CVE-2021-47356

一、漏洞信息
 漏洞编号：[CVE-2021-47356](https://nvd.nist.gov/vuln/detail/CVE-2021-47356)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/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：0.0 None
  Vector：CVSS：3.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:mISDN: fix possible use-after-free in HFC_cleanup()This module s remove path calls del_timer(). However, that functiondoes not wait until the timer handler finishes. This means that thetimer handler may still be running after the driver s remove functionhas finished, which would result in a use-after-free.Fix by calling del_timer_sync(), which makes sure the timer handlerhas finished, and unable to re-schedule itself.
 漏洞公开时间：2024-05-21 23:15:21
 漏洞创建时间：2024-05-21 15:36:34
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2021-47356
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47356 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47356 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2021/CVE-2021-47356.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2282394 | https://bugzilla.suse.com/show_bug.cgi?id=1225143 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052142-CVE-2021-47356-a3d4@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282394 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:4211 | https://bugzilla.redhat.com/show_bug.cgi?id=2282394 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:4352 | https://bugzilla.redhat.com/show_bug.cgi?id=2282394 |
| redhat_bugzilla | https://access.redhat.com/errata/RHSA-2024:5692 | https://bugzilla.redhat.com/show_bug.cgi?id=2282394 |
| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47356 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/linus/009fc857c5f6fda81f2f7dd851b2d54193a8e733 (5.14-rc1) | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/49331c07ef0f8fdfa42b30ba6a83a657b29d7fbe | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/54ff3202928952a100c477248e65ac6db01258a7 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/7867ddc5f3de7f289aee63233afc0df4b62834c5 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/5f2818185da0fe82a932f0856633038b66faf124 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/3ecd228c636ee17c14662729737fa07242a93cb0 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/b7ee9ae1e0cf55a037c4a99af2acc5d78cb7802d | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/61370ff07e0acc657559a8fac02551dfeb9d3020 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/ed7c3739d0a07e2ec3ccbffe7e93cea01c438cda | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://git.kernel.org/stable/c/009fc857c5f6fda81f2f7dd851b2d54193a8e733 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47356 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47356 | https://ubuntu.com/security/CVE-2021-47356 |
| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47356 | https://ubuntu.com/security/CVE-2021-47356 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2021-47356 |

</details>

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:
  其它
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源  |
| ------- | -------- | ------- | -------- | --------- |
| linux |  | https://git.kernel.org/linus/009fc857c5f6fda81f2f7dd851b2d54193a8e733 | https://git.kernel.org/linus/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | ubuntu |

</details>

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:mISDN: fix possible use-after-free in HFC_cleanup()This module s remove path calls del_timer(). However, that functiondoes not wait until the timer handler finishes. This means that thetimer handler may still be running after the driver s remove functionhas finished, which would result in a use-after-free.Fix by calling del_timer_sync(), which makes sure the timer handlerhas finished, and unable to re-schedule itself.
 openEuler评分：
  7.7
 Vector：CVSS：3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/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-SP1(5.10.0):受影响
3.openEuler-22.03-LTS-SP3(5.10.0):受影响
4.openEuler-22.03-LTS-SP4(5.10.0):受影响
5.master(6.6.0):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(6.6.0):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

原因说明：
  1.master(6.6.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP1(5.10.0):
4.openEuler-22.03-LTS-SP3(5.10.0):
5.openEuler-22.03-LTS-SP4(5.10.0):
6.openEuler-24.03-LTS(6.6.0):
7.openEuler-24.03-LTS-Next(6.6.0):

src-openEuler/kernel

内容风险标识

评论 (61)

src-openEuler/kernel .gitee-modal { width: 500px !important; }

内容风险标识

CVE-2021-47356

评论 (61)

搜索帮助

src-openEuler/kernel