CVE-2021-47519

一、漏洞信息
漏洞编号：CVE-2021-47519
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:can: m_can: m_can_read_fifo: fix memory leak in error branchIn m_can_read_fifo(), if the second call to m_can_fifo_read() fails,the function jump to the out_fail label and returns without callingm_can_receive_skb(). This means that the skb previously allocated byalloc_can_skb() is not freed. In other terms, this is a memory leak.This patch adds a goto label to destroy the skb if an error occurs.Issue was found with GCC -fanalyzer, please follow the link below fordetails.
漏洞公开时间：2024-05-24 23:15:13
漏洞创建时间：2024-05-24 23:50:21
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2021-47519

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/31cb32a590d62b18f69a9a6d433f4e69c74fdd56
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47519	https://bugzilla.suse.com/show_bug.cgi?id=1225430
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2021-47519	https://bugzilla.suse.com/show_bug.cgi?id=1225430
suse_bugzilla	https://git.kernel.org/stable/c/31cb32a590d62b18f69a9a6d433f4e69c74fdd56	https://bugzilla.suse.com/show_bug.cgi?id=1225430
suse_bugzilla	https://git.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908	https://bugzilla.suse.com/show_bug.cgi?id=1225430
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47519.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1225430
suse_bugzilla	https://bugzilla.redhat.com/show_bug.cgi?id=2283432	https://bugzilla.suse.com/show_bug.cgi?id=1225430
redhat_bugzilla	https://lore.kernel.org/linux-cve-announce/2024052432-CVE-2021-47519-ed69@gregkh/T	https://bugzilla.redhat.com/show_bug.cgi?id=2283432
ubuntu	https://www.cve.org/CVERecord?id=CVE-2021-47519	https://ubuntu.com/security/CVE-2021-47519
ubuntu	https://git.kernel.org/linus/31cb32a590d62b18f69a9a6d433f4e69c74fdd56 (5.16-rc5)	https://ubuntu.com/security/CVE-2021-47519
ubuntu	https://git.kernel.org/stable/c/31cb32a590d62b18f69a9a6d433f4e69c74fdd56	https://ubuntu.com/security/CVE-2021-47519
ubuntu	https://git.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908	https://ubuntu.com/security/CVE-2021-47519
ubuntu	https://nvd.nist.gov/vuln/detail/CVE-2021-47519	https://ubuntu.com/security/CVE-2021-47519
ubuntu	https://launchpad.net/bugs/cve/CVE-2021-47519	https://ubuntu.com/security/CVE-2021-47519
ubuntu	https://security-tracker.debian.org/tracker/CVE-2021-47519	https://ubuntu.com/security/CVE-2021-47519
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/31cb32a590d62b18f69a9a6d433f4e69c74fdd56
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908

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/31cb32a590d62b18f69a9a6d433f4e69c74fdd56		nvd
	https://git.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908		nvd
linux	https://git.kernel.org/linus/31cb32a590d62b18f69a9a6d433f4e69c74fdd56	https://git.kernel.org/linus/e39381770ec9ca3c51d8b9bd9cc6e01d78ea974a	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-SP1(5.10.0):不受影响
3.openEuler-22.03-LTS-SP3(5.10.0):不受影响
4.openEuler-22.03-LTS-SP4(5.10.0):不受影响
5.master(6.1.0):不受影响
6.openEuler-24.03-LTS(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(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-SP1(5.10.0):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.master(6.1.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-22.03-LTS-SP4(5.10.0):否

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))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-2021-47519	None	None	https://git.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908 https://git.kernel.org/stable/c/31cb32a590d62b18f69a9a6d433f4e69c74fdd56
https://ubuntu.com/security/CVE-2021-47519	None	None	https://discourse.ubuntu.com/c/ubuntu-pro
https://www.opencve.io/cve/CVE-2021-47519	None	None	https://git.kernel.org/stable/c/75a422165477dd12d2d20aa7c9ee7c9a281c9908 https://git.kernel.org/stable/c/31cb32a590d62b18f69a9a6d433f4e69c74fdd56
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2021-47519
https://security-tracker.debian.org/tracker/CVE-2021-47519

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-2021-47519

影响性分析说明：
Reserved.

openEuler评分:(评分和向量)
4.0
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-SP4:不受影响
2.openEuler-22.03-LTS-SP1: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.master(6.1.0):不受影响
6.openEuler-24.03-LTS:不受影响
7.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-SP4:否
2.openEuler-22.03-LTS-SP1:否
3.openEuler-22.03-LTS-SP3:否
4.master(6.1.0):否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-22.03-LTS-SP4:否

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

CVE-2021-47519

影响性分析说明：
Reserved.

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.openEuler-20.03-LTS-SP4:不受影响
2.openEuler-22.03-LTS-SP1: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.master(6.1.0):不受影响
6.openEuler-24.03-LTS:不受影响
7.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-SP4:否
2.openEuler-22.03-LTS-SP1:否
3.openEuler-22.03-LTS-SP3:否
4.master(6.1.0):否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-22.03-LTS-SP4:否

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

CVE-2021-47519

影响性分析说明：
Reserved.

openEuler评分:(评分和向量)
3.9
CVSS: 3.1/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.openEuler-20.03-LTS-SP4:不受影响
2.openEuler-22.03-LTS-SP1: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.master(6.1.0):不受影响
6.openEuler-24.03-LTS:不受影响
7.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-SP4:否
2.openEuler-22.03-LTS-SP1:否
3.openEuler-22.03-LTS-SP3:否
4.master(6.1.0):否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-22.03-LTS-SP4:否

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

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

CVE-2021-47519

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

can: m_can: m_can_read_fifo: fix memory leak in error branch

In m_can_read_fifo(), if the second call to m_can_fifo_read() fails,
the function jump to the out_fail label and returns without calling
m_can_receive_skb(). This means that the skb previously allocated by
alloc_can_skb() is not freed. In other terms, this is a memory leak.

This patch adds a goto label to destroy the skb if an error occurs.

Issue was found with GCC -fanalyzer, please follow the link below for
details.

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:不受影响
2.openEuler-22.03-LTS-SP1: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.master(6.1.0):不受影响
6.openEuler-24.03-LTS:不受影响
7.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-SP4:否
2.openEuler-22.03-LTS-SP1:否
3.openEuler-22.03-LTS-SP3:否
4.master(6.1.0):否
5.openEuler-24.03-LTS:否
6.openEuler-24.03-LTS-Next:否
7.openEuler-22.03-LTS-SP4:否

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CVE-2021-47519

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