75[].Found by Linux Driver Verification project (linuxtesting.org).[groeck: Dropped unnecessary continuation lines, fixed multipline alignment]
漏洞公开时间：2024-05-21 23:15:24
漏洞创建时间：2024-05-21 20:16:24
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2021-47385

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/0f36b88173f028e372668ae040ab1a496834d278
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47385	https://bugzilla.suse.com/show_bug.cgi?id=1225210
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2021-47385	https://bugzilla.suse.com/show_bug.cgi?id=1225210
suse_bugzilla	https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278	https://bugzilla.suse.com/show_bug.cgi?id=1225210
suse_bugzilla	https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3	https://bugzilla.suse.com/show_bug.cgi?id=1225210
suse_bugzilla	https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1	https://bugzilla.suse.com/show_bug.cgi?id=1225210
suse_bugzilla	https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3	https://bugzilla.suse.com/show_bug.cgi?id=1225210
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47385.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1225210
suse_bugzilla	https://bugzilla.redhat.com/show_bug.cgi?id=2282355	https://bugzilla.suse.com/show_bug.cgi?id=1225210
redhat_bugzilla	https://lore.kernel.org/linux-cve-announce/2024052144-CVE-2021-47385-a7e7@gregkh/T	https://bugzilla.redhat.com/show_bug.cgi?id=2282355
redhat_bugzilla	https://access.redhat.com/errata/RHSA-2024:5281	https://bugzilla.redhat.com/show_bug.cgi?id=2282355
redhat_bugzilla	https://access.redhat.com/errata/RHSA-2024:6206	https://bugzilla.redhat.com/show_bug.cgi?id=2282355
redhat_bugzilla	https://access.redhat.com/errata/RHSA-2024:7001	https://bugzilla.redhat.com/show_bug.cgi?id=2282355
redhat_bugzilla	https://access.redhat.com/errata/RHSA-2024:7000	https://bugzilla.redhat.com/show_bug.cgi?id=2282355
redhat_bugzilla	https://access.redhat.com/errata/RHSA-2024:8158	https://bugzilla.redhat.com/show_bug.cgi?id=2282355
redhat_bugzilla	https://access.redhat.com/errata/RHSA-2024:8157	https://bugzilla.redhat.com/show_bug.cgi?id=2282355
redhat_bugzilla	https://access.redhat.com/errata/RHSA-2024:8162	https://bugzilla.redhat.com/show_bug.cgi?id=2282355
ubuntu	https://www.cve.org/CVERecord?id=CVE-2021-47385	https://ubuntu.com/security/CVE-2021-47385
ubuntu	https://git.kernel.org/linus/0f36b88173f028e372668ae040ab1a496834d278 (5.15-rc4)	https://ubuntu.com/security/CVE-2021-47385
ubuntu	https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1	https://ubuntu.com/security/CVE-2021-47385
ubuntu	https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3	https://ubuntu.com/security/CVE-2021-47385
ubuntu	https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3	https://ubuntu.com/security/CVE-2021-47385
ubuntu	https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278	https://ubuntu.com/security/CVE-2021-47385
ubuntu	https://nvd.nist.gov/vuln/detail/CVE-2021-47385	https://ubuntu.com/security/CVE-2021-47385
ubuntu	https://launchpad.net/bugs/cve/CVE-2021-47385	https://ubuntu.com/security/CVE-2021-47385
ubuntu	https://security-tracker.debian.org/tracker/CVE-2021-47385	https://ubuntu.com/security/CVE-2021-47385
anolis		https://anas.openanolis.cn/cves/detail/CVE-2021-47385

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	修复补丁	问题引入补丁	来源
	https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278		nvd
	https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3		nvd
	https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1		nvd
	https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3		nvd
linux	https://git.kernel.org/linus/0f36b88173f028e372668ae040ab1a496834d278	https://git.kernel.org/linus/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2	ubuntu

二、漏洞分析结构反馈
影响性分析说明：
Reserved.
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):不受影响
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
8.openEuler-24.03-LTS-SP2(6.6.0):

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
8.openEuler-24.03-LTS-SP2(6.6.0):

原因说明：
1.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
2.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
3.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
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
8.openEuler-24.03-LTS-SP2(6.6.0):

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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))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(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):
9.openEuler-22.03-LTS-SP4:
10.openEuler-24.03-LTS:
11.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):
9.openEuler-22.03-LTS-SP4:
10.openEuler-24.03-LTS:
11.openEuler-24.03-LTS-Next:

-----------------------------------------------------------------------
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

参考网址	关联pr	状态	补丁链接
https://nvd.nist.gov/vuln/detail/CVE-2021-47385	None	None	https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278
https://www.opencve.io/cve/CVE-2021-47385	None	None	https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1 https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3 https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3 https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2021-47385
https://security-tracker.debian.org/tracker/CVE-2021-47385	None	None	https://git.kernel.org/linus/0f36b88173f028e372668ae040ab1a496834d278

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-2021-47385

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

hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure field

If driver read val value sufficient for
(val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 4) & 0x7))
from device then Null pointer dereference occurs.
(It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers)
Also lm75[] does not serve a purpose anymore after switching to
devm_i2c_new_dummy_device() in w83791d_detect_subclients().

The patch fixes possible NULL pointer dereference by removing lm75[].

Found by Linux Driver Verification project (linuxtesting.org).

[groeck: Dropped unnecessary continuation lines, fixed multipline alignment]

openEuler评分:(评分和向量)
5.5
CVSS: 3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP1:不受影响
2.openEuler-20.03-LTS-SP4:不受影响
3.openEuler-22.03-LTS:受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:不受影响
11.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@sanglipeng 经过 cve-manager 解析, 已分析的内容如下表所示:
| 状态  | 需分析 | 内容 |
|:--:|:--:|---------|
|已分析|1.影响性分析说明|In the Linux kernel, the following vulnerability has been resolved:hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure fieldIf driver read val value sufficient for(val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 4) & 0x7))from device then Null pointer dereference occurs.(It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers)Also lm75[] does not serve a purpose anymore after switching todevm_i2c_new_dummy_device() in w83791d_detect_subclients().The patch fixes possible NULL pointer dereference by removing lm75[].Found by Linux Driver Verification project (linuxtesting.org).[groeck: Dropped unnecessary continuation lines, fixed multipline alignment]|
|已分析|2.openEulerScore|5.5|
|已分析|3.openEulerVector|AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N|
|已分析|4.受影响版本排查|openEuler-22.03-LTS:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP2:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-20.03-LTS-SP1:不受影响,openEuler-20.03-LTS-SP4:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响,openEuler-24.03-LTS:不受影响,openEuler-24.03-LTS-Next:不受影响|
|已分析|5.修复是否涉及abi变化|openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否|

**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.**