CVE-2022-49443— Linux kernel 安全漏洞
影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | bf3b9f6372c45b0fbf24d86b8794910d20170017< 5d5d993f16be15d124be7b8ec71b28ef7b7dc3af | affected |
bf3b9f6372c45b0fbf24d86b8794910d20170017< cb3e48f7a35033deb9455abe3932e63cb500b9eb | affected | ||
bf3b9f6372c45b0fbf24d86b8794910d20170017< e039c0b5985999b150594126225e1ee51df7b4c9 | affected | ||
bf3b9f6372c45b0fbf24d86b8794910d20170017< d679ae94fdd5d3ab00c35078f5af5f37e068b03d | affected | ||
4.12 | affected | ||
< 4.12 | unaffected | ||
5.15.46≤ 5.15.* | unaffected | ||
5.17.14≤ 5.17.* | unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2022-49443 基础信息
漏洞信息
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Vulnerability Title
list: fix a data-race around ep->rdllist
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: list: fix a data-race around ep->rdllist ep_poll() first calls ep_events_available() with no lock held and checks if ep->rdllist is empty by list_empty_careful(), which reads rdllist->prev. Thus all accesses to it need some protection to avoid store/load-tearing. Note INIT_LIST_HEAD_RCU() already has the annotation for both prev and next. Commit bf3b9f6372c4 ("epoll: Add busy poll support to epoll with socket fds.") added the first lockless ep_events_available(), and commit c5a282e9635e ("fs/epoll: reduce the scope of wq lock in epoll_wait()") made some ep_events_available() calls lockless and added single call under a lock, finally commit e59d3c64cba6 ("epoll: eliminate unnecessary lock for zero timeout") made the last ep_events_available() lockless. BUG: KCSAN: data-race in do_epoll_wait / do_epoll_wait write to 0xffff88810480c7d8 of 8 bytes by task 1802 on cpu 0: INIT_LIST_HEAD include/linux/list.h:38 [inline] list_splice_init include/linux/list.h:492 [inline] ep_start_scan fs/eventpoll.c:622 [inline] ep_send_events fs/eventpoll.c:1656 [inline] ep_poll fs/eventpoll.c:1806 [inline] do_epoll_wait+0x4eb/0xf40 fs/eventpoll.c:2234 do_epoll_pwait fs/eventpoll.c:2268 [inline] __do_sys_epoll_pwait fs/eventpoll.c:2281 [inline] __se_sys_epoll_pwait+0x12b/0x240 fs/eventpoll.c:2275 __x64_sys_epoll_pwait+0x74/0x80 fs/eventpoll.c:2275 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810480c7d8 of 8 bytes by task 1799 on cpu 1: list_empty_careful include/linux/list.h:329 [inline] ep_events_available fs/eventpoll.c:381 [inline] ep_poll fs/eventpoll.c:1797 [inline] do_epoll_wait+0x279/0xf40 fs/eventpoll.c:2234 do_epoll_pwait fs/eventpoll.c:2268 [inline] __do_sys_epoll_pwait fs/eventpoll.c:2281 [inline] __se_sys_epoll_pwait+0x12b/0x240 fs/eventpoll.c:2275 __x64_sys_epoll_pwait+0x74/0x80 fs/eventpoll.c:2275 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0xffff88810480c7d0 -> 0xffff888103c15098 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1799 Comm: syz-fuzzer Tainted: G W 5.17.0-rc7-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
来源: 美国国家漏洞数据库 NVD
CVSS Information
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ep->rdllist的数据竞争。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2022-49443 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-49443 补丁与修复 (4)
同批安全公告 · Linux · 2025-02-26 · 共 706 条
| CVE-2022-49498 | Linux kernel 安全漏洞 | |
| CVE-2022-49486 | Linux kernel 安全漏洞 | |
| CVE-2022-49488 | Linux kernel 安全漏洞 | |
| CVE-2022-49489 | Linux kernel 安全漏洞 | |
| CVE-2022-49490 | Linux kernel 安全漏洞 | |
| CVE-2022-49491 | Linux kernel 安全漏洞 | |
| CVE-2022-49492 | Linux kernel 安全漏洞 | |
| CVE-2022-49493 | Linux kernel 安全漏洞 | |
| CVE-2022-49494 | Linux kernel 安全漏洞 | |
| CVE-2022-49495 | Linux kernel 安全漏洞 | |
| CVE-2022-49497 | Linux kernel 安全漏洞 | |
| CVE-2022-49496 | Linux kernel 安全漏洞 | |
| CVE-2022-49502 | Linux kernel 安全漏洞 | |
| CVE-2022-49507 | Linux kernel 安全漏洞 | |
| CVE-2022-49508 | Linux kernel 安全漏洞 | |
| CVE-2022-49506 | Linux kernel 安全漏洞 | |
| CVE-2022-49504 | Linux kernel 安全漏洞 | |
| CVE-2022-49505 | Linux kernel 安全漏洞 | |
| CVE-2022-49501 | Linux kernel 安全漏洞 | |
| CVE-2022-49500 | Linux kernel 安全漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2022-49443
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