CVE-2022-48797— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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mm模块中发现NUMA迁移问题。在启用NUMA平衡时，可能会导致数据损坏。
影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 09854ba94c6aad7886996bfbee2530b3d8a7f4f4< 254090925e16abd914c87b4ad1b489440d89c4c3 |
affected |
09854ba94c6aad7886996bfbee2530b3d8a7f4f4< b3dc4b9d3ca68b370c4aeab5355007eedf948849 |
affected | ||
09854ba94c6aad7886996bfbee2530b3d8a7f4f4< d187eeb02d18446e5e54ed6bcbf8b47e6551daea |
affected | ||
09854ba94c6aad7886996bfbee2530b3d8a7f4f4< 80d47f5de5e311cbc0d01ebb6ee684e8f4c196c6 |
affected | ||
5.9 |
affected | ||
< 5.9 |
unaffected | ||
5.10.102≤ 5.10.* |
unaffected | ||
5.15.25≤ 5.15.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2022-48797 基础信息
漏洞信息
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Vulnerability Title
mm: don't try to NUMA-migrate COW pages that have other uses
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
mm: don't try to NUMA-migrate COW pages that have other uses
Oded Gabbay reports that enabling NUMA balancing causes corruption with
his Gaudi accelerator test load:
"All the details are in the bug, but the bottom line is that somehow,
this patch causes corruption when the numa balancing feature is
enabled AND we don't use process affinity AND we use GUP to pin pages
so our accelerator can DMA to/from system memory.
Either disabling numa balancing, using process affinity to bind to
specific numa-node or reverting this patch causes the bug to
disappear"
and Oded bisected the issue to commit 09854ba94c6a ("mm: do_wp_page()
simplification").
Now, the NUMA balancing shouldn't actually be changing the writability
of a page, and as such shouldn't matter for COW. But it appears it
does. Suspicious.
However, regardless of that, the condition for enabling NUMA faults in
change_pte_range() is nonsensical. It uses "page_mapcount(page)" to
decide if a COW page should be NUMA-protected or not, and that makes
absolutely no sense.
The number of mappings a page has is irrelevant: not only does GUP get a
reference to a page as in Oded's case, but the other mappings migth be
paged out and the only reference to them would be in the page count.
Since we should never try to NUMA-balance a page that we can't move
anyway due to other references, just fix the code to use 'page_count()'.
Oded confirms that that fixes his issue.
Now, this does imply that something in NUMA balancing ends up changing
page protections (other than the obvious one of making the page
inaccessible to get the NUMA faulting information). Otherwise the COW
simplification wouldn't matter - since doing the GUP on the page would
make sure it's writable.
The cause of that permission change would be good to figure out too,
since it clearly results in spurious COW events - but fixing the
nonsensical test that just happened to work before is obviously the
CorrectThing(tm) to do regardless.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
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mm模块中发现NUMA迁移问题。在启用NUMA平衡时，可能会导致数据损坏。
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-2022-48797 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-48797 其他参考 (3)
同批安全公告 · Linux · 2024-07-16 · 共 98 条
| CVE-2022-48790 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48789 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48788 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48851 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48829 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48828 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-48864 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48830 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48782 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48785 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48816 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48791 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-41008 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48821 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48822 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48801 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48796 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48792 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48786 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-48787 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 98 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-48797
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