CVE-2022-49896

一、漏洞信息
漏洞编号：CVE-2022-49896
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.6.0
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:cxl/pmem: Fix cxl_pmem_region and cxl_memdev leakWhen a cxl_nvdimm object goes through a ->remove() event (devicephysically removed, nvdimm-bridge disabled, or nvdimm device disabled),then any associated regions must also be disabled. As highlighted by thecxl-create-region.sh test [1], a single device may host multipleregions, but the driver was only tracking one region at a time. Thisleads to a situation where only the last enabled region per nvdimmdevice is cleaned up properly. Other regions are leaked, and this alsocauses cxl_memdev reference leaks.Fix the tracking by allowing cxl_nvdimm objects to track multiple regionassociations.
漏洞公开时间：2025-05-01 23:16:14
漏洞创建时间：2025-05-02 00:39:58
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2022-49896

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/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-49896	https://bugzilla.suse.com/show_bug.cgi?id=1242462
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2022-49896	https://bugzilla.suse.com/show_bug.cgi?id=1242462
suse_bugzilla	https://git.kernel.org/stable/c/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a	https://bugzilla.suse.com/show_bug.cgi?id=1242462
suse_bugzilla	https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6	https://bugzilla.suse.com/show_bug.cgi?id=1242462
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-49896.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1242462
suse_bugzilla	https://bugzilla.redhat.com/show_bug.cgi?id=2363521	https://bugzilla.suse.com/show_bug.cgi?id=1242462

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/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a		nvd
		https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6		nvd
linux_kernel	6.0.8	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f43b6bfdbab78606735ba81185cf0602b81e40b6Issue	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=04ad63f086d1a9649b8b082748cbc7a570ade461	linuxkernelcves
linux_kernel	6.1	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4d07ae22e79ebc2d7528bbc69daa53b86981cb3aPlease	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=04ad63f086d1a9649b8b082748cbc7a570ade461	linuxkernelcves

二、漏洞分析结构反馈
影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
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):
8.openEuler-24.03-LTS-SP2(6.6.0):

修复是否涉及abi变化(是/否)：
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
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):
8.openEuler-24.03-LTS-SP2(6.6.0):

原因说明：
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
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):
8.openEuler-24.03-LTS-SP2(6.6.0):

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.

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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(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
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):
8.openEuler-24.03-LTS-SP2(6.6.0):

修复是否涉及abi变化(是/否)：
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
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):
8.openEuler-24.03-LTS-SP2(6.6.0):

原因说明：
1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP3(5.10.0):
4.openEuler-22.03-LTS-SP4(5.10.0):
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):
8.openEuler-24.03-LTS-SP2(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

参考网址	关联pr	状态	补丁链接
https://nvd.nist.gov/vuln/detail/CVE-2022-49896	None	None	https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6 https://git.kernel.org/stable/c/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a
https://ubuntu.com/security/CVE-2022-49896
https://www.opencve.io/cve/CVE-2022-49896	None	None	https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6 https://git.kernel.org/stable/c/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2022-49896
https://security-tracker.debian.org/tracker/CVE-2022-49896
http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2022-49896

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-2022-49896

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

cxl/pmem: Fix cxl_pmem_region and cxl_memdev leak

When a cxl_nvdimm object goes through a ->remove() event (device
physically removed, nvdimm-bridge disabled, or nvdimm device disabled),
then any associated regions must also be disabled. As highlighted by the
cxl-create-region.sh test [1], a single device may host multiple
regions, but the driver was only tracking one region at a time. This
leads to a situation where only the last enabled region per nvdimm
device is cleaned up properly. Other regions are leaked, and this also
causes cxl_memdev reference leaks.

Fix the tracking by allowing cxl_nvdimm objects to track multiple region
associations.

The Linux kernel CVE team has assigned CVE-2022-49896 to this issue.

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.master(6.1.0):不受影响
2.openEuler-20.03-LTS-SP4:不受影响
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
8.openEuler-24.03-LTS-SP2: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
8.openEuler-24.03-LTS-SP2: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:不受影响-漏洞代码不存在
3.openEuler-22.03-LTS-SP3:不受影响-漏洞代码不存在
4.openEuler-22.03-LTS-SP4:不受影响-漏洞代码不存在
5.openEuler-24.03-LTS:不受影响-漏洞代码不能被攻击者触发
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-漏洞代码不能被攻击者触发
8.openEuler-24.03-LTS-SP2:不受影响-漏洞代码不能被攻击者触发

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