CVE-2022-48771

一、漏洞信息
漏洞编号：CVE-2022-48771
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 V2.0分值：
BaseScore：0.0 Medium
Vector：CVSS：2.0/
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:drm/vmwgfx: Fix stale file descriptors on failed usercopyA failing usercopy of the fence_rep object will lead to a stale entry inthe file descriptor table as put_unused_fd() won t release it. Thisenables userland to refer to a dangling file object through that stillvalid file descriptor, leading to all kinds of use-after-freeexploitation scenarios.Fix this by deferring the call to fd_install() until after the usercopyhas succeeded.
漏洞公开时间：2024-06-20 20:15:15
漏洞创建时间：2024-06-20 21:45:53
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2022-48771

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/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48771	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48771.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191c	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2022-48771	https://bugzilla.suse.com/show_bug.cgi?id=1226732
suse_bugzilla	https://bugzilla.redhat.com/show_bug.cgi?id=2293337	https://bugzilla.suse.com/show_bug.cgi?id=1226732
redhat_bugzilla	https://lore.kernel.org/linux-cve-announce/2024062011-CVE-2022-48771-2c90@gregkh/T	https://bugzilla.redhat.com/show_bug.cgi?id=2293337
ubuntu	https://www.cve.org/CVERecord?id=CVE-2022-48771	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://git.kernel.org/linus/a0f90c8815706981c483a652a6aefca51a5e191c (5.17-rc2)	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191c	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://nvd.nist.gov/vuln/detail/CVE-2022-48771	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://launchpad.net/bugs/cve/CVE-2022-48771	https://ubuntu.com/security/CVE-2022-48771
ubuntu	https://security-tracker.debian.org/tracker/CVE-2022-48771	https://ubuntu.com/security/CVE-2022-48771

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
linux		https://git.kernel.org/linus/a0f90c8815706981c483a652a6aefca51a5e191c	https://git.kernel.org/linus/c906965dee22d5e95d0651759ba107b420212a9f	ubuntu

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:drm/vmwgfx: Fix stale file descriptors on failed usercopyA failing usercopy of the fence_rep object will lead to a stale entry inthe file descriptor table as put_unused_fd() won t release it. Thisenables userland to refer to a dangling file object through that stillvalid file descriptor, leading to all kinds of use-after-freeexploitation scenarios.Fix this by deferring the call to fd_install() until after the usercopyhas succeeded.
openEuler评分：
6.7
Vector：CVSS：2.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/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):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

@yangyingliang ,@jiaoff ,@guohaocs2c ,@hanjun-guo ,@woqidaideshi ,@newbeats ,@zhangyi089 ,@colyli ,@thundertown ,@htforge ,@chiqijun ,@lengchao ,@zhujianwei001 ,@kylin-mayukun ,@wangxiongfeng ,@wkfxxx ,@SuperSix173 ,@jentlestea ,@oskernel0719 ,@gasonchen
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-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):

修复是否涉及abi变化(是/否)：
1.master(6.1.0):
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):

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-2022-48771	None	None	https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414 https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191c https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565 https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82 https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516 https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c
https://ubuntu.com/security/CVE-2022-48771
https://www.opencve.io/cve/CVE-2022-48771	None	None	https://git.kernel.org/stable/c/ae2b20f27732fe92055d9e7b350abc5cdf3e2414 https://git.kernel.org/stable/c/a0f90c8815706981c483a652a6aefca51a5e191c https://git.kernel.org/stable/c/1d833b27fb708d6fdf5de9f6b3a8be4bd4321565 https://git.kernel.org/stable/c/0008a0c78fc33a84e2212a7c04e6b21a36ca6f4d https://git.kernel.org/stable/c/84b1259fe36ae0915f3d6ddcea6377779de48b82 https://git.kernel.org/stable/c/e8d092a62449dcfc73517ca43963d2b8f44d0516 https://git.kernel.org/stable/c/6066977961fc6f437bc064f628cf9b0e4571c56c
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2022-48771

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

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.

@guo-mengqi 请确认分支: master,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP3,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.

CVE-2022-48771

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

drm/vmwgfx: Fix stale file descriptors on failed usercopy

A failing usercopy of the fence_rep object will lead to a stale entry in
the file descriptor table as put_unused_fd() won't release it. This
enables userland to refer to a dangling 'file' object through that still
valid file descriptor, leading to all kinds of use-after-free
exploitation scenarios.

Fix this by deferring the call to fd_install() until after the usercopy
has succeeded.

openEuler评分:(评分和向量)
6.7
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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

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

@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:drm/vmwgfx: Fix stale file descriptors on failed usercopyA failing usercopy of the fence_rep object will lead to a stale entry inthe file descriptor table as put_unused_fd() won't release it. Thisenables userland to refer to a dangling 'file' object through that stillvalid file descriptor, leading to all kinds of use-after-freeexploitation scenarios.Fix this by deferring the call to fd_install() until after the usercopyhas succeeded.
已分析	2.openEulerScore	6.7
已分析	3.openEulerVector	AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP4:不受影响,openEuler-22.03-LTS-SP1:不受影响,openEuler-22.03-LTS-SP3:不受影响,openEuler-22.03-LTS-SP4:不受影响,master: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-SP4:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP3:否,master: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.

CVE-2022-48771

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

drm/vmwgfx: Fix stale file descriptors on failed usercopy

A failing usercopy of the fence_rep object will lead to a stale entry in
the file descriptor table as put_unused_fd() won't release it. This
enables userland to refer to a dangling 'file' object through that still
valid file descriptor, leading to all kinds of use-after-free
exploitation scenarios.

Fix this by deferring the call to fd_install() until after the usercopy
has succeeded.

The Linux kernel CVE team has assigned CVE-2022-48771 to this issue.

openEuler评分:(评分和向量)
6.7
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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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