CVE-2023-52973

一、漏洞信息
 漏洞编号：[CVE-2023-52973](https://nvd.nist.gov/vuln/detail/CVE-2023-52973)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.1.8,6.4.0,6.6.0
 CVSS V3.0分值：
 BaseScore：7.8 High
 Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
 漏洞简述：
 In the Linux kernel, the following vulnerability has been resolved:vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAFAfter a call to console_unlock() in vcs_read() the vc_data struct can befreed by vc_deallocate(). Because of that, the struct vc_data pointerload must be done at the top of while loop in vcs_read() to avoid a UAFwhen vcs_size() is called.Syzkaller reported a UAF in vcs_size().BUG: KASAN: use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215)Read of size 4 at addr ffff8881137479a8 by task 4a005ed81e27e65/1537CPU: 0 PID: 1537 Comm: 4a005ed81e27e65 Not tainted 6.2.0-rc5 #1Hardware name: Red Hat KVM, BIOS 1.15.0-2.moduleCall Trace: <TASK>__asan_report_load4_noabort (mm/kasan/report_generic.c:350)vcs_size (drivers/tty/vt/vc_screen.c:215)vcs_read (drivers/tty/vt/vc_screen.c:415)vfs_read (fs/read_write.c:468 fs/read_write.c:450)... </TASK>Allocated by task 1191:...kmalloc_trace (mm/slab_common.c:1069)vc_allocate (./include/linux/slab.h:580 ./include/linux/slab.h:720 drivers/tty/vt/vt.c:1128 drivers/tty/vt/vt.c:1108)con_install (drivers/tty/vt/vt.c:3383)tty_init_dev (drivers/tty/tty_io.c:1301 drivers/tty/tty_io.c:1413 drivers/tty/tty_io.c:1390)tty_open (drivers/tty/tty_io.c:2080 drivers/tty/tty_io.c:2126)chrdev_open (fs/char_dev.c:415)do_dentry_open (fs/open.c:883)vfs_open (fs/open.c:1014)...Freed by task 1548:...kfree (mm/slab_common.c:1021)vc_port_destruct (drivers/tty/vt/vt.c:1094)tty_port_destructor (drivers/tty/tty_port.c:296)tty_port_put (drivers/tty/tty_port.c:312)vt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2))vt_ioctl (drivers/tty/vt/vt_ioctl.c:903)tty_ioctl (drivers/tty/tty_io.c:2776)...The buggy address belongs to the object at ffff888113747800 which belongs to the cache kmalloc-1k of size 1024The buggy address is located 424 bytes inside of 1024-byte region [ffff888113747800, ffff888113747c00)The buggy address belongs to the physical page:page:00000000b3fe6c7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113740head:00000000b3fe6c7c order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0anon flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)raw: 0017ffffc0010200 ffff888100042dc0 0000000000000000 dead000000000001raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000page dumped because: kasan: bad access detectedMemory state around the buggy address: ffff888113747880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888113747900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb> ffff888113747980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888113747a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888113747a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb==================================================================Disabling lock debugging due to kernel taint
 漏洞公开时间：2025-03-28 01:15:44
 漏洞创建时间：2025-03-28 02:03:13
 漏洞详情参考链接：
 https://nvd.nist.gov/vuln/detail/CVE-2023-52973
<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/226fae124b2dac217ea5436060d623ff3385bc34 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52973 | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2023-52973 | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34 | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78 | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066 | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18 | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2023/CVE-2023-52973.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2355433 | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| suse_bugzilla | https://github.com/CVEProject/cvelistV5/blob/main//cves/2023/52xxx/CVE-2023-52973.json | https://bugzilla.suse.com/show_bug.cgi?id=1240218 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2025032703-CVE-2023-52973-a993@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2355433 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2023-52973 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2023-52973 |

</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:
 openBrain开源漏洞感知系统
 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  |
| ------- | -------- | ------- | -------- | --------- |
|  |  | https://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34 |  | nvd |
|  |  | https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab |  | nvd |
|  |  | https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78 |  | nvd |
|  |  | https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df |  | nvd |
|  |  | https://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066 |  | nvd |
|  |  | https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f |  | nvd |
|  |  | https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18 |  | nvd |
| linux_kernel | 4.14.329 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=af79ea9a2443016f64d8fd8d72020cc874f0e066Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff | linuxkernelcves |
| linux_kernel | 4.19.273 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6332f52f44b9776568bf3c0b714ddfb0bb175e78Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff | linuxkernelcves |
| linux_kernel | 5.4.232 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=d0332cbf53dad06a22189cc341391237f4ea6d9fIssue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff | linuxkernelcves |
| linux_kernel | 5.10.168 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=55515d7d8743b71b80bfe68e89eb9d92630626abIssue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff | linuxkernelcves |
| linux_kernel | 5.15.93 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff | linuxkernelcves |
| linux_kernel | 6.1.11 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8506f16aae9daf354e3732bcfd447e2a97f023dfIssue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff | linuxkernelcves |
| linux_kernel | 6.2 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=226fae124b2dac217ea5436060d623ff3385bc34Please | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ac751efa6a0d70f2c9daef5c7e3a92270f5c2dff | linuxkernelcves |

</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:vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAFAfter a call to console_unlock() in vcs_read() the vc_data struct can befreed by vc_deallocate(). Because of that, the struct vc_data pointerload must be done at the top of while loop in vcs_read() to avoid a UAFwhen vcs_size() is called.Syzkaller reported a UAF in vcs_size().BUG: KASAN: use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215)Read of size 4 at addr ffff8881137479a8 by task 4a005ed81e27e65/1537CPU: 0 PID: 1537 Comm: 4a005ed81e27e65 Not tainted 6.2.0-rc5 #1Hardware name: Red Hat KVM, BIOS 1.15.0-2.moduleCall Trace: &lt;TASK&gt;__asan_report_load4_noabort (mm/kasan/report_generic.c:350)vcs_size (drivers/tty/vt/vc_screen.c:215)vcs_read (drivers/tty/vt/vc_screen.c:415)vfs_read (fs/read_write.c:468 fs/read_write.c:450)... &lt;/TASK&gt;Allocated by task 1191:...kmalloc_trace (mm/slab_common.c:1069)vc_allocate (./include/linux/slab.h:580 ./include/linux/slab.h:720 drivers/tty/vt/vt.c:1128 drivers/tty/vt/vt.c:1108)con_install (drivers/tty/vt/vt.c:3383)tty_init_dev (drivers/tty/tty_io.c:1301 drivers/tty/tty_io.c:1413 drivers/tty/tty_io.c:1390)tty_open (drivers/tty/tty_io.c:2080 drivers/tty/tty_io.c:2126)chrdev_open (fs/char_dev.c:415)do_dentry_open (fs/open.c:883)vfs_open (fs/open.c:1014)...Freed by task 1548:...kfree (mm/slab_common.c:1021)vc_port_destruct (drivers/tty/vt/vt.c:1094)tty_port_destructor (drivers/tty/tty_port.c:296)tty_port_put (drivers/tty/tty_port.c:312)vt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2))vt_ioctl (drivers/tty/vt/vt_ioctl.c:903)tty_ioctl (drivers/tty/tty_io.c:2776)...The buggy address belongs to the object at ffff888113747800 which belongs to the cache kmalloc-1k of size 1024The buggy address is located 424 bytes inside of 1024-byte region [ffff888113747800, ffff888113747c00)The buggy address belongs to the physical page:page:00000000b3fe6c7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113740head:00000000b3fe6c7c order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0anon flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)raw: 0017ffffc0010200 ffff888100042dc0 0000000000000000 dead000000000001raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000page dumped because: kasan: bad access detectedMemory state around the buggy address: ffff888113747880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888113747900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb<spanclass= q >&gt; ffff888113747980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888113747a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888113747a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb==================================================================Disabling lock debugging due to kernel taintThe Linux kernel CVE team has assigned CVE-2023-52973 to this issue.
 openEuler评分：
 3.9
 Vector：CVSS：3.0/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(4.19.90):受影响
2.master(6.6.0):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.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.master(6.6.0):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.openEuler-22.03-LTS-SP4(5.10.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):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.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-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-22.03-LTS-SP4(5.10.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-24.03-LTS(6.6.0):不受影响-漏洞代码不能被攻击者触发
6.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不能被攻击者触发
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):

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):

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):

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-2023-52973	None	None	https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab https://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066 https://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34 https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18 https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78
https://ubuntu.com/security/CVE-2023-52973	None	None	https://discourse.ubuntu.com/c/project
https://www.opencve.io/cve/CVE-2023-52973	None	None	https://git.kernel.org/stable/c/d0332cbf53dad06a22189cc341391237f4ea6d9f https://git.kernel.org/stable/c/55515d7d8743b71b80bfe68e89eb9d92630626ab https://git.kernel.org/stable/c/af79ea9a2443016f64d8fd8d72020cc874f0e066 https://git.kernel.org/stable/c/226fae124b2dac217ea5436060d623ff3385bc34 https://git.kernel.org/stable/c/fc9e27f3ba083534b8bbf72ab0f5c810ffdc7d18 https://git.kernel.org/stable/c/8506f16aae9daf354e3732bcfd447e2a97f023df https://git.kernel.org/stable/c/6332f52f44b9776568bf3c0b714ddfb0bb175e78
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2023-52973
https://security-tracker.debian.org/tracker/CVE-2023-52973
http://www.cnnvd.org.cn/web/vulnerability/queryLds.tag?qcvCnnvdid=CVE-2023-52973

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-2023-52973

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

vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF

After a call to console_unlock() in vcs_read() the vc_data struct can be
freed by vc_deallocate(). Because of that, the struct vc_data pointer
load must be done at the top of while loop in vcs_read() to avoid a UAF
when vcs_size() is called.

Syzkaller reported a UAF in vcs_size().

BUG: KASAN: use-after-free in vcs_size (drivers/tty/vt/vc_screen.c:215)
Read of size 4 at addr ffff8881137479a8 by task 4a005ed81e27e65/1537

CPU: 0 PID: 1537 Comm: 4a005ed81e27e65 Not tainted 6.2.0-rc5 #1
Hardware name: Red Hat KVM, BIOS 1.15.0-2.module
Call Trace:
  &lt;TASK&gt;
__asan_report_load4_noabort (mm/kasan/report_generic.c:350)
vcs_size (drivers/tty/vt/vc_screen.c:215)
vcs_read (drivers/tty/vt/vc_screen.c:415)
vfs_read (fs/read_write.c:468 fs/read_write.c:450)
...
  &lt;/TASK&gt;

Allocated by task 1191:
...
kmalloc_trace (mm/slab_common.c:1069)
vc_allocate (./include/linux/slab.h:580 ./include/linux/slab.h:720
     drivers/tty/vt/vt.c:1128 drivers/tty/vt/vt.c:1108)
con_install (drivers/tty/vt/vt.c:3383)
tty_init_dev (drivers/tty/tty_io.c:1301 drivers/tty/tty_io.c:1413
     drivers/tty/tty_io.c:1390)
tty_open (drivers/tty/tty_io.c:2080 drivers/tty/tty_io.c:2126)
chrdev_open (fs/char_dev.c:415)
do_dentry_open (fs/open.c:883)
vfs_open (fs/open.c:1014)
...

Freed by task 1548:
...
kfree (mm/slab_common.c:1021)
vc_port_destruct (drivers/tty/vt/vt.c:1094)
tty_port_destructor (drivers/tty/tty_port.c:296)
tty_port_put (drivers/tty/tty_port.c:312)
vt_disallocate_all (drivers/tty/vt/vt_ioctl.c:662 (discriminator 2))
vt_ioctl (drivers/tty/vt/vt_ioctl.c:903)
tty_ioctl (drivers/tty/tty_io.c:2776)
...

The buggy address belongs to the object at ffff888113747800
  which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 424 bytes inside of
  1024-byte region [ffff888113747800, ffff888113747c00)

The buggy address belongs to the physical page:
page:00000000b3fe6c7c refcount:1 mapcount:0 mapping:0000000000000000
     index:0x0 pfn:0x113740
head:00000000b3fe6c7c order:3 compound_mapcount:0 subpages_mapcount:0
     compound_pincount:0
anon flags: 0x17ffffc0010200(slab|head|node=0|zone=2|lastcpupid=0x1fffff)
raw: 0017ffffc0010200 ffff888100042dc0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888113747880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888113747900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
&gt; ffff888113747980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ^
 ffff888113747a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888113747a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Disabling lock debugging due to kernel taint

The Linux kernel CVE team has assigned CVE-2023-52973 to this issue.

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