CVE-2022-49327— 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bcache在日志空间不足时可能发生死锁。
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | cafe563591446cf80bfbc2fe3bc72a2e36cf1060< 59afd4f287900c8187e968a4153ed35e6b48efce |
affected |
cafe563591446cf80bfbc2fe3bc72a2e36cf1060< 5607652823ac65e2c6885e73bd46d5a4f9a20363 |
affected | ||
cafe563591446cf80bfbc2fe3bc72a2e36cf1060< 6332ea3e35efa12dc08f0cbf5faea5e6e8eb0497 |
affected | ||
cafe563591446cf80bfbc2fe3bc72a2e36cf1060< 1dda32aed6f62c163f38ff947ef5b3360e329159 |
affected | ||
cafe563591446cf80bfbc2fe3bc72a2e36cf1060< 32feee36c30ea06e38ccb8ae6e5c44c6eec790a6 |
affected | ||
3.10 |
affected | ||
< 3.10 |
unaffected | ||
5.10.121≤ 5.10.* |
unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2022-49327 基础信息
漏洞信息
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Vulnerability Title
bcache: avoid journal no-space deadlock by reserving 1 journal bucket
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
bcache: avoid journal no-space deadlock by reserving 1 journal bucket
The journal no-space deadlock was reported time to time. Such deadlock
can happen in the following situation.
When all journal buckets are fully filled by active jset with heavy
write I/O load, the cache set registration (after a reboot) will load
all active jsets and inserting them into the btree again (which is
called journal replay). If a journaled bkey is inserted into a btree
node and results btree node split, new journal request might be
triggered. For example, the btree grows one more level after the node
split, then the root node record in cache device super block will be
upgrade by bch_journal_meta() from bch_btree_set_root(). But there is no
space in journal buckets, the journal replay has to wait for new journal
bucket to be reclaimed after at least one journal bucket replayed. This
is one example that how the journal no-space deadlock happens.
The solution to avoid the deadlock is to reserve 1 journal bucket in
run time, and only permit the reserved journal bucket to be used during
cache set registration procedure for things like journal replay. Then
the journal space will never be fully filled, there is no chance for
journal no-space deadlock to happen anymore.
This patch adds a new member "bool do_reserve" in struct journal, it is
inititalized to 0 (false) when struct journal is allocated, and set to
1 (true) by bch_journal_space_reserve() when all initialization done in
run_cache_set(). In the run time when journal_reclaim() tries to
allocate a new journal bucket, free_journal_buckets() is called to check
whether there are enough free journal buckets to use. If there is only
1 free journal bucket and journal->do_reserve is 1 (true), the last
bucket is reserved and free_journal_buckets() will return 0 to indicate
no free journal bucket. Then journal_reclaim() will give up, and try
next time to see whetheer there is free journal bucket to allocate. By
this method, there is always 1 jouranl bucket reserved in run time.
During the cache set registration, journal->do_reserve is 0 (false), so
the reserved journal bucket can be used to avoid the no-space deadlock.
来源: CVE Program / CVE List V5
CVSS Information
N/A
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bcache在日志空间不足时可能发生死锁。
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-2022-49327 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-49327 补丁与修复 (5)
同批安全公告 · Linux · 2025-02-26 · 共 706 条
| CVE-2022-49149 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49561 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49407 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49362 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49280 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49356 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49418 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49094 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49093 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49260 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49194 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49201 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49058 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2022-49535 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49159 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49138 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49479 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49470 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49111 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2022-49114 | 8.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 706 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2022-49327
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